用接触角法估算复合材料的表(界)面特性  

Estimation of surface and interface properties of composite with contact angle method

作　　者：余钢[1] 王志贤[2] 

机构地区：[1]四川省林业科学研究院,成都市610066 [2]海鸥老人涂料有限公司,深圳市518076

出　　处：《粘接》2000年第5期28-32,共5页Adhesion

摘　　要：采用填料柱法测量了不同表面处理的导电炭黑的接触角 ,并根据联立的粘合理论估算了炭黑填充低密度聚乙烯导电复合材料的表 (界 )面特性参数。实验结果表明 ,硝酸处理使炭黑的表面自由能、界面粘附功有所提高 ,而偶联剂处理则结果相反 ;炭黑表面羧基含量的改变是影响炭黑表 (界 )面性质的主要原因。正是由于炭黑表 (界 )面性质的这种改变 ,从而调节了炭黑 -低密度聚乙烯的界面相互作用 ,导致炭黑在聚乙烯基体中的分散形态发生了相应的变化。The contact angles of carbon black(CB) treated with different methods were measured using filler column method, and the surface and interface parameters of carbon black filled low density polyethylene(LDPE) electrical conductive composites were estimated based on the unified theory of adhesion.The experimental results showed that the surface free energy and interface adhesion work of carbon black treated with nitric acid increased, to some extent whereas decreased treated partly with coupling agents.The variations of oxygen containing functional groups in carbon black surface ([ O C O ]mainly) were the main factors influencing on surface and interface properties of carbon black,which could adjust the CB—LDPE interface interactions, and then result in the change of morphology of carbon black dispersed in LDPE matrix.

关 键 词：炭黑 低密度聚乙烯 接触角 界面 表面特性 填料 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]