HSi-g-A151的制备及其对纳米Si3N4的表面改性  

Surface modification of nano-Si_3N_4 with HSi-g-A151

作　　者：桂君[1] 钱家盛[1] 魏强[1] 章于川[1] 

机构地区：[1]安徽大学化学化工学院,安徽省绿色高分子材料实验室,安徽合肥230039

出　　处：《安徽大学学报（自然科学版）》2011年第1期79-84,共6页Journal of Anhui University(Natural Science Edition)

基　　金：国家支撑计划课题资助项目(2007BAE22B02,2007BAE22B01)

摘　　要：通过甲基含氢硅油与乙烯基硅氧烷(A151)的接枝反应,制备大分子硅氧烷偶联剂(HSi-g-A151),并用其对纳米Si3N4粉体进行表面修饰,通过沉降实验、透射电镜分析、粒度测定、热重分析和表面自由能分析等手段对改性前后的粉体进行表征.结果表明:大分子硅烷偶联剂对纳米Si3N4粉体为化学改性,改性后的纳米Si3N4粉体在二甲苯中悬浮稳定,粒径分布在30 nm左右,纳米颗粒表面自由能由79.8 J.m-2下降到39.4 J.m-2.By the graft reaction of methyl hydrogen silicone oil with vinyl siloxane（A151）,the macromolecular silane coupling agent（HSi-g-A151） was prepared,and the surface of nano-Si3N4 was modified with it.The properties of modified and unmodified nano-Si3N4 were investigated by depositing sediment,FT-IR,TEM,particle size distribution,TGA,and surface energy etc.The results showed that,the surface modification was chemical reaction;the modified nano-Si3N4 powder was dispersed stability in xylene,the dispersed mean diameter of nano-Si3N4 in xylene was about 30 nm and the surface energy decreased from 79.8 J·m^-2 to 39.4 J·m^-2.

关 键 词：纳米氮化硅 大分子表面偶联剂 表面改性 

分 类 号：O647.2[理学—物理化学]