技术领域technical field
本发明属于触控传感器领域，具体涉及一种纳米纤维素纸基触控传感器及其制备方法与应用。The invention belongs to the field of touch sensors, and in particular relates to a nanocellulose paper-based touch sensor and a preparation method and application thereof.
背景技术Background technique
触控传感器是一种通过触摸控制信号传递的数据输入装置，在触摸屏、智能手机、平板电脑等电子设备中应用广泛。现有的柔性触控传感器大多以高分子聚合物作为基底，然而其制造过程成本高且易对环境造成污染，所以目前许多研究集中在纸基触控传感器上。A touch sensor is a data input device that transmits a touch control signal, and is widely used in electronic devices such as touch screens, smart phones, and tablet computers. Most of the existing flexible touch sensors are based on high-molecular polymers. However, the manufacturing process is costly and easily pollutes the environment. Therefore, many current researches focus on paper-based touch sensors.
纸基触控传感器具有柔性、成本低、环境友好等优点，目前的纸基触控传感器主要以打印纸或者相片纸作为基底，以金属，例如银和金作为导电电极。这类纸基触控传感器在应用上面临一些问题：第一，不具有透明度，无法应用在显示领域；第二，由于导电层使用的是金属材料，存在潜在的环境影响，也不能直接回收利用；第三，其强度有待进一步提高。Paper-based touch sensors have the advantages of flexibility, low cost, and environmental friendliness. Currently, paper-based touch sensors are mainly based on printing paper or photo paper, and metals, such as silver and gold, are used as conductive electrodes. This type of paper-based touch sensor faces some problems in application: first, it does not have transparency and cannot be used in the display field; second, because the conductive layer is made of metal material, there is potential environmental impact, and it cannot be directly recycled. ; Third, its strength needs to be further improved.
发明内容SUMMARY OF THE INVENTION
为了解决上述技术问题，本发明的首要目的在于提供一种纳米纤维素纸基触控传感器。该传感器具有高透明、可回收和可降解的特点。In order to solve the above technical problems, the primary purpose of the present invention is to provide a nanocellulose paper-based touch sensor. The sensor is highly transparent, recyclable and degradable.
本发明的另一目在于提供上述纳米纤维素纸基触控传感器的制备方法。Another object of the present invention is to provide a preparation method of the above nanocellulose paper-based touch sensor.
本发明的再一目在于提供上述纳米纤维素纸基触控传感器的应用。Another object of the present invention is to provide the application of the above nanocellulose paper-based touch sensor.
为了实现上述目的，本发明采用的技术方案如下：In order to achieve the above object, the technical scheme adopted in the present invention is as follows:
一种纳米纤维素纸基触控传感器，包括基底和导电层，所述的基底为纳米纤维素纸基，该纸基呈透明状；所述的导电层为平面梳状排列在基底上的PEDOT:PSS(聚3,4-亚乙基二氧噻吩：聚苯乙烯磺酸)像素单元。A nano-cellulose paper-based touch sensor, comprising a substrate and a conductive layer, the substrate is a nano-cellulose paper base, and the paper base is transparent; the conductive layer is a PEDOT arranged in a plane comb shape on the substrate : PSS (poly3,4-ethylenedioxythiophene:polystyrenesulfonic acid) pixel unit.
优选的，所述的PEDOT:PSS像素单元通过喷墨打印的方式沉积于纳米纤维素纸基的表面。Preferably, the PEDOT:PSS pixel unit is deposited on the surface of the nanocellulose paper base by inkjet printing.
所得的纳米纤维素纸基触控传感器的透光率为79.9％，可直接回收利用，溶解于水后可再次抽滤成膜，该传感器完全由生物相容的材料(纳米纤维素、PEDOT:PSS)组成，环境友好，不产生电子垃圾。The light transmittance of the obtained nanocellulose paper-based touch sensor is 79.9%, which can be directly recycled, and can be filtered again after being dissolved in water to form a film. The sensor is completely made of biocompatible materials (nanocellulose, PEDOT: PSS) composition, environmentally friendly, does not generate electronic waste.
本发明进一步提供上述纳米纤维素纸基触控传感器的制备方法，包括以下步骤：The present invention further provides a method for preparing the aforementioned nanocellulose paper-based touch sensor, comprising the following steps:
(1)纳米纤维素纸基的制备：(1) Preparation of nanocellulose paper base:
将纤维素原料粉碎，加入去离子水中混合打浆，使纤维素均匀分散，得到纤维素悬浮液，在纤维素悬浮液中依次加入Tempo溶液(2，2，6，6-四甲基哌啶-氧化物)、溴化钠溶液(NaBr)和次氯酸钠溶液(NaClO)，搅拌均匀，得到反应溶液，加入去离子水调节反应溶液中纤维素的浓度，再加入缓冲溶液Ⅰ调节pH值维持在10.0左右，进行氧化反应，然后加入无水乙醇停止反应，搅拌均匀，加入缓冲溶液Ⅱ调节pH至7.0，对反应产物进行真空抽滤，同时洗涤至不含杂质，得到Tempo氧化后悬浮液，将Tempo氧化后悬浮液加入去离子水稀释，然后进行高压均质，得到纳米纤维素水分散液，超声脱泡后均匀涂覆在玻璃板上，盖上防尘罩，常温下干燥，得到纳米纤维素纸基；The cellulose raw material is pulverized, mixed and beaten in deionized water to make the cellulose evenly dispersed to obtain a cellulose suspension, and Tempo solution (2,2,6,6-tetramethylpiperidine- oxide), sodium bromide solution (NaBr) and sodium hypochlorite solution (NaClO), stir evenly to obtain a reaction solution, add deionized water to adjust the concentration of cellulose in the reaction solution, and then add buffer solution I to adjust the pH value to maintain at about 10.0 , carry out the oxidation reaction, then add absolute ethanol to stop the reaction, stir evenly, add buffer solution II to adjust the pH to 7.0, carry out vacuum filtration on the reaction product, and wash it to contain no impurities at the same time to obtain a suspension after Tempo oxidation, and oxidize Tempo The suspension was diluted with deionized water, and then subjected to high pressure homogenization to obtain an aqueous nanocellulose dispersion, which was uniformly coated on a glass plate after ultrasonic defoaming, covered with a dust cover, and dried at room temperature to obtain nanocellulose paper base;
(2)喷墨打印PEDOT:PSS导电层(2) Inkjet printing PEDOT:PSS conductive layer
在PEDOT:PSS溶液中加入有机掺杂剂，得到油墨，搅拌均匀后超声脱泡，将油墨通过针头过滤器进行过滤，去除大颗粒油墨，然后通过注射器注入到打印机黑色墨盒中，通过CAD绘制的梳状电路图像将PEDOT:PSS喷墨打印至纳米纤维素纸基表面形成梳状电极，然后将喷墨打印后的纳米纤维素纸进行退火处理，即得到所述的纳米纤维素纸基触控传感器。Add organic dopant to the PEDOT:PSS solution to obtain ink, stir evenly and then ultrasonically defoaming, filter the ink through a needle filter to remove large particles of ink, and then inject it into the black ink cartridge of the printer through a syringe, drawn by CAD Comb circuit image: PEDOT:PSS is inkjet printed on the surface of nanocellulose paper base to form comb electrodes, and then the inkjet printed nanocellulose paper is annealed to obtain the nanocellulose paper base touch control sensor.
