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纳米银线-环氧树脂复合导电薄膜的制备及其在柔性触控上的应用

Fabrication of AgNWs-epoxy composite film and its application in flexible touch panel

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摘要

纳米银线透明导电薄膜具有优异的光电性能和机械性能,有望取代传统的氧化铟锡材料应用于柔性光电器件中。为解决纳米银线的黏附性、柔韧性和稳定性问题,结合转印法和烷基硫醇修饰法制备了纳米银线-环氧树脂复合导电薄膜。在此过程中,首先应用十八烷基三氯硅烷对转移衬底进行疏水化处理以提升透明电极转印的良率;接着,对转印后的纳米银线进行烷基硫醇分子的自组装修饰,以进一步提升纳米银线透明导电薄膜的稳定性;最后在此基础上制备了柔性投射式电容触控屏。所制备的透明导电薄膜具有优异的综合性能:品质因数约为300(Rs=29.7 Ω/□,T=96.2%);薄膜经过100次胶带测试后,电阻变化小于25%;在1 000次弯曲(弯曲半径为1 mm)测试后,电阻几乎不发生变化;高温高湿下老化一个月,电阻变化小于20%。本文结合转印工艺以及分子修饰技术开发的纳米银线-环氧树脂复合导电薄膜以及柔性触控工艺,有望推广应用至其他柔性电子元件中。

Abstract

Silver nanowires (AgNWs) are regarded as one of the promising alternatives to traditional indium tin oxide as transparent conductive materials because of its outstanding opto-electronic and mechanical performances. In order to improve the adhesion, flexibility and stability of AgNWs films, we proposed a facile transferring and alkanethiolate based self-assembled process to fabricate the AgNWs-epoxy resin (EPR) composite film. Firstly, surface energy of the temporary substrate was modified by trichloro(octadecyl)silane to facilitate the delamination from EPR. Then the AgNWs-EPR composite film was further decorated by methyl-terminated alkanethiolate for better stability. Finally, a flexible projective capacitive touch panel enabling multi-touch was fabricated by this composite film. The AgNWs-EPR composite film capped with alkanethiolate monolayers exhibited comprehensive performance including high FoM of 300 (Rs=29.7 Ω/□, T=96.2%), strong adhesion (Rs/R0<125% for 100 tape test ), ultra-flexibility (sheet resistance remained almost unchanged after 1 000 bending cycles with a bending radius of 1 mm) and strong corrosion resistance (Rs/R0<120% after an accelerated aging test under 85 ℃, 85%RH). We believe this transferring and decorating method for forming AgNWs composite film and the relative techniques for demonstrating flexible touch panel can be popularized to various flexible electronic applications.

Newport宣传-MKS新实验室计划
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中图分类号:O59

DOI:10.3788/yjyxs20183311.0918

所属栏目:材料与器件

基金项目:国家高技术研究发展计划(No. 2015AA033408);国家自然科学基金(No. 61307027)

收稿日期:2018-06-10

修改稿日期:2018-08-21

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许钰旺:中山大学 电子与信息工程学院, 广东省显示材料与技术重点实验室,光电材料与技术国家重点实验室,广东 广州 510006
龚又又:中山大学 电子与信息工程学院, 广东省显示材料与技术重点实验室,光电材料与技术国家重点实验室,广东 广州 510006
王力:中山大学 电子与信息工程学院, 广东省显示材料与技术重点实验室,光电材料与技术国家重点实验室,广东 广州 510006
刘贵师:中山大学 电子与信息工程学院, 广东省显示材料与技术重点实验室,光电材料与技术国家重点实验室,广东 广州 510006
杨柏儒:中山大学 电子与信息工程学院, 广东省显示材料与技术重点实验室,光电材料与技术国家重点实验室,广东 广州 510006

联系人作者:杨柏儒(paulyang68@me.com)

备注:许钰旺(1994-),男,广东揭阳人,硕士研究生,主要从事纳米银线透明导电薄膜、柔性触控方面的研究。E-mail: xuyw3@mail2.sysu.edu.cn

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引用该论文

XU Yu-wang,GONG You-you,WANG Li,LIU Gui-shi,YANG Bo-ru. Fabrication of AgNWs-epoxy composite film and its application in flexible touch panel[J]. Chinese Journal of Liquid Crystals and Displays, 2018, 33(11): 918-924

许钰旺,龚又又,王力,刘贵师,杨柏儒. 纳米银线-环氧树脂复合导电薄膜的制备及其在柔性触控上的应用[J]. 液晶与显示, 2018, 33(11): 918-924

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