Preparation of core–shell composite polymer particles by a novel heterocoagulation based on hydrophobic interaction
Preparation of core–shell composite polymer particles by a novel heterocoagulation based on hydrophobic interaction
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DOI：
10.1007/s00396-003-0948-4
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发表时间：
2004-02
影响因子：
2.4
通讯作者：
K. Yamaguchi;M. Ito;T. Taniguchi;S. Kawaguchi;K. Nagai
中科院分区：
文献类型：
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作者：
K. Yamaguchi;M. Ito;T. Taniguchi;S. Kawaguchi;K. Nagai
具有活性酯基的亚微米大小的阳离子聚苯乙烯壳粒子有效地自组装在交联聚苯乙烯（PST）粒子的疏水表面上，PST是水体系中直径约8.5-µm的不带电核心粒子。壳粒和核粒之间的疏水相互作用在异聚反应中起关键作用。制备的异混凝物在水中具有较高的物理稳定性，其形态受胶乳固体含量、自组装时间和电解质浓度等因素的控制。在高于阳离子聚合物壳颗粒玻璃化转变温度（Tg）的温度下，对异混凝物进行热处理3 h，成功地获得了具有核壳结构的复合聚合物颗粒。
Submicron-sized cationic polystyrene shell particles with active ester groups were effectively self-assembled on hydrophobic surfaces of cross-linked polystyrene (PST) particles, uncharged core particles with ca. 8.5-µm diameter in aqueous systems. The hydrophobic interactions between the shell particles and core particles play a key role in heterocoagulation. The resulting heterocoagulates were highly physically stable in water, and the morphology was controlled by several factors including the solid content of latex, self-assembling time, and electrolyte concentration. Composite polymer particles with a core–shell structure were successfully obtained from the heterocoagulates by heat treatment for 3 h at a temperature above the glass transition temperature (Tg) of the cationic polymer shell particles.