Abstract:

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%.

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%）。