文献类型：期刊文献

英文题名：Separation of green solvent dimethyl carbonate/methanol azeotropic mixture by pervaporation with polydimethyl-siloxane/polyhedral oligomeric silsesquioxane composite membrane

作者：Li, Qin Lin, Wenhai Lin, Chuanwen Xiang, Dingding Chen, Dongzhi Wang, Huan Zu, Huajun

第一作者：李琴;Li, Qin

通信作者：Lin, WH[1]

机构：[1]Guizhou Inst Technol, Sch Chem Engn, Guiyang, Guizhou, Peoples R China;[2]Hefei Univ, Hefei, Anhui, Peoples R China;[3]China Energy Engn Grp Anhui Elect Power DesignIn, Hefei, Anhui, Peoples R China;[4]Qiannan Normal Univ National, Sch Chem & Chem Engn, Duyun, Guizhou, Peoples R China;[5]Wuhan Text Univ, Sch Mat Sci & Engn, Wuhan, Hubei, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Hefei Univ, Hefei, Anhui, Peoples R China.

年份：2021

卷号：23

期号：3

起止页码：458-467

外文期刊名：GLOBAL NEST JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000753901000018)】；

基金：This work was respectively supported by the National Natural Science Foundation of China (No. 21766005), the Guizhou Province Energy Chemical Conversion New Material Technology Innovation Team (No. Qian Ke He Ping Tai Ren Cai [2019] 5609), Natural Science Research Project of Young Explorer of Guizhou Education Department (No.KY2020206), University Natural Science Research Project of Anhui Province (No. KJ2019A0829) and Hefei University Science and Technology Development Foundation (No. 19ZR08ZDA).

语种：英文

外文关键词：Polyhedral oligomeric silsesquioxane; Composite membrane; azeotropic mixture separation; pervaporation; swelling selectivity

摘要：A composite active layer was prepared by cage-type polyhedral oligomeric silsesquioxane (POSS) and polydimethylsiloxane (PDMS) and was combined with polyacrylonitrile (PAN) porous support layer to form pervaporation (PV) membrane, which was used in the PV membrane separation of dimethyl carbonate (DMC)/methanol(MeOH) azeotrope. The active layer of PDMS/POSS was characterized by using X-ray diffraction, thermogravimetry, and swelling test, and the PV membrane was characterized by using scanning electron microscope and contact angle measurement. The permeability flux, separation factor and swelling/diffusion selectivity of the composite membrane were evaluated by PV test. Results show that POSS interferes with the ordered structure of PDMS, reduces the contact angle of the membrane, and is conducive to the preferential penetration of DMC. The separation flux of DMC was greatly increased in the PV process of DMC/MeOH azeotropic mixture. Moreover, the excellent swelling selectivity of PDMS/POSS active layer kept the separation factor at a high level. The novelty of this research is that POSS nanoparticles modified PV composite membranes, which can be used to separate DMC/MeOH azeotropic mixtures with good results. The maximum permeation flux of composite membrane M-3 was 4.9 kg/m2h at the operating temperature of 50 degrees C, and the separation factor was 2.31, which was higher than data reported in literature.