优选的，步骤(1)中所述的纤维素原料为阔叶木浆、针叶木浆、棉浆、竹浆或秸秆浆。Preferably, the cellulose raw material in step (1) is hardwood pulp, softwood pulp, cotton pulp, bamboo pulp or straw pulp.
优选的，步骤(1)中所述的纤维素悬浮液中纤维素的浓度为0.02g/mL。Preferably, the concentration of cellulose in the cellulose suspension described in step (1) is 0.02 g/mL.
优选的，步骤(1)中所述的加入去离子水调节反应溶液中纤维素的浓度为1～1.5wt％。Preferably, in step (1), adding deionized water to adjust the concentration of cellulose in the reaction solution is 1-1.5 wt %.
优选的，步骤(1)中所述的缓冲溶液Ⅰ为碳酸钠、碳酸氢钠或氢氧化钠。Preferably, the buffer solution I described in step (1) is sodium carbonate, sodium bicarbonate or sodium hydroxide.
优选的，步骤(1)中所述的反应溶液中，纤维素原料与TEMPO的质量比为1：0.012～0.020；纤维素原料与溴化钠的质量比为1：0.08～0.12；纤维素原料与NaClO的质量比为1：0.30～0.53，所述的纤维素原料以绝干原料计。Preferably, in the reaction solution described in step (1), the mass ratio of cellulose raw material to TEMPO is 1:0.012-0.020; the mass ratio of cellulose raw material to sodium bromide is 1:0.08-0.12; The mass ratio to NaClO is 1:0.30-0.53, and the cellulose raw material is calculated as absolute dry raw material.
优选的，步骤(1)中所述的氧化反应的时长为4～8h。Preferably, the duration of the oxidation reaction described in step (1) is 4-8h.
优选的，步骤(1)中所述的加入无水乙醇停止反应后的搅拌均匀的时长为30～60min。Preferably, the time for uniform stirring after adding absolute ethanol to stop the reaction in step (1) is 30-60 min.
优选的，步骤(1)中所述的缓冲溶液Ⅱ为盐酸、醋酸或磷酸。Preferably, the buffer solution II described in step (1) is hydrochloric acid, acetic acid or phosphoric acid.
优选的，步骤(1)中所述的洗涤至不含杂质的方法为在抽滤的同时用去离子水洗涤3～5次。Preferably, the method for washing to be free of impurities in step (1) is to wash with deionized water for 3 to 5 times while suction filtration.
优选的，步骤(1)中所述的将Tempo氧化后悬浮液加入去离子水稀释后，所得溶液中的纤维素的浓度为1～1.8wt％。Preferably, after adding deionized water to dilute the oxidized Tempo suspension described in step (1), the concentration of cellulose in the obtained solution is 1-1.8 wt %.
优选的，步骤(1)中所述的高压均质通过微射流高压均质机进行，高压均质过程重复4～10次，压力为50～100MPa。Preferably, the high-pressure homogenization described in step (1) is performed by a micro-jet high-pressure homogenizer, and the high-pressure homogenization process is repeated 4 to 10 times, and the pressure is 50 to 100 MPa.
优选的，步骤(1)中所述的超声脱泡的条件为在50～60℃和80～100W的条件下超声脱泡30～60min。Preferably, the conditions for ultrasonic defoaming in step (1) are ultrasonic defoaming at 50-60° C. and 80-100 W for 30-60 min.
优选的，步骤(1)中所述的均匀涂覆采用滚轴进行。Preferably, the uniform coating described in step (1) is carried out with a roller.
优选的，步骤(1)中所述的常温干燥的条件为在20～30℃下干燥72～96h。Preferably, the drying conditions at room temperature in step (1) are drying at 20-30° C. for 72-96 hours.
优选的，步骤(2)中所述的PEDOT:PSS溶液中的固体含量为0.6～1.2％，PEDOT与PSS的质量比为1:6。Preferably, the solid content in the PEDOT:PSS solution described in step (2) is 0.6-1.2%, and the mass ratio of PEDOT to PSS is 1:6.
优选的，步骤(2)中所述的有机掺杂剂为乙二醇、丙三醇、无水乙醇、二甲基亚砜、曲拉通X-100和对甲苯磺酸中的一种或两种以上。Preferably, the organic dopant described in step (2) is one of ethylene glycol, glycerol, anhydrous ethanol, dimethyl sulfoxide, Triton X-100 and p-toluenesulfonic acid or two or more.
优选的，步骤(2)中所述的油墨中，PEDOT:PSS溶液质量与有机掺杂剂的质量比为89:11。Preferably, in the ink described in step (2), the mass ratio of the PEDOT:PSS solution mass to the organic dopant is 89:11.
步骤(2)中在PEDOT:PSS溶液中加入有机掺杂剂的目的是提高油墨导电性。The purpose of adding an organic dopant to the PEDOT:PSS solution in step (2) is to improve the conductivity of the ink.
优选的，步骤(2)中所述的搅拌的时长为30～60min。Preferably, the stirring time in step (2) is 30-60 min.
优选的，步骤(2)中所述的超声脱泡的条件为在50～60℃和80～100W的条件下超声脱泡30～60min。Preferably, the conditions for ultrasonic defoaming in step (2) are ultrasonic defoaming at 50-60° C. and 80-100 W for 30-60 minutes.
优选的，步骤(2)中所述的针头过滤器为直径0.45μm的醋酸纤维素过滤器。Preferably, the syringe filter described in step (2) is a cellulose acetate filter with a diameter of 0.45 μm.
