Influence of the molecular structure of polybinaphthalene on the membrane separation performance
Influence of the molecular structure of polybinaphthalene on the membrane separation performance
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聚联萘分子结构对膜分离性能的影响
DOI：
10.1016/j.eurpolymj.2018.02.034
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发表时间：
2018
影响因子：
6
通讯作者：
G. Koeckelberghs
中科院分区：
文献类型：
--
作者：
Mikael Monga Mulunda;Cedric Van Goethem;Zidan Zhang;E. Nies;I. Vankelecom;G. Koeckelberghs
以亚甲基(CH2)、乙烯(C2H4)、丙烯(C3H6)和丁烯(C4H8)为连接物，在2，2‘-位上桥联了手性联苯，以改变联苯的二面角，从而研究后者对聚联苯气体分离膜性能的影响。假设不同的角度会导致不同的膜性能。具有四种不同连接基的聚合物膜具有平均的气体选择性，CO_2/CH_4= 22 ± 3和CO_2/N_2= 28 ± 2，这强烈地表明这些聚合物具有非常相似的大分子结构。CD光谱证实了这一点，它揭示了相同的棉花效应模式。大分子结构的相似性可以归因于连接物引入的二面角变化小于预期，如密度泛函计算所示，乙烯、丙烯和丁烯之间的差异为4°。
A chiral binaphthalene is bridged at the 2,2′-positions with methylene (CH2), ethylene (C2H4), propylene (C3H6) and butylene (C4H8) linkers, with the aim to vary the binaphthalene dihedral angle and hence to study the influence of the latter on the polybinaphthalene gas separation membrane performances. It was hypothesized that different angles would induce different membrane performances. The polymer membranes with the four different linkers show average gas selectivities, CO2/CH4= 22 ± 3 and CO2/N2= 28 ± 2, which strongly indicates that these polymers have strongly similar macromolecular structures. This is confirmed by CD spectroscopy which reveals the same Cotton effect patterns. The similarity in the macromolecular structures can be ascribed to a smaller than anticipated change in the dihedral angle introduced by the linkers, 4° of difference between ethylene, propylene and butylene, as demonstrated by DFT calculations.
影响因子：
3.6
作者：
Schilz, Marc;Plenio, Herbert
通讯作者：
Plenio, Herbert