Water-absorbent Polymer Particle Prepared BY Dispersing Polymerization Method Cao Aili, Wang Qiang, Wang Ping, Cao Peng, Yu Jie, Guo Shuhua # (Biological and Chemical Engineering College, Tianjin Institute of Technology, Tianjin 300191 #Central Research Lab, NanKai University, Tianjin 300071) Abstarct In this paper, the water-absorbent high polymer particle of PAA Na was synthesized by disperisng polymerization method. Ethanol /water was used as dispersion medium, acrylic acid as monomer and gelatin as dispersion agent. After the neutralization, initiation and crosslinking reaction, the sodium salt of polyacrylic acid was obtained. The particles ball of the product was observed through scanning electronic microscope having the diameter of 100~ 200m m.The product can absorb deionized water 303g/g, water with pH4 210g/g and water with pH10 245g/g, respectively. The absorbed water ratio effect through dispersion medium, the dosage of crosslinking agent and dispersion agent were also discussed. Key words Dispersion polymerization, crylic acid, Ethanol, Gelatin, Water-absorbent high polymer particle. 分散聚合法制备吸水高分子微球 曹爱丽 王强 王苹 曹鹏 于洁 (天津理工学院 生物与化学工程学院 天津 300191) 郭淑华 (南开大学 中心实验室 天津 300071) 摘要 本文采用分散聚合法，以乙醇/水混合溶液为分散介质，丙烯酸(AA)为单体，明胶为分散剂，经中和、引发和交联反应，合成了聚丙烯酸盐(PAANa)吸水高分子微球。经扫描电镜观测，其粒径在 100～200mm，可吸去离子水 303g/g,吸 PH=4 的酸性水为 210g/g，吸 PH=10 的碱性水为 245g/g。并讨论了分散介质、交联剂与分散剂用量及丙烯酸中和度等因素对吸水率的影响。 关键词 分散聚合 丙烯酸 乙醇 明胶 吸水高分子微球 曹爱丽 女，60岁，教授，从事功能高分子膨胀材料的研究及高分子专业教学。 天津市科委重点攻关项目(003104811) 2001-10-15收稿，2002-01-20修回 (PDF全文下载c02031)