优选的，步骤(2)中所述的喷墨打印过程需要重复5～15次。Preferably, the inkjet printing process described in step (2) needs to be repeated 5-15 times.
优选的，步骤(2)中所述的退火处理的条件为在80～100℃下处理30～60min。Preferably, the condition of the annealing treatment in step (2) is to treat at 80-100° C. for 30-60 min.
步骤(2)中退火处理的目的是降低导电层电阻。The purpose of the annealing treatment in step (2) is to reduce the resistance of the conductive layer.
本发明进一步提供一种上述纳米纤维素纸基触控传感器的应用，将所述的纳米纤维素纸基触控传感器用作LED的触控开关。The present invention further provides an application of the above nanocellulose paper-based touch sensor, wherein the nanocellulose paper-based touch sensor is used as an LED touch switch.
本发明与现有技术相比，具有如下优点和有益效果：Compared with the prior art, the present invention has the following advantages and beneficial effects:
(1)本发明沉积导电层使用的方法为喷墨打印，所使用的溶剂为常见、平价、毒性小的有机溶剂，与传统的刻蚀法、气相沉积法相比具有环保、低成本的优点。同时喷墨打印的仪器可选用家用打印机，具有低成本，制备方法简捷的优点。(1) The method used for depositing the conductive layer of the present invention is inkjet printing, and the solvent used is a common, cheap, and low-toxic organic solvent, which has the advantages of environmental protection and low cost compared with traditional etching methods and vapor deposition methods. At the same time, a home printer can be selected as the instrument for inkjet printing, which has the advantages of low cost and simple preparation method.
(2)本发明获得的纳米纤维素纸基触控传感器具有高透明度，且整体性质类似普通纸、易于折叠弯曲，便于与其他柔性电子器件进行集成，应用于触摸显示领域。(2) The nanocellulose paper-based touch sensor obtained by the present invention has high transparency, and the overall properties are similar to ordinary paper, easy to be folded and bent, easy to be integrated with other flexible electronic devices, and applied in the field of touch display.
(3)本发明获得的纳米纤维素纸基触控传感器可直接回收利用，纳米纤维素纸基底环境友好，可完全溶解于水中。PEDOT:PSS导电层生物兼容性好，可完全溶解于水中。将所得纳米纤维素纸基触控传感器溶于水中，经过搅拌后可得到纳米纤维素水分散液，将溶液进行真空抽滤可以再次得到纳米纤维素透明纸。PEDOT:PSS导电层用量很少，溶解后不会影响纳米纤维素成膜。(3) The nanocellulose paper-based touch sensor obtained by the present invention can be directly recycled, and the nanocellulose paper substrate is environmentally friendly and can be completely dissolved in water. PEDOT:PSS conductive layer has good biocompatibility and can be completely dissolved in water. The obtained nanocellulose paper-based touch sensor is dissolved in water, and after stirring, an aqueous nanocellulose dispersion can be obtained, and the solution is vacuum filtered to obtain nanocellulose transparent paper again. The amount of PEDOT:PSS conductive layer is very small, and it will not affect the nanocellulose film formation after dissolution.
(4)本发明获得的纳米纤维素纸基触控传感器可应用于LED灯的触控开关，触控灵敏度良好，同时具有耐磨、耐弯曲、高强度和便于加工的特点。(4) The nanocellulose paper-based touch sensor obtained by the present invention can be applied to touch switches of LED lamps, has good touch sensitivity, and has the characteristics of wear resistance, bending resistance, high strength and easy processing.
附图说明Description of drawings
图1为实施例1制备的纳米纤维素纸基触控传感器的实物图。FIG. 1 is a physical diagram of the nanocellulose paper-based touch sensor prepared in Example 1. FIG.
图2为实施例2制备的纳米纤维素纸基触控传感器的电阻随打印次数变化的曲线图。FIG. 2 is a graph showing the resistance of the nanocellulose paper-based touch sensor prepared in Example 2 as a function of printing times.
图3为纳米纤维素纸基触控传感器与Arduino开发板接通，作为LED灯的触控开关的应用效果图。Figure 3 shows the application effect of the nanocellulose paper-based touch sensor connected to the Arduino development board as a touch switch for LED lights.
具体实施方式Detailed ways
下面结合实施例和附图对本发明作进一步详细的说明，但本发明的实施方式不限于此。对于未特别注明的工艺参数，可参照常规技术进行。The present invention will be described in further detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto. For unspecified process parameters, it can be carried out with reference to conventional techniques.
下列实施例采用的PEDOT:PSS溶液的型号为CleviosPJetNV2(Heraeus公司)The model of the PEDOT:PSS solution used in the following examples is CleviosPJetNV2 (Heraeus Company)
实施例1Example 1
本实施例提供一种纳米纤维素纸基触控传感器及其制备方法。This embodiment provides a nanocellulose paper-based touch sensor and a preparation method thereof.
