纳米两性聚乙烯铵-丙烯酸钠膜的制备与表征  

Preparation and Characterization of Nano-scaled Polyethylene Ammonium-Sodium Acrylate Polyampholite Membrane

作　　者：刘圣环[1] 于立娟[1] 王晓慧[1] 张艳梅[1] 于浩强[1] 孟平蕊[1] 

机构地区：[1]济南大学化学化工学院,山东济南250022

出　　处：《中国粉体技术》2011年第2期49-52,共4页China Powder Science and Technology

基　　金：国家重点基础研究发展计划(973计划)项目;编号:2003CB615701

摘　　要：为研究一种新型两性聚电解质渗透汽化膜分离材料,利用沸腾、高速搅拌的无皂乳液聚合法合成纳米聚丙烯酰胺-丙烯酸,经Hoffman降解制备纳米聚乙烯铵-丙烯酸钠。利用红外光谱、扫描电镜和激光粒度分析仪对纳米聚乙烯铵-丙烯酸钠进行结构表征,测试不同pH值时聚乙烯铵-丙烯酸钠膜的耐水性。对不同浓度、不同有机物-水体系中的溶胀度和吸水速率进行测试。结果表明:聚乙烯铵-丙烯酸钠粒径在24 nm左右、pH≈5(接近等电点)时,聚乙烯铵-丙烯酸钠膜的耐水性最好,适合乙醇、丙酮中水的分离。In order to develop a new type of polyamphoteric electrolyte pervaporation membrane materials, nano-sized polyacrylamide-acrylic acid （PAM-AA） particles were prepared using the soap-free emulsion polymerization method and boiling at high temperature and became nano-sized polyethylene ammonium-sodium acrylate（PVAM-SA） particles by Hoffman degradation reaction. The structure of PAM-SA was characterized using Fourier transform infrared spectroscopy （FTIR） and scanning electron microscopy （SEM） and laser particle size analysis. The water-resistant properties of the PVAM-SA polyampholite membrane under defferent pH values were studied. The degree of swelling and water-absorbent rate of the PVAM-SA polyampholite membrane were tested in de fferent organic-water system, with a series of concentrations.The results showed that the size of PVAM-SA particles were about 24 nm. The water-resistant properties of the PVAM-SA polyampholite membrane were better for ethanol-water system and acetone-water system at pH^- 5 （near the isoelectric point）.

关 键 词：乳液聚合 纳米聚乙烯铵-丙烯酸钠 两性聚电解质 渗透汽化膜 

分 类 号：O631.5[理学—高分子化学]