硝酸银复合薄膜的制备及性能研究.pdf

塑料工业
第43卷第5期
118
CHINA PLASTICS INDUSTRY
2015年5月
热致变导电聚乙烯叱咯烷酮/硝酸银复合薄膜的
制备及性能研究
甘勇',白时兵'',王琪,项伟,胡守亮,赵翔,李悦芳
(1.高分子材料国家工程国家重点实验室,四川大学高分子研究所,四川成都610065;
2.中国工程物理研究院电子工程研究所,四绵阳621900
摘要:以聚乙烯毗咯烷酮(PVP)和硝酸银(AgNO3)为原料,通过溶液成膜法制备了在固相具有热致变性能的
导电PVP/AgNO3复合薄膜。通过热失重分析、差示扫描量热仪、扫描电子显微镜、X射线能谱(EDS)、X射线衍射
等方法表征了薄膜热性能和热处理后薄膜表面形貌和结构。结果表明,PVP/AgNO3复合薄膜在208℃呈现出一个放热
峰和18%的质量损失,通过热处理法在固相中制备出了单质银,银粒子为球状颗粒。由于大量银粒子生成,PVP/A
NO3复合薄膜表现出独特的电阻率一温度特性,即薄膜的表面电阻率在205~225℃突然下降5个数量级。与传统的液
相化学还原法相比,热处理法无需加入还原剂和有机溶剂,在固相中还原制备纳米银,工艺简单、环保,且可制备具
有热致变导电功能的器件。
关键词:热致变导电;热处理;固相;聚乙烯吡咯烷酮;硝酸银
DOL:10.39069/j,issn_1005-5770.2015.05.030
中图分类号:TQ325.1
文献标识码:A
文章编号:1005-5770(2015)05-0118-04
Preparation and Properties of Thermal-electrical Poly vinylpyrrolidone/Silver
Nitrate Composite Film
AN Yong BAL Shi-bing, WANG Qi, XIANG Wei, HU Shou-liang, ZHAO Xiang, LI Yue-fang
(1. State Key Laboratory of Polymer Malerials Engineering of China, Polymer Research Institute of Sichuan University
Chengdu 610065, China
Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, China)
Abstract In this article, with polyvinylpyrrolidone(PVP and silver nitrate(Agno, )as raw
materials, the PVP/Agno composite film with thermal-electrical property was prepared by solution casting
The thermal properties of PVP/Agno, film and the morphology and structure of the film after heat treatment
were characterized by thermogravimetry analysis, differential scanning calorimeter, scanning electrical
microscopy, X-ray diffractomer and energy dispersive spectrometer. The results showed that, the PVP/
Agno composite film presented an exothermic peak and weight loss of 18% at 208 C, and spherical Ag
particles were generated in the solid state during the heat treatment process. Meanwhile, due to the
generation of a large amount of Ag particles, the PVP/Agno composite film exhibited unique resistivity
temperature characteristic, which meant that the surface electrical resistance value of the film sharply dropped
5 order of magnitude at 205-225 C. Compared with traditional liquid phase chemical reduction, thermal
treatment needed no reductants and organic solvents and nano-silver was prepared by reduction in the solid phase
Moreover, this simple and environmental method can be used to make devices with thermal-electrical property
Keywords Thermal-electrical; Thermal Treatment; Solid Phase Polyvinylpyrrolidone; Silver Nitrale
纳米粒子具有量子尺寸效应、小尺寸效应、表面学、热力学和化学反应等方面的性能り。在聚合物
效应和宏观量子隧道效应因而展现出特殊的光学、电中掺入金属纳米粒子可赋予聚合物材料特殊的性
通信联系人 baishibing(@scu.edu.e
作者简介:甘勇,男,1989年生,硕士研究生,主要研究功能高分子材料。ganong2015@163.com