文献类型：期刊文献

英文题名：Preparation and characterization of polyvinyl alcohol/polyhedral oligosilsesquioxane hybrid membrane for pervaporation separation of high-concentration ε-caprolactam solution

作者：Li, Qin Xiang, Dingding Yin, Yi Chen, Qian Shi, Lei Lin, Wenhai

第一作者：李琴

通信作者：Lin, WH[1];Lin, WH[2]

机构：[1]Guizhou Inst Technol, Sch Chem Engn, Guiyang, Guizhou, Peoples R China;[2]Qiannan Normal Univ Nationalities Duyun, Sch Chem & Chem Engn, Duyun, Guizhou, Peoples R China;[3]Guizhou Zhenhua Qunying Elect Co Ltd, State Owned Factory Guiyang 891, Guiyang, Guizhou, Peoples R China;[4]Guizhou Univ Commerce Guiyang, Guiyang, Guizhou, 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), Guizhou Inst Technol, Sch Chem Engn, Guiyang, Guizhou, Peoples R China;corresponding author), Guizhou Zhenhua Qunying Elect Co Ltd, State Owned Factory Guiyang 891, Guiyang, Guizhou, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2023

卷号：25

期号：10

起止页码：93-101

外文期刊名：GLOBAL NEST JOURNAL

收录：;Scopus(收录号：2-s2.0-85181215375);WOS:【SCI-EXPANDED(收录号:WOS:001141630900014)】；

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).

语种：英文

外文关键词：Nano-silica particles; permeate flux; separation factor; swelling/diffusion selectivity

摘要：We used Vinyl-polyhedral oligosilsesquioxane (POSS) as a modified material and polyvinyl alcohol (PVA) to make a hybrid membrane for the pervaporation membrane separation of high-concentration caprolactam solution. The membranes were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, contact angle measurement, and swelling test. The PVA/POSS hybrid membrane exhibited unique pervaporation performance due to its hydrophobic cage -type nano-silica particles. We evaluated the permeate flux, separation factor, swelling/diffusion selectivity, and activation energy of the hybrid membrane. Evaluation results showed that POSS in the hybrid membrane hindered the crystallization of PVA. The separation flux greatly improved in the separation process of the high -concentration caprolactam solution. The excellent diffusion selectivity brought by POSS also maintained a high separation factor. When the flux reached 2.13 kg m-2 h-1, an excellent separation factor of 220 was obtained.