处理后的ZIF-8对混合基质膜PDMS顶层气体分离性能的改善

Q2 Materials Science

Journal of Membrane Science and Research Pub Date : 2020-06-17 DOI:10.22079/JMSR.2020.122067.1348

Y. Mansourpanah, Fatemeh Bagri

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引用次数: 2

摘要

选择性和渗透性是气体分离过程中的两个重要参数。因此，目前，对膜进行改性以提高上述参数，引起了人们的高度重视。在本研究中，为了提高聚合物膜的性能，将裸露的ZIF-8纳米颗粒（NP）以及退火的和NH2-功能化的纳米颗粒（小于100nm的中等尺寸颗粒）以不同浓度引入聚二甲基硅氧烷（PDMS）顶层的结构中。ZIF-8的高孔隙率和气体吸附特性使其成为改性和提高聚合物膜效率的合适纳米填料。膜的CO2/N2和O2/N2选择性相对于负载ZIF-8而提高。此外，采用NH2-功能化和热退火的ZIF-8s来比较处理的NP对所制造的MMM的效率的结果。因此，上述两种配对气体的选择性都得到了提高。在2wt%的退火ZIF-8s下，混合基质膜（MMM）对O2/N2和CO2/N2分别表现出超过5.5和22.37的期望分离选择性。

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Improvement of the Performance of PDMS Top Layer of Mixed Matrix Membrane Incorporated with Treated ZIF-8 for Gas Separation

Selectivity and permeability are two significant parameters in the gas separation process. Hence, nowadays, modification of membrane to improve the parameters mentioned above, have highly gained attention. In this study, to increase the performance of the polymeric membrane, bare ZIF-8 nanoparticle (NP), as well as annealed and NH2 -functionalized ones (Medium-sized particles less than 100 nm), were introduced into the structure of polydimethylsiloxane (PDMS) top layer at different concentrations. The high porosity and gas adsorption characteristics of the ZIF-8 made it a proper nanofiller to modify and improve the efficiency of polymeric membranes. The CO2 /N2 and O2 /N2 selectivity of the membranes improved regarding the loading ZIF-8. In addition, NH2 -functionalized and thermal annealed ZIF-8s employed to compare the result of the treated NPs on the efficiency of the fabricated MMMs. Consequently, the selectivity of both mentioned pair gases improved. At 2 wt% of annealed ZIF-8s, the mixed matrix membrane (MMM) presents a desired separation selectivity over 5.5 and 22.37 for O2 /N2 and CO2 /N2 , respectively.

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来源期刊

Journal of Membrane Science and Research Materials Science-Materials Science (miscellaneous)

CiteScore

4.00

自引率

0.00%

发文量

审稿时长

8 weeks

期刊介绍： The Journal of Membrane Science and Research (JMSR) is an Open Access journal with Free of Charge publication policy, which provides a focal point for academic and industrial chemical and polymer engineers, chemists, materials scientists, and membranologists working on both membranes and membrane processes, particularly for four major sectors, including Energy, Water, Environment and Food. The journal publishes original research and reviews on membranes (organic, inorganic, liquid and etc.) and membrane processes (MF, UF, NF, RO, ED, Dialysis, MD, PV, CDI, FO, GP, VP and etc.), membrane formation/structure/performance, fouling, module/process design, and processes/applications in various areas. Primary emphasis is on structure, function, and performance of essentially non-biological membranes.