摘要
研究了Span80-Tween80/异辛烷/H2O反相微乳液聚合丙烯酰胺反相微乳液聚合所得到的PAM的微观结构及其在1%高岭土悬浮液的模拟废水中的絮凝过程与机理。采用电子显微镜、激光纳米粒度仪、分光光度计等测试手段,测定了PAM粒子以及与悬浮介质结合的絮体形态、粒径和粒径分布等微观结构及其絮凝性能。试验结果表明:反相微乳液聚合所制备的PAM为单分散、球形的纳米材料,粒径(D)在145～175nm之间;AMPS改性PAM与高岭土结合后,高岭土与高分子团状结构包埋在一起,透过率较大,絮凝范围宽,可以理解为高分子絮凝剂的"架桥-吸附-网捕"机理。
Polymer polyacrylamide （PAM） was prepared by reverse microemulsion polymerization of Span80-Tween80/ isooctane/H2O, its process and mechanism of flocculation in suspension medium of 1% Kaolin were studied. Microstructures as well as the size distribution of PAM particle and flocculation properties were studied using TEM, laser nanometer measurement and spectrophotometer. Results showed that polymer of PAM prepared was mono-disperse, globular nanometer material, with diameter of PAM particle of 145nm-175nm. Kaolin was embedded in polymer when it integrated with PAM modified by AMPS, with high transmittance and wide scope of flocculation, which can be concluded by its mechanism of bridging-adsorption-net catching.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2009年第9期45-48,共4页
Environmental Science & Technology
基金
江苏省高校自然科学基础研究项目(07KJD610118)
胶体与界面化学教育部重点实验室(山东大学)开放课题基金项目(200704)
南京师范大学优秀高层次人才科研启动基金项目(2007112XGQ0131)
南京师范大学教改项目(181220002424)
关键词
反相微乳液
丙烯酰胺
聚合
絮凝
微观结构
reverse microemulsion
acrylamide
polymerization
flocculation
microstructure