制备方法包括如下步骤：The preparation method includes the following steps:
A.纳米纤维素透明纸的制备：A. Preparation of nanocellulose transparent paper:
(1)混合打浆：将针叶木浆板粉碎后取40.0g绝干浆料加入2000mL去离子水中混合打浆，使纤维素均匀分散，得到纤维素悬浮液；(1) Mixing and beating: After pulverizing the softwood pulp board, take 40.0 g of dry pulp and add it to 2000 mL of deionized water for mixing and beating, so that the cellulose is uniformly dispersed to obtain a cellulose suspension;
(2)Tempo氧化处理：称取0.48g Tempo，加入300mL去离子水，搅拌至均匀，倒入纤维素悬浮液中，搅拌30min，再称取溴化钠3.2g，加入200mL去离子水，搅拌至均匀，倒入纤维素悬浮液中，搅拌15min，然后取244mL浓度为0.66mol/L的次氯酸钠溶液，在1min内缓慢滴加至纤维素悬浮液中，最后加入1256mL去离子水，控制反应溶液中纤维素的浓度为1wt％，加入碳酸钠溶液调节pH值维持在10.0左右，进行氧化反应，从开始加入次氯酸钠开始计时，反应8h，反应过程中持续搅拌；(2) Tempo oxidation treatment: Weigh 0.48g Tempo, add 300mL deionized water, stir until uniform, pour into the cellulose suspension, stir for 30min, then weigh 3.2g of sodium bromide, add 200mL deionized water, stir To uniformity, pour it into the cellulose suspension, stir for 15min, then take 244mL of sodium hypochlorite solution with a concentration of 0.66mol/L, slowly drop it into the cellulose suspension within 1min, and finally add 1256mL of deionized water to control the reaction solution. The concentration of cellulose in the medium is 1 wt%, and sodium carbonate solution is added to adjust the pH value to maintain at about 10.0, and the oxidation reaction is carried out. The time is started from the beginning of adding sodium hypochlorite, and the reaction is carried out for 8 hours. During the reaction, stirring is continued;
(3)停止反应：反应完毕后加入200mL无水乙醇，搅拌30min停止反应，加入0.5mol/L盐酸调节pH至7.0；(3) Stop the reaction: add 200 mL of absolute ethanol after the reaction is completed, stir for 30 min to stop the reaction, and add 0.5 mol/L hydrochloric acid to adjust the pH to 7.0;
(4)抽滤洗涤：使用布氏漏斗进行真空抽滤，用去离子水洗涤3次；(4) Suction filtration and washing: use Buchner funnel to carry out vacuum suction filtration, and wash 3 times with deionized water;
(5)高压均质：将Tempo氧化后悬浮液加入去离子水稀释至质量浓度为1％，通过微射流高压均质机对浆料进行高压均质，均质过程重复8次，通过剪切作用使纤维分丝解裂，得到质量分数为1％的纳米纤维素水分散液；(5) High-pressure homogenization: add deionized water to the oxidized Tempo suspension to dilute to a mass concentration of 1%, and perform high-pressure homogenization of the slurry by a micro-jet high-pressure homogenizer. The homogenization process is repeated 8 times. The action makes the fiber filaments split to obtain a nanocellulose aqueous dispersion with a mass fraction of 1%;
(6)流延成膜：称取30mL的纳米纤维素水分散液，在50℃和100W下超声脱泡处理30min，使用滚轴均匀涂覆在玻璃板上，盖上防尘罩，在25℃下干燥72h，得到纳米纤维素纸基。(6) Casting film formation: Weigh 30 mL of nanocellulose aqueous dispersion, ultrasonically defoaming at 50 ° C and 100 W for 30 min, use a roller to evenly coat on a glass plate, cover with a dust cover, and at 25 After drying at ℃ for 72 h, the nanocellulose paper base was obtained.
B.喷墨打印PEDOT:PSS导电层B. Inkjet printing PEDOT:PSS conductive layer
(7)油墨配制：称取PEDOT:PSS溶液3.38g，加入0.038g丙三醇，使溶液中丙三醇的质量分数为1％，加入0.19g二甲基亚砜，使溶液中二甲基亚砜质量分数为5％，加入0.19g曲拉通X-100，使溶液中曲拉通X-100的质量分数为5％，得到油墨，以此提高油墨导电性，对配制好的油墨进行搅拌30min，然后超声处理30min；(7) Ink preparation: Weigh 3.38g of PEDOT:PSS solution, add 0.038g of glycerol to make the mass fraction of glycerol in the solution 1%, add 0.19g of dimethyl sulfoxide to make dimethyl sulfoxide in the solution The mass fraction of sulfoxide is 5%, and 0.19g of Triton X-100 is added to make the mass fraction of Triton X-100 in the solution to be 5% to obtain an ink, thereby improving the conductivity of the ink. Stir for 30min, then sonicate for 30min;
(8)油墨过滤：将所得油墨通过0.45μm醋酸纤维素针头滤器进行过滤，过滤两次以去除大颗粒油墨；(8) Ink filtration: filter the obtained ink through a 0.45 μm cellulose acetate needle filter, and filter twice to remove large particle ink;
(9)喷墨打印：称取5mL油墨通过注射器注入到打印机黑色墨盒中，通过CAD绘制的梳状电路图像将PEDOT:PSS喷墨打印至纳米纤维素纸基表面形成梳状电极，喷墨打印过程重复15次，以提高导电性。(9) Inkjet printing: Weigh 5mL of ink and inject it into the black ink cartridge of the printer through a syringe. The PEDOT:PSS is inkjet printed on the surface of the nanocellulose paper base through the comb-shaped circuit image drawn by CAD to form a comb-shaped electrode. The process was repeated 15 times to increase the conductivity.
(10)退火处理：将喷墨打印后的纳米纤维素纸置于烘箱中，80℃下退火处理1h，降低导电层电阻，即得到所述的纳米纤维素纸基触控传感器。(10) Annealing treatment: The inkjet-printed nanocellulose paper was placed in an oven, and annealed at 80° C. for 1 h to reduce the resistance of the conductive layer, thereby obtaining the nanocellulose paper-based touch sensor.
测量导电电极两端电阻，取三次测量结果的平均值，为110.43kΩ。应用于LED灯的触控开关，触控灵敏度良好。Measure the resistance at both ends of the conductive electrode, and take the average value of the three measurement results, which is 110.43kΩ. The touch switch applied to LED lights has good touch sensitivity.
实施例2Example 2
本实施例提供一种纳米纤维素纸基触控传感器及其制备方法。This embodiment provides a nanocellulose paper-based touch sensor and a preparation method thereof.
