硅橡胶复合膜的制备及气体分离性能研究  

Preparation of silicone rubber composite membrane and study on its gas separation performance

作　　者：张艳文 郭猛[1] 任秀秀 徐荣[1] 孙云娟[2] 马忠林[3] 钟璟[1] ZHANG Yan-wen;GUO Meng;REN Xiu-xiu;XU Rong;SUN Yun-juan;MA Zhong-lin;ZHONG Jing(Jiangsu Provincial Key Laboratory of Fine Petrochemical Engineering,Changzhou University,School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China;Institute of Chemical Industry of Forest Products,Chinese Academy of Forestry,Nanjing 210042,China;Nanjing Research Institute,Sinopec Yangzi Petrochemical Co.,Ltd.,Nanjing 210048,China)

机构地区：[1]常州大学石油化工学院,常州大学精细石油化工江苏省重点实验室,江苏常州213164 [2]中国林业科学研究院林产化学工业研究所,江苏南京210042 [3]中国石化扬子石油化工有限公司南京研究院,江苏南京210048

出　　处：《现代化工》2023年第8期139-144,共6页Modern Chemical Industry

基　　金：江苏省自然科学基金青年基金项目(BK20210855,BK20200982);江苏省高校自然科学研究重大项目(22KJA530001);常州市科技计划项目(CJ20220140,CE20225057,CZ20220033);中国石油化工股份有限公司科技部委托项目(223155)。

摘　　要：采用聚二甲基硅氧烷(PDMS)和聚二甲基硅氧烷-co-二苯基硅氧烷(PDMS-B)2种不同硅橡胶制备成膜,并将其应用于气体分离,探究了2种不同侧基的硅橡胶复合膜对CO_(2)分离性能的影响。结果表明,与具有甲基侧链的PDMS相比,具有苯基侧链的PDMS-B主链间距扩大,降低了空间位阻,同时,庞大的苯基侧基抑制了聚合物主链的协同运动,使得制备的复合膜网络结构较为疏松。制备的PDMS-B复合膜与PDMS复合膜相比CO_(2)渗透通量提高了1倍,CO_(2)/N_(2)选择性提高了69%,为CO_(2)分离提供了有利选择。Polydimethylsiloxane(PDMS)and polydimethylsiloxane-co-diphenyl siloxane(PDMS-B)are respectively used to prepare the membranes that are applied to gas separation.The influence of side groups in silicone rubber on the separation performance of CO_(2) is investigated.Compared to PDMS with methyl side chain,PDMS-B with phenyl side chain extends the main chain distance and reduces the steric hindrance itself.Meanwhile,the large phenyl side group inhibits the coordinated movement of the main polymeric chain,which makes the structure of the prepared composite membrane network looser.In comparison with PDMS composite membranes,the CO_(2) permeance and CO_(2)/N_(2) selectivity of PDMS-B composite membranes are doubled and increased by 69%respectively,providing another favorable choice for CO_(2) separation.

关 键 词：CO_(2)分离 膜分离 苯基 甲基 硅橡胶 

分 类 号：O633.4[理学—高分子化学]