超声波场下相分离法制备Ag/PA-6复合粒子  

Preparation of Ag/PA-6 composite particles by phase separation method under ultrasonic irradiation

作　　者：张凯[1] 范敬辉[1] 马艳[1] 吴菊英[1] 

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《化工进展》2011年第4期820-823,共4页Chemical Industry and Engineering Progress

摘　　要：在尼龙-6(PA-6)的甲酸溶液中加入表面处理的Ag粒子,然后采用滴加非溶剂法和冷却降温法相结合的相分离法促使PA-6粒子的成型,同时在相分离及分散过程中引入超声波场,制备出Ag/PA-6复合粒子。通过对Ag/PA-6复合粒子的结构表征,发现Ag/PA-6复合粒子形状不规整,表面存在一定的缺陷,但结构非常致密,复合粒子周围及表面无游离的纳米Ag粒子存在,包覆率较高。在相同无机粒子添加量(质量分数20%)的条件下,采用相分离法制备的复合粒子的无机粒子包覆率(81%)高于原位分散聚合法(47%)。Ag/PA-6 composite particles were prepared with the combined dropping nonsolvent method and cooling temperature method in the presence of Ag particles in PA-6 formic acid solution under ultrasonic irradiation.The characterization results showed that Ag/PA-6 composite particles had abnormity and compact surface structure.The almost whole of Ag particles were encapsulated by PA-6,and no dissociative Ag particles surrounded PA-6 particles.With the same amount of 20% inorganic particles,composite particles prepared with phase separation had larger encapsulation ratio than those prepared with dispersion polymerization.The former encapsulation ratio was 81%,and the latter encapsulation ratio was 47%.

关 键 词：超声波场 相分离 复合粒子 

分 类 号：TQ316.6[化学工程—高聚物工业]