Page 135 - 精细化工2019年第10期

第 36 卷第 10 期 精 细 化 工 Vol.36, No.10
2019 年 10 月 FINE CHEMICALS Oct. 2019

有机电化学与工业
淀粉基底银纳米线柔性透明导电膜的合成及性能

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李禹欣，胡 飞
（华南理工大学 食品科学与工程学院，广东 广州 510640）

摘要：以马铃薯淀粉为原料，合成可反复弯曲折叠的柔性透明基底膜，通过多元醇法制备导电银纳米线（AgNW），
用旋涂法将 AgNW 均匀覆盖于淀粉基底膜表面，两者通过分子间作用力相结合，制得系列 AgNW 沉积密度不
同的复合导电薄膜材料。对产品形貌、结构及稳定性进行了分析，并探索了不同 AgNW 沉积密度对复合导电薄
膜材料光电性能的影响规律。结果表明，获取的柔性基底膜具有 92%透光率、3.92 nm 粗糙度、29.01 MPa 拉伸
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应力；导电银纳米线直径约 60 nm，长度 20~30 μm。当 AgNW 沉积密度超过 300 mg/m 时，方块电阻（R s ）低
于 22.6 Ω/sq，透光率低于 65%，光电优值（FOM）高于 35，是氧化铟锡（ITO）导电膜的良好替代材料。将复
合膜反复弯曲折叠 R s 变化量低于 5%，TGA 测试发现，淀粉基底膜及复合膜热分解温度高于 250 ℃，有利于对
其进行进一步高温导电处理；稳定性测试结果表明，复合膜放置于空气中随时间延长 R s 略微增大。
关键词：淀粉膜；银纳米线；柔性透明导电膜；光电性能；有机电化学与工业
中图分类号：TB383.2 文献标识码：A 文章编号：1003-5214 (2019) 10-2101-08

Synthesis and Properties of Starch Substrate Silver Nanowires
Flexible Transparent Conductive Films

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LI Yu-xin, HU Fei
（School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong,
China）

Abstract: A flexible transparent substrate film, which can be repeatedly bent and folded, was synthesized
from potato starch. Subsequently, conductive silver nanowires (AgNW) prepared by polyol method were
coated evenly on the surface of starch film by spin coating to prepare a series of composite conductive films
with different AgNW deposition densities. Herein, the substrate film and AgNW are combined by
intermolecular force. The morphology, structure and stability were analyzed and the influence of AgNW
deposition density on the photoelectric properties of composite conductive films was explored. The results
showed that the obtained starch film had a light transmittance of 92%, a roughness of 3.92 nm, and a tensile
stress of 29.01 MPa. Conductive silver nanowires were 60 nm in diameter and 20~30 μm in length. When
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the deposition density of AgNW exceeded 300 mg/m , the square resistance R s of composite conductive
film was lower than 22.6 Ω/sq, the light transmittance was lower than 65%, and the photoelectric optimal
value (FOM) was higher than 35. Therefore, it is a good substitute material for ITO conductive films. When
the composite film was repeatedly bent and folded, the change of R s was less than 5%. TGA test
demonstrated that the thermal decomposition temperatures of both starch substrate film and composite
conductive film were higher than 250 ℃, which is conducive to further conductive treatment at high
temperature. The stability test results revealed that R s increased slightly with time when the composite film
was placed in air.
Key words: starch film; silver nanowires; flexible and transparent conductive film; photoelectric properties;
electro-organic chemistry and industry

收稿日期：2019-03-25; 定用日期：2019-05-30; DOI: 10.13550/j.jxhg.20190234
基金项目：国家自然科学基金重点项目（U1501214）
作者简介：李禹欣（1995—），女，硕士生，E-mail：1103245148@qq.com。联系人：胡 飞（1972—），男，副教授，E-mail：g95216@163.com。