Preparation of core鈥搒hell composite polymer particles by a novel heterocoagulation based on hydrophobic interaction
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- 作者：K. Yamaguchi ; M. Ito ; T. Taniguchi ; S. Kawaguchi and K. Nagai
- 关键词：Cationic polymer particle ; Self ; assembling ; Heterocoagulation ; Hydrophobic interaction ; Core– ; shell structure
- 刊名：Colloid & Polymer Science
- 出版时间：February 2004
- 出版年：2004
- 期刊代码：60_0303-402X
- 类别：bio
- 卷：282
- 期：4
- 页码：366-372
- 数据来源：sp
摘要
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.