膜科学与技术

ZIF-8对Ultem?1000中空纤维气体分离膜性能影响研究

作者：段翠佳，曹义鸣，陈赞

单位： 1.中海油天津化工研究设计院有限公司，天津 300130；2.中国科学院大连化学物理研究所，大连116023

关键词： ZIF-8，聚醚酰亚胺，中空纤维混合基质膜，气体分离

出版年,卷(期):页码： 2020,40(3):88-94

摘要：

以高比表面积、纳米尺寸ZIF-8作分散相、以Ultem?1000作连续相，通过干-湿相转化纺丝法分别制备了Ultem?1000和ZIF-8/Ultem?1000中空纤维气体分离膜，研究了ZIF-8对膜性能的影响。SEM和机械强度测试结果表明，ZIF-8的引入减小了中空纤维膜支撑层的指状孔结构且使内皮层变疏松多孔；膜抗拉强度几乎不变甚至略有增加。ZIF-8/Ultem?1000中空纤维膜的气体渗透通量和分离系数较Ultem?1000中空纤维膜均有明显提升：O2渗透通量由2.56GPU增加至3.56GPU，O2/N2分离系数由5.81增至7.74。

With high specific surface area and nanoscale ZIF-8 as dispersed phase and Ultem?1000 as continuous phase, Ultem?1000 hollow fiber membraneand ZIF-8/Ultem?1000 hollow fiber membrane were fabricated respectivelyby dry-wet spinning method to investigate the influence of ZIF-8 on properties of hollow fiber membranes. Results of SEM showed that the support layer of ZIF-8/Ultem?1000hollow fiber membrane was dominated by sponge pore structure and the inner surface of ZIF-8/Ultem?1000 hollow fiber membrane became porous. Meanwhile, it was demonstrated that the tensile strength of hollow fiber membrane with the addition of ZIF-8 was almost unchanged or even slightly increasedcomparedwithUltem?1000 hollow fiber membrane. Gas permeation test resultsindicated that both gas permeance and selectivity of ZIF-8/Ultem?1000 hollow fiber membranewere obviously improved compared with those of pure Ultem?1000 hollow fiber membrane: O2 permeance increased from 2.56 GPU to 3.56 GPU and O2/N2 selectivity increased from 5.81 to 7.74.

第一作者简介：段翠佳（1987-），女，河北石家庄，博士，工程师，膜分离技术，E-mail：duancj@cnooc.com.cn

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