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(Ag NW),用旋涂法将Ag NW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Ag NW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拉伸应力;导电银纳米线直径约60 nm,长度20~30μm。当Ag NW沉积密度超过300 mg/m2时,方块电阻(Rs)低于22.6?/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Rs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Rs略微增大。
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 Ag NW 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 20~30μm in length.When the deposition density of AgNW exceeded 300 mg/m^2,the square resistance Rs of composite conductive film was lower than 22.6?/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 Rs 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 Rs increased slightly with time when the composite film was placed in air.
作者
李禹欣
胡飞
LI Yu-xin;HU Fei(School of Food Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2019年第10期2101-2108,共8页
Fine Chemicals
基金
国家自然科学基金重点项目(U1501214)
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
starch film
silver nanowires
flexible and transparent conductive film
photoelectric properties
electro-organic chemistry and industry