制备方法包括如下步骤：The preparation method includes the following steps:
A.纳米纤维素透明纸的制备：A. Preparation of nanocellulose transparent paper:
(1)混合打浆：将阔叶木浆片粉碎后取40.0g绝干浆料加入2000mL去离子水中混合打浆，使纤维素均匀分散，得到纤维素悬浮液；(1) Mixing and beating: After pulverizing the hardwood pulp pieces, take 40.0 g of dry pulp and add it to 2000 mL of deionized water for mixing and beating, so that the cellulose is uniformly dispersed to obtain a cellulose suspension;
(2)Tempo氧化处理：称取0.64g Tempo，加入300mL去离子水，搅拌至均匀，倒入纤维素悬浮液中，搅拌30min，再称取溴化钠4.12g，加入200mL去离子水，搅拌至均匀，倒入纤维素悬浮液中，搅拌15min，然后取320mL浓度为0.66mol/L的次氯酸钠溶液，在1min内缓慢滴加至纤维素悬浮液中，最后加入816mL去离子水，控制反应溶液中纤维素的浓度为1.1wt％，加入碳酸氢钠溶液调节pH值维持在10.0左右，进行氧化反应，从开始加入次氯酸钠开始计时，反应8h，反应过程中持续搅拌；(2) Tempo oxidation treatment: Weigh 0.64g Tempo, add 300mL deionized water, stir until uniform, pour into the cellulose suspension, stir for 30min, then weigh 4.12g of sodium bromide, add 200mL deionized water, stir To uniformity, pour it into the cellulose suspension, stir for 15min, then take 320mL of sodium hypochlorite solution with a concentration of 0.66mol/L, slowly drop it into the cellulose suspension within 1min, and finally add 816mL of deionized water to control the reaction solution. The concentration of cellulose in the medium is 1.1 wt%, and sodium bicarbonate solution is added to adjust the pH value to maintain at about 10.0, and the oxidation reaction is carried out. The time is started from the beginning of adding sodium hypochlorite, and the reaction is carried out for 8 hours, and the stirring is continued during the reaction process;
(3)停止反应：反应完毕后加入200mL无水乙醇，搅拌30min停止反应，加入0.5mol/L盐酸调节pH至7.0；(3) Stop the reaction: add 200 mL of absolute ethanol after the reaction is completed, stir for 30 min to stop the reaction, and add 0.5 mol/L hydrochloric acid to adjust the pH to 7.0;
(4)抽滤洗涤：使用布氏漏斗进行真空抽滤，用去离子水洗涤5次；(4) Suction filtration and washing: use Buchner funnel to carry out vacuum suction filtration, and wash 5 times with deionized water;
(5)高压均质：将Tempo氧化后悬浮液加入去离子水稀释至质量浓度为1％，通过微射流高压均质机对浆料进行高压均质，均质过程重复8次，通过剪切作用使纤维分丝解裂，得到质量分数为1％的纳米纤维素水分散液；(5) High-pressure homogenization: add deionized water to the oxidized Tempo suspension to dilute to a mass concentration of 1%, and perform high-pressure homogenization of the slurry by a micro-jet high-pressure homogenizer. The homogenization process is repeated 8 times. The action makes the fiber filaments split to obtain a nanocellulose aqueous dispersion with a mass fraction of 1%;
(6)流延成膜：称取30mL的纳米纤维素水分散液，在60℃和80W下超声脱泡处理60min，使用滚轴均匀涂覆在玻璃板上，盖上防尘罩，在25℃下干燥72h，得到纳米纤维素纸基。(6) Casting film formation: Weigh 30 mL of nanocellulose aqueous dispersion, ultrasonically defoaming at 60 ° C and 80 W for 60 min, use a roller to evenly coat the glass plate, cover with a dust cover, and at 25 After drying at ℃ for 72 h, the nanocellulose paper base was obtained.
B.喷墨打印PEDOT:PSS导电层B. Inkjet printing PEDOT:PSS conductive layer
(7)油墨配制：称取PEDOT:PSS溶液2g，加入0.14g丙三醇，使溶液中丙三醇的质量分数为6％，加入0.11g二甲基亚砜，使溶液中二甲基亚砜质量分数为5％，得到油墨，以此提高油墨导电性，对配制好的油墨进行搅拌30min，然后超声处理30min；(7) Ink preparation: Weigh 2 g of PEDOT:PSS solution, add 0.14 g of glycerol to make the mass fraction of glycerol in the solution 6%, and add 0.11 g of dimethyl sulfoxide to make the dimethyl sulfoxide in the solution The mass fraction of sulfone is 5% to obtain ink, so as to improve the conductivity of the ink, the prepared ink is stirred for 30 minutes, and then ultrasonically treated for 30 minutes;
(8)油墨过滤：将所得油墨通过0.45μm醋酸纤维素针头滤器进行过滤，过滤两次以去除大颗粒油墨；(8) Ink filtration: filter the obtained ink through a 0.45 μm cellulose acetate needle filter, and filter twice to remove large particle ink;
(9)喷墨打印：称取5mL油墨通过注射器注入到打印机黑色墨盒中，通过CAD绘制的梳状电路图像将PEDOT:PSS喷墨打印至纳米纤维素纸基表面形成梳状电极，喷墨打印过程重复15次，以提高导电性；(9) Inkjet printing: Weigh 5mL of ink and inject it into the black ink cartridge of the printer through a syringe. The PEDOT:PSS is inkjet printed on the surface of the nanocellulose paper base through the comb-shaped circuit image drawn by CAD to form a comb-shaped electrode. The process was repeated 15 times to improve conductivity;
(10)退火处理：将喷墨打印后的纳米纤维素纸置于烘箱中，80℃下退火处理1h，降低导电层电阻，即得到所述的纳米纤维素纸基触控传感器。(10) Annealing treatment: The inkjet-printed nanocellulose paper was placed in an oven, and annealed at 80° C. for 1 h to reduce the resistance of the conductive layer, thereby obtaining the nanocellulose paper-based touch sensor.
测量导电电极两端电阻，取三次测量结果的平均值，为26.16kΩ。应用于LED灯的触控开关，触控灵敏度良好。Measure the resistance at both ends of the conductive electrode, and take the average value of the three measurement results, which is 26.16kΩ. The touch switch applied to LED lights has good touch sensitivity.
实施例3Example 3
本实施例提供一种纳米纤维素纸基触控传感器及其制备方法。This embodiment provides a nanocellulose paper-based touch sensor and a preparation method thereof.
