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One-step aqueous fabrication of a silver nanowire composite transparent conductive film with high uniformity and stability
Journal of Materials Chemistry C ( IF 6.4 ) Pub Date : 2020/02/10 , DOI: 10.1039/c9tc06629b
Kaiqing Wang 1, 2, 3, 4 , Yunxia Jin 1, 2, 3, 4, 5 , Baifan Qian 1, 2, 3, 4 , Jianzhong Wang 1, 2, 3, 4 , Fei Xiao 1, 2, 3, 4
Affiliation  

Silver nanowire (AgNW) networks are promising candidates for the fabrication of transparent conductive films (TCFs), but the introduction of a top protection layer via a two-step method is generally required to improve the stability, adhesion and roughness of the film. Also, the use of organic solvents in the diluted AgNW coating solution poses a serious hazard due to their evaporation in open air. In this study, a one-step solution process based on a water-dispersed hybrid ink was developed to fabricate composite TCFs with comparable performances. This method significantly simplified the fabrication process, and minimized the chemical hazard. An optimized ratio of chitosan–lactic acid (Chi–LaA) was introduced to an AgNW aqueous dispersion to fabricate a composite TCF with good film coating capability and improved stability. A coefficient of variation of less than 0.1 was found for the composite TCF, which is superior to that of up to 0.49 for the pristine film prepared with an aqueous dispersion. As a result, the Chi–LaA/AgNW (0.2 : 1) TCF exhibited enhanced stability, adhesion, and surface flatness. It showed only a 33% increase in sheet resistance after 300 days in ambient conditions and illustrated 6.6 times the lifetime of the pristine AgNW TCF under a current stress of 250 mA cm−2. Furthermore, it sustained 100 times tape adhesion tests and 13 h of solvent ultrasonic vibration without significant change in its conductivity. Film heaters were fabricated with the Chi–LaA/AgNW composite TCFs, achieving a uniform and stable temperature of ∼135 °C at a low voltage of 6 V with a fast heating rate, good repeatability and long lifetime.

中文翻译:

高均匀性和稳定性的一步法水性银纳米线复合透明导电膜的制备

银纳米线(的AgNW)网络是有希望的透明导电膜(TCFs中)的制造中的候选人,但引进了顶部保护层的经由通常需要两步法来改善膜的稳定性,粘附性和粗糙度。同样,在稀释的AgNW涂层溶液中使用有机溶剂会造成严重危害,因为它们会在露天蒸发。在这项研究中,开发了一种基于水分散型混合墨水的一步解决方案,以制造性能相当的复合TCF。这种方法大大简化了制造过程,并最大程度地减少了化学危害。将最佳比例的壳聚糖-乳酸(Chi-LaA)引入到AgNW水分散体中,以制备具有良好膜包衣能力和改善稳定性的复合TCF。对于复合TCF,发现其变异系数小于0.1,这优于用水分散体制备的原始膜的变异系数高达0.49。结果是,Chi-LaA / AgNW(0.2:1)TCF表现出增强的稳定性,附着力和表面平整度。在环境条件下放置300天后,其薄层电阻仅增加了33%,是原始AgNW TCF在250 mA cm电流应力下的寿命的6.6倍。−2。此外,它还进行了100倍的胶带粘合力测试和13小时的溶剂超声振动,而电导率没有明显变化。薄膜加热器是用Chi-LaA / AgNW复合TCF制成的,在6 V的低压下可达到约135°C的均匀且稳定的温度,并具有较快的加热速率,良好的重复性和长寿命。
更新日期:2020-04-03
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