PDMS/EPDM二元聚合物网络杂化膜的制备及性能研究  

Studies on Preparation and Properties of Co(Ⅱ)-S-EPDM/PDMS Hybrid Membrane

作　　者：黄健恒[1,2] 梁潇[1,2] 任涛涛 何靖康[1,2] 郑春保 张于勇 HUANG Jian-heng;LIANG Xiao;REN Tao-tao;HE Jing-kang;ZHENG Chun-bao;ZHANG Zi-yong(Guangzhou Chemistry Co.Ltd.,CAS,Guangzhou 510650,China;Guangzhou Institute of Chemistry,CAS,Guangzhou 510650,China;Jinan University,Guangzhou 510640,China)

机构地区：[1]中科院广州化学有限公司,广东广州510650 [2]中国科学院广州化学研究所,广东广州510650 [3]暨南大学理工学院,广东广州510640

出　　处：《广州化学》2018年第4期1-9,共9页Guangzhou Chemistry

摘　　要：根据氧气的促进输送机制,使用乙丙三元橡胶磺酸钴离聚体(Co(Ⅱ)-S-EPDM)与硅橡胶PDMS进行了共混交联改性,制备出PDMS/Co(Ⅱ)-S-EPDM互穿网络杂化交联膜。Co(Ⅱ)-S-EPDM中双键、PDMS的乙烯基与含氢硅油在氯铂酸的催化下发生加成反应,形成了有机硅分子链与碳链的杂化交联互穿网络。共价键交联可使两种化学结构明显不同的分子链实现"强迫互容"。新的制备方法不仅改善了成膜性能,还使得在低压差下透氧性能P_(O_2)、和分离性能α_(O_2/N_2)同时增大。试验结果表明,在20℃和0.025 MPa压差条件下,当PDMS/Co(Ⅱ)-S-EPDM质量比为80/20时,P_(O_2)为729 Barrer,α_(O_2/N_2)则高达6.52,富氧性能超越了Robeson上限。A mechanism of facilitated oxygen transport was introduced to a novel cross-linked PDMS hybrid membrane by using a cobalt（Ⅱ）-neutralized sulfonated ethylene-propene-dinen terpolymer（Co（Ⅱ）-S-EPDM）ionomer as a modification material. A novel interpenetrating polymer network cross-linked membrane were prepared by using PDMS and Co（Ⅱ）-S-EPDM through cross-linking reactions among H-Si and the vinyl groups of PDMS and Co（Ⅱ）-S-EPDM under chloroplatinic acid catalysis. The cross-linking covalent bonds between the silicon rubber chains and carbon chains make a ＂forced compatibility＂. This novel hybrid membrane not only improves the film-forming ability, but also brings facilitated oxygen transport behavior, whose P（O2） and α（O2/N2）increase simultaneously at low pressure difference. The results showed that α（O2/N2） and P（O2） of PDMS/Co（II）-S-EPDM（80/20） membrane at 20℃ and 0.025 MPa are 6.52 and 729 Barrer, respectively.Obviously this excellent result is beyond the Robeson Upper Bound.

关 键 词：硅橡胶 三元乙丙橡胶 杂化 富氧膜 

分 类 号：TQ028.8[化学工程]