摘要
为得到高通量的水中脱除丁醇渗透汽化膜HPSiO-c-PDMS,采用AB_2型单体缩合法合成了超支化聚硅氧烷(HPSiO)并将其与端羟基聚二甲基硅氧烷(PDMS)交联制备渗透汽化复合膜.对超支化聚硅氧烷和HPSiO-c-PDMS膜进行了化学结构和形态表征,并系统研究了PDMS分子量大小对膜结构及其渗透汽化性能的影响.结果表明:超支化聚合物支化度(DB)达到0.73;HPSiO-c-PDMS膜具有较大的通量和分离因子,随着PDMS分子量的增加,其渗透通量减小而分离因子增加.
Hyperbranched polysiloxane was prepared with a one-pot polymerization process of AB_2 type monomer,which was used to fabricate a pervaporation membrane,HPSiOc-PDMS membrane,to recover n-butanol from aqueous solution.The chemical structure and morphology of the hyperbranched polysiloxane and HPSiO-c-PDMS membrane were characterized.In addition,the effect of molecular weight of PDMS on the chain structures and pervaporation performance of HPSiOc-PDMS membranes were also systematically studied.The results indicated the degree of branching(DB) of hyperbranched polysiloxane was 0.73 and HPSiO-c-PDMS membrane has large flux and separation factor.With increasing of the molecular weight of PDMS,the separation factor increased and total flux decreased.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2013年第3期64-69,共6页
Membrane Science and Technology
基金
国家自然科学青年基金资助项目(21106053)
中央高校基本科研业务费专项资金资助(JUSRP311A01)
关键词
渗透汽化
超支化聚硅氧烷
正丁醇
pervaporation
hyperbranched polysiloxane
n-butanol