制备方法包括如下步骤：The preparation method includes the following steps:
A.纳米纤维素透明纸的制备：A. Preparation of nanocellulose transparent paper:
(1)混合打浆：将棉浆板粉碎后取40.0g绝干浆料加入2000mL去离子水中混合打浆，使纤维素均匀分散，得到纤维素悬浮液；(1) Mixing and beating: After pulverizing the cotton pulp board, take 40.0 g of dry pulp and add it to 2000 mL of deionized water for mixing and beating, so that the cellulose is evenly dispersed to obtain a cellulose suspension;
(2)Tempo氧化处理：称取0.8g Tempo，加入300mL去离子水，搅拌至均匀，倒入纤维素悬浮液中，搅拌30min，再称取溴化钠4.8g，加入200mL去离子水，搅拌至均匀，倒入纤维素悬浮液中，搅拌15min，然后取431mL浓度为0.66mol/L的次氯酸钠溶液，在1min内缓慢滴加至纤维素悬浮液中，最后加入402mL去离子水，控制反应溶液中纤维素的浓度为1.2wt％，氢氧化钠溶液调节pH值维持在10.0左右，进行氧化反应，从开始加入次氯酸钠开始计时，反应8h，反应过程中持续搅拌；(2) Tempo oxidation treatment: Weigh 0.8g of Tempo, add 300mL of deionized water, stir until uniform, pour into the cellulose suspension, stir for 30min, then weigh 4.8g of sodium bromide, add 200mL of deionized water, stir To uniformity, pour it into the cellulose suspension, stir for 15min, then take 431mL of sodium hypochlorite solution with a concentration of 0.66mol/L, slowly drop it into the cellulose suspension within 1min, and finally add 402mL of deionized water to control the reaction solution. The concentration of cellulose in the medium is 1.2 wt%, and the pH value of the sodium hydroxide solution is adjusted to maintain at about 10.0, and the oxidation reaction is carried out. The time is started from the beginning of adding sodium hypochlorite, and the reaction is performed for 8 hours, and the reaction is continuously stirred;
(3)停止反应：反应完毕后加入200mL无水乙醇，搅拌30min停止反应，加入0.5mol/L醋酸调节pH至7.0；(3) Stop the reaction: add 200 mL of absolute ethanol after the reaction is completed, stir for 30 min to stop the reaction, and add 0.5 mol/L acetic acid to adjust the pH to 7.0;
(4)抽滤洗涤：使用布氏漏斗进行真空抽滤，用去离子水洗涤5次；(4) Suction filtration and washing: use Buchner funnel to carry out vacuum suction filtration, and wash 5 times with deionized water;
(5)高压均质：将Tempo氧化后悬浮液加入去离子水稀释至质量浓度为1％，通过微射流高压均质机对浆料进行高压均质，在50MPa下均质过程重复10次，通过剪切作用使纤维分丝解裂，得到质量分数为1％的纳米纤维素水分散液；(5) High-pressure homogenization: add deionized water to the Tempo oxidized suspension to dilute to a mass concentration of 1%, perform high-pressure homogenization on the slurry by a micro-jet high-pressure homogenizer, and repeat the homogenization process 10 times at 50 MPa, The fibers are split by shearing to obtain an aqueous nanocellulose dispersion with a mass fraction of 1%;
(6)流延成膜：称取30mL的纳米纤维素水分散液，在55℃和90W下超声脱泡处理40min，使用滚轴均匀涂覆在玻璃板上，盖上防尘罩，在25℃下干燥72h，得到纳米纤维素纸基。(6) Casting film formation: Weigh 30 mL of nanocellulose aqueous dispersion, ultrasonically defoaming at 55 ° C and 90 W for 40 min, use a roller to evenly coat the glass plate, cover with a dust cover, and at 25 After drying at ℃ for 72 h, the nanocellulose paper base was obtained.
B.喷墨打印PEDOT:PSS导电层B. Inkjet printing PEDOT:PSS conductive layer
(7)油墨配制：称取PEDOT:PSS溶液2g，加入0.11g二甲基亚砜，使溶液中二甲基亚砜质量分数为5％，加入0.11g丙三醇，使溶液中丙三醇的质量分数为5％，配制10mL对甲苯磺酸水溶液(质量浓度为50％)，在溶液中缓慢滴加0.03g对甲苯磺酸水溶液，得到油墨，以此提高油墨导电性，对配制好的油墨进行搅拌30min，然后超声处理30min；(7) Ink preparation: Weigh 2 g of PEDOT:PSS solution, add 0.11 g of dimethyl sulfoxide to make the mass fraction of dimethyl sulfoxide in the solution 5%, and add 0.11 g of glycerol to make glycerol in the solution The mass fraction of toluene sulfonic acid is 5%, prepare 10mL of p-toluenesulfonic acid aqueous solution (mass concentration is 50%), slowly add 0.03g of p-toluenesulfonic acid aqueous solution dropwise in the solution to obtain ink, so as to improve the conductivity of the ink. The ink is stirred for 30min, and then ultrasonically treated for 30min;
(8)油墨过滤：将所得油墨通过0.45μm醋酸纤维素针头滤器进行过滤，过滤两次以去除大颗粒油墨；(8) Ink filtration: filter the obtained ink through a 0.45 μm cellulose acetate needle filter, and filter twice to remove large particle ink;
(9)喷墨打印：称取5mL油墨通过注射器注入到打印机黑色墨盒中，通过CAD绘制的梳状电路图像将PEDOT:PSS喷墨打印至纳米纤维素纸基表面形成梳状电极，喷墨打印过程重复10次，以提高导电性；(9) Inkjet printing: Weigh 5mL of ink and inject it into the black ink cartridge of the printer through a syringe. The PEDOT:PSS is inkjet printed on the surface of the nanocellulose paper base through the comb-shaped circuit image drawn by CAD to form a comb-shaped electrode. The process was repeated 10 times to improve conductivity;
(10)退火处理：将喷墨打印后的纳米纤维素纸置于烘箱中，100℃下退火处理30min，降低导电层电阻，即得到所述的纳米纤维素纸基触控传感器。(10) Annealing treatment: The inkjet-printed nanocellulose paper was placed in an oven, and annealed at 100° C. for 30 minutes to reduce the resistance of the conductive layer, thereby obtaining the nanocellulose paper-based touch sensor.
测量导电电极两端电阻，取三次测量结果的平均值，为57.62kΩ。应用于LED灯的触控开关，触控灵敏度良好。Measure the resistance at both ends of the conductive electrode, and take the average value of the three measurement results, which is 57.62kΩ. The touch switch applied to LED lights has good touch sensitivity.
实施例4Example 4
本实施例提供一种纳米纤维素纸基触控传感器及其制备方法。This embodiment provides a nanocellulose paper-based touch sensor and a preparation method thereof.
