基于ZIF-8固定载体复合膜制备及CO2分离 性能研究
作者:冯孝权12,赵倩倩12,张亚涛12
单位: 1郑州大学化工学院,河南郑州450001; 2郑州市先进分离技术重点实验室,河南郑州450001
关键词: 滴涂法;ZIF-8;固定载体;复合膜;CO2分离
分类号: TQ028.8
出版年,卷(期):页码: 2021,41(4):35-41

摘要:
 制备高效分离CO2/N2的气体分离膜,一直是气体膜分离领域中的研究热点。本文采用简便的滴涂制膜方法,以聚砜(PSf)超滤膜为底膜,聚二甲基硅氧烷(PDMS)为过渡层,在制备PVAm-PEA分离功能层过程中直接引入ZIF-8纳米颗粒,制备了高选择性分离CO2/N2的新型固定载体复合膜。通过表征和性能测试,考察分析ZIF-8及其含量对复合膜形貌与气体渗透性能的影响。结果表明,ZIF-8颗粒的加入,复合膜表面形貌较空白膜粗糙,CO2渗透速率降低了43%,CO2/N2分离因子增加了220%。在0.1 MPa条件下,ZIF-8含量为0.05wt%时,CO2渗透速率为59 GPU,CO2/N2分离因子为202。
  The preparation of CO2 separation membrane with high efficiency is one of unremitting pursuits and hot topics for researchers. PSf ultrafiltration membrane was used as the bottom membrane and PDMS was coated on the PSf bottom membrane as the "gutter layer", ZIF-8, a crystalline porous material, was introduced to prepare PVAm-PEA separate functional layer for efficient separation of CO2/N2 by drop-coating method. Through a series of characterization and tests, the effects of ZIF-8 and content on the gas permeation of CO2/N2 were investigated. Results showed that the surface morphology of the composite film was coarser than that of the blank film, the CO2 permeation reduces 43% and the separation coefficient of CO2/N2 increases 220%. The content of ZIF-8 is 0.05wt%, which the maximum separation factor can up to be 202, measured at 0.1MPa, and the maximum permeation rate of CO2 can also reach 59 GPU.

基金项目:
国家自然科学基金项目(U1704139)

作者简介:
冯孝权(1989-02-28),男,河南濮阳人,博士研究生,从事膜分离技术的研究。

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