碳酸钙基导电复合粉体的制备与性能  

Preparation and property of CaCO_3-SiO_2-PANI conductivity composite powders

作　　者：赵兴[1] 廖其龙[1] 王辅[1] 刘来宝[1] 余洪滔[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《中国粉体技术》2017年第2期93-98,共6页China Powder Science and Technology

基　　金：国家自然科学基金委员会和中国工程物理研究院联合基金项目;编号:U1230105

摘　　要：以正硅酸乙酯(TEOS)为硅源,对碳酸钙进行包覆改性得到CaCO_3-SiO_2,采用原位聚合法制备聚苯胺(PANI)包覆的碳酸钙基导电复合粉体(CaCO_3-SiO_2-PANI);用扫描电子显微镜(SEM)、X射线衍射(XRD)、热重分析(TG)和电阻率测试等手段对样品进行分析表征,探讨CaCO_3-SiO_2复合粉体与苯胺(An)质量比对导电复合粉体形貌、结构和电导率的影响。结果表明:随着m(CaCO_3-SiO_2)∶m(An)从1∶1增加至3∶1,复合导电粉体的电导率从5.6×10^(-2) S·cm^(-1)减小至5.7×10^(-3) S·cm^(-1);质量比为3∶1时,导电复合粉体形貌变化明显,产物中生成少量硫酸钙;聚苯胺包覆不会改变碳酸钙的晶型;该导电复合粉体在温度200℃以下具有良好的耐热性和较高的电导率。Calcium carbonate （CaCO3） was successfully coated by SiO2, then polyaniline （PANI） was in situ polymerized to form a novel CaCO3-SiO2-PANI conductivity composite powders. The samples were characterized by the means of SEM, XRD, TG and resistivity meter, the effects of mass ratio m（CaCO3-SiO2） ： re（An）on the morphology, structure and conductivity of CaCO3-SiO：-PANI powders were studied. Theresults shows that conductivity of CaCO3-SiOjPANI powders decrease from 5.6×10^-2 to 5.7×10^-3 S. cm^-1 with increasing mass ratio m（CaCO3-SiO2）：m（An） from l：l to 3：1. The morphology of CaCO3-SiO2-PANI changes obviously when mass ratio was 3： 1 and CaSO4 formed, coating with PANI did not change the structure of CaCO3. The conductivity composite powders show good heat resistance and excellent conductivity when the temperature below 200 ℃.

关 键 词：导电复合粉体 碳酸钙 形貌 结构 电导率 

分 类 号：TQ110.9[化学工程—无机化工]