制备方法包括如下步骤：The preparation method includes the following steps:
A.纳米纤维素透明纸的制备：A. Preparation of nanocellulose transparent paper:
(1)混合打浆：将竹浆板粉碎后取40.0g绝干浆料加入2000mL去离子水中混合打浆，使纤维素均匀分散，得到纤维素悬浮液；(1) Mixing and beating: after pulverizing the bamboo pulp board, take 40.0 g of dry pulp and add it to 2000 mL of deionized water for mixing and beating, so that the cellulose is evenly dispersed to obtain a cellulose suspension;
(2)Tempo氧化处理：称取0.48g Tempo，加入300mL去离子水，搅拌至均匀，倒入纤维素悬浮液中，搅拌30min，再称取溴化钠4.8g，加入200mL去离子水，搅拌至均匀，倒入纤维素悬浮液中，搅拌15min，然后取320mL浓度为0.66mol/L的次氯酸钠溶液，在1min内缓慢滴加至纤维素悬浮液中，最后加入256mL去离子水，控制反应溶液中纤维素的浓度为1.3wt％，加入碳酸钠溶液调节pH值维持在10.0左右，进行氧化反应，从开始加入次氯酸钠开始计时，反应6h，反应过程中持续搅拌；(2) Tempo oxidation treatment: Weigh 0.48g of Tempo, add 300mL of deionized water, stir until uniform, pour into the cellulose suspension, stir for 30min, then weigh 4.8g of sodium bromide, add 200mL of deionized water, stir To uniformity, pour it into the cellulose suspension, stir for 15min, then take 320mL of sodium hypochlorite solution with a concentration of 0.66mol/L, slowly drop it into the cellulose suspension within 1min, and finally add 256mL of deionized water to control the reaction solution. The concentration of cellulose in the medium is 1.3 wt%, and sodium carbonate solution is added to adjust the pH value to maintain at about 10.0, and the oxidation reaction is carried out. The time is started from the beginning of adding sodium hypochlorite, and the reaction is carried out for 6 hours. During the reaction, stirring is continued;
(3)停止反应：反应完毕后加入200mL无水乙醇，搅拌30min停止反应，加入0.5mol/L磷酸调节pH至7.0；(3) Stop the reaction: add 200 mL of absolute ethanol after the reaction is completed, stir for 30 min to stop the reaction, and add 0.5 mol/L phosphoric acid to adjust the pH to 7.0;
(4)抽滤洗涤：使用布氏漏斗进行真空抽滤，用去离子水洗涤4次；(4) Suction filtration washing: use Buchner funnel to carry out vacuum suction filtration, and wash 4 times with deionized water;
(5)高压均质：将Tempo氧化后悬浮液加入去离子水稀释至质量浓度为1.8％，通过微射流高压均质机对浆料进行高压均质，在100MPa下均质过程重复4次，通过剪切作用使纤维分丝解裂，得到质量分数为1.8％的纳米纤维素水分散液；(5) High-pressure homogenization: add deionized water to the oxidized suspension of Tempo to dilute to a mass concentration of 1.8%, perform high-pressure homogenization on the slurry by a micro-jet high-pressure homogenizer, and repeat the homogenization process 4 times at 100 MPa, The fibers were split by shearing to obtain a nanocellulose aqueous dispersion with a mass fraction of 1.8%;
(6)流延成膜：称取30mL的纳米纤维素水分散液，在50℃和100W下超声脱泡处理30min，使用滚轴均匀涂覆在玻璃板上，盖上防尘罩，在25℃下干燥72h，得到纳米纤维素纸基。(6) Casting film formation: Weigh 30 mL of nanocellulose aqueous dispersion, ultrasonically defoaming at 50 ° C and 100 W for 30 min, use a roller to evenly coat on a glass plate, cover with a dust cover, and at 25 After drying at ℃ for 72 h, the nanocellulose paper base was obtained.
B.喷墨打印PEDOT:PSS导电层B. Inkjet printing PEDOT:PSS conductive layer
(7)油墨配制：称取PEDOT:PSS溶液2g，加入0.14g乙二醇，使溶液中乙二醇的质量分数为6％，加入0.11g二甲基亚砜，使溶液中二甲基亚砜质量分数为5％，得到油墨，以此提高油墨导电性，对配制好的油墨进行搅拌30min，然后超声处理30min；(7) Ink preparation: Weigh 2 g of PEDOT:PSS solution, add 0.14 g of ethylene glycol to make the mass fraction of ethylene glycol in the solution 6%, and add 0.11 g of dimethyl sulfoxide to make the dimethyl sulfoxide in the solution The mass fraction of sulfone is 5% to obtain ink, so as to improve the conductivity of the ink, the prepared ink is stirred for 30 minutes, and then ultrasonically treated for 30 minutes;
(8)油墨过滤：将所得油墨通过0.45μm醋酸纤维素针头滤器进行过滤，过滤两次以去除大颗粒油墨；(8) Ink filtration: filter the obtained ink through a 0.45 μm cellulose acetate needle filter, and filter twice to remove large particle ink;
(9)喷墨打印：称取5mL油墨通过注射器注入到打印机黑色墨盒中，通过CAD绘制的梳状电路图像将PEDOT:PSS喷墨打印至纳米纤维素纸基表面形成梳状电极，喷墨打印过程重复5次，以提高导电性；(9) Inkjet printing: Weigh 5mL of ink and inject it into the black ink cartridge of the printer through a syringe. The PEDOT:PSS is inkjet printed on the surface of the nanocellulose paper base through the comb-shaped circuit image drawn by CAD to form a comb-shaped electrode. The process was repeated 5 times to improve conductivity;
(10)退火处理：将喷墨打印后的纳米纤维素纸置于烘箱中，90℃下退火处理40min，降低导电层电阻，即得到所述的纳米纤维素纸基触控传感器。(10) Annealing treatment: The inkjet-printed nanocellulose paper is placed in an oven, and annealed at 90° C. for 40 minutes to reduce the resistance of the conductive layer, thereby obtaining the nanocellulose paper-based touch sensor.
测量导电电极两端电阻，取三次测量结果的平均值，为265.38kΩ。应用于LED灯的触控开关，触控灵敏度良好。Measure the resistance at both ends of the conductive electrode, and take the average value of the three measurement results, which is 265.38kΩ. The touch switch applied to LED lights has good touch sensitivity.
实施例5Example 5
本实施例提供一种纳米纤维素纸基触控传感器及其制备方法。This embodiment provides a nanocellulose paper-based touch sensor and a preparation method thereof.
制备方法包括如下步骤：The preparation method includes the following steps:
A.纳米纤维素透明纸的制备：A. Preparation of nanocellulose transparent paper:
(1)混合打浆：将秸秆桨板粉碎后取40.0g绝干浆料加入2000mL去离子水中混合打浆，使纤维素均匀分散，得到纤维素悬浮液；(1) Mixing and beating: After crushing the straw paddle, take 40.0 g of dry pulp and add it to 2000 mL of deionized water for mixing and beating, so that the cellulose is evenly dispersed to obtain a cellulose suspension;
(2)Tempo氧化处理：称取0.8g Tempo，加入300mL去离子水，搅拌至均匀，倒入纤维素悬浮液中，搅拌30min，再称取溴化钠4.12g，加入200mL去离子水，搅拌至均匀，倒入纤维素悬浮液中，搅拌15min，然后取320mL浓度为0.66mol/L的次氯酸钠溶液，在1min内缓慢滴加至纤维素悬浮液中，最后加入153mL去离子水，控制反应溶液中纤维素的浓度为1.5wt％，加入碳酸氢钠溶液调节pH值维持在10.0左右，进行氧化反应，从开始加入次氯酸钠开始计时，反应4h，反应过程中持续搅拌；(2) Tempo oxidation treatment: Weigh 0.8g of Tempo, add 300mL of deionized water, stir until uniform, pour it into the cellulose suspension, stir for 30min, then weigh 4.12g of sodium bromide, add 200mL of deionized water, stir To uniformity, pour it into the cellulose suspension, stir for 15min, then take 320mL of sodium hypochlorite solution with a concentration of 0.66mol/L, slowly drop it into the cellulose suspension within 1min, and finally add 153mL of deionized water to control the reaction solution. The concentration of cellulose in the medium is 1.5 wt%, and sodium bicarbonate solution is added to adjust the pH value to maintain at about 10.0, and the oxidation reaction is carried out. The time is started from the beginning of adding sodium hypochlorite, and the reaction is continued for 4 hours. During the reaction, stirring is continued;
(3)停止反应：反应完毕后加入200mL无水乙醇，搅拌30min停止反应，加入0.5mol/L盐酸调节pH至7.0；(3) Stop the reaction: add 200 mL of absolute ethanol after the reaction is completed, stir for 30 min to stop the reaction, and add 0.5 mol/L hydrochloric acid to adjust the pH to 7.0;
(4)抽滤洗涤：使用布氏漏斗进行真空抽滤，用去离子水洗涤5次；(4) Suction filtration and washing: use Buchner funnel to carry out vacuum suction filtration, and wash 5 times with deionized water;
(5)高压均质：将Tempo氧化后悬浮液加入去离子水稀释至质量浓度为1.4％，通过微射流高压均质机对浆料进行高压均质，在75MPa下均质过程重复8次，通过剪切作用使纤维分丝解裂，得到质量分数为1.4％的纳米纤维素水分散液；(5) High-pressure homogenization: add deionized water to the Tempo oxidized suspension to dilute to a mass concentration of 1.4%, perform high-pressure homogenization on the slurry by a micro-jet high-pressure homogenizer, and repeat the homogenization process 8 times at 75MPa, The fibers were split by shearing to obtain a nanocellulose aqueous dispersion with a mass fraction of 1.4%;
(6)流延成膜：称取30mL的纳米纤维素水分散液，在50℃和100W下超声脱泡处理30min，使用滚轴均匀涂覆在玻璃板上，盖上防尘罩，在25℃下干燥72h，得到纳米纤维素纸基。(6) Casting film formation: Weigh 30 mL of nanocellulose aqueous dispersion, ultrasonically defoaming at 50 ° C and 100 W for 30 min, use a roller to evenly coat on a glass plate, cover with a dust cover, and at 25 After drying at ℃ for 72 h, the nanocellulose paper base was obtained.
B.喷墨打印PEDOT:PSS导电层B. Inkjet printing PEDOT:PSS conductive layer
(7)油墨配制：称取PEDOT:PSS溶液3.38g，加入0.038g丙三醇，使丙三醇的质量分数为1％，加入0.19g二甲基亚砜，使二甲基亚砜质量分数为5％，得到油墨，以此提高油墨导电性，对配制好的油墨进行搅拌30min，然后超声处理30min；(7) Ink preparation: Weigh 3.38g of PEDOT:PSS solution, add 0.038g of glycerol to make the mass fraction of glycerol 1%, add 0.19g of dimethyl sulfoxide to make the mass fraction of dimethyl sulfoxide is 5% to obtain ink, thereby improving the conductivity of the ink, stirring the prepared ink for 30 minutes, and then ultrasonically treating it for 30 minutes;
(8)油墨过滤：将所得油墨通过0.45μm醋酸纤维素针头滤器进行过滤，过滤两次以去除大颗粒油墨；(8) Ink filtration: filter the obtained ink through a 0.45 μm cellulose acetate needle filter, and filter twice to remove large particle ink;
(9)喷墨打印：称取5mL油墨通过注射器注入到打印机黑色墨盒中，通过CAD绘制的梳状电路图像将PEDOT:PSS喷墨打印至纳米纤维素纸基表面形成梳状电极，喷墨打印过程重复15次，以提高导电性；(9) Inkjet printing: Weigh 5mL of ink and inject it into the black ink cartridge of the printer through a syringe. The PEDOT:PSS is inkjet printed on the surface of the nanocellulose paper base through the comb-shaped circuit image drawn by CAD to form a comb-shaped electrode. The process was repeated 15 times to improve conductivity;
(10)退火处理：将喷墨打印后的纳米纤维素纸置于烘箱中，80℃下退火处理1h，降低导电层电阻，即得到所述的纳米纤维素纸基触控传感器。(10) Annealing treatment: The inkjet-printed nanocellulose paper was placed in an oven, and annealed at 80° C. for 1 h to reduce the resistance of the conductive layer, thereby obtaining the nanocellulose paper-based touch sensor.
测量导电电极两端电阻，取三次测量结果的平均值，为97.20kΩ。应用于LED灯的触控开关，触控灵敏度良好。Measure the resistance at both ends of the conductive electrode, and take the average value of the three measurement results, which is 97.20kΩ. The touch switch applied to LED lights has good touch sensitivity.
表1为实施例1～5制备的纳米纤维素纸基传感器两端电阻的比较，从表中可以看出，通过实施例2制备的纳米纤维素纸基传感器导电性能最好。Table 1 is a comparison of the resistances at both ends of the nanocellulose paper-based sensors prepared in Examples 1 to 5. It can be seen from the table that the nanocellulose paper-based sensor prepared in Example 2 has the best conductivity.
表1不同油墨配方获得纳米纤维素纸基传感器的两端电阻对比Table 1 Comparison of two-terminal resistances of nanocellulose paper-based sensors obtained with different ink formulations
上述实施例为本发明较佳的实施方式，但本发明的实施方式并不受上述实施例的限制，其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above-mentioned embodiments, and any other changes, modifications, substitutions, combinations, The simplification should be equivalent replacement manners, which are all included in the protection scope of the present invention.
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| CN201910238425.9ACN109992169A (en) | 2019-03-27 | 2019-03-27 | A nanocellulose paper-based touch sensor and its preparation method and application |
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