Mixed matrix membranes with molecular-interaction-driven tunable free volumes for efficient bio-fuel recovery
Mixed matrix membranes with molecular-interaction-driven tunable free volumes for efficient bio-fuel recovery
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具有分子相互作用驱动的可调自由体积的混合基质膜，可实现高效的生物燃料回收
DOI：
10.1039/c4ta05881j
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发表时间：
2015-02
影响因子：
11.9
通讯作者：
Jin WQ
中科院分区：
文献类型：
--
作者：
Liu Gongping;Hung Wei-Song;Shen Jie;Li Qianqian;Huang Yun-Hsuan;Jin Wanqin;Lee Kueir-Rarn;Lai Juin-Yih;Jin WQ
混合基质膜（MMMs）由分散在聚合物基质中的无机填料组成，被视为最有前途的未来膜材料之一。这项工作报道了利用分子间相互作用来精细控制（此处句子不完整，最后一个单词“an”可能有误）……的构象。
Mixed matrix membranes (MMMs), consisting of inorganic fillers dispersed in a polymer matrix, are regarded as one of the most promising futuristic membranes. This work reports the utilization of molecular interactions to finely control the conformation and topology of polymer chains to fabricate high-performance polyhedral oligomeric silsesquioxanes (POSS)/polydimethylsiloxane (PDMS) MMMs. The influence of the incorporation of POSS on the polymer structure was systematically studied by molecular dynamics simulations combined with DSC, XRD and IR measurements. The surface and interfacial morphologies of the MMMs were observed through SEM, TEM and AFM characterizations. In particular, positron annihilation spectroscopy was employed to analyze the evolution of free volumes in the MMMs. Results indicated that facilely incorporating POSS into PDMS by molecular interactions could manipulate favorable interfacial morphology and tunable free volumes in MMMs. In the PDMS MMMs, the small free volumes were reduced and the large free volumes increased; these changes were beneficial for the preferential permeation of large-sized molecules through the polymeric membrane. As applied to the bio-butanol recovery from aqueous solutions, the prepared POSS/PDMS MMMs exhibited a simultaneous increase in permeability and selectivity, breaking the permeability-selectivity trade-off limitation, moreover transcending the upper bound of the state-of-the-art organophilic pervaporation membranes. Therefore, our work demonstrates that the proposed approach based on rationally creating molecular interactions can be expected to have broad applicability in fabricating high-quality MMMs for molecular separations.
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影响因子：
56.9
作者：
Merkel, TC;Freeman, BD;Hill, AJ
通讯作者：
Hill, AJ
DOI：
10.1016/j.memsci.2011.05.060
发表时间：
2011-09
期刊：
Fuel and Energy Abstracts
影响因子：
--
作者：
N. Le;Yan Wang;T. Chung
通讯作者：
N. Le;Yan Wang;T. Chung
影响因子：
6.3
作者：
P. Kirkegaard;M. Eldrup;O. Mogensen;N. Pedersen
通讯作者：
P. Kirkegaard;M. Eldrup;O. Mogensen;N. Pedersen
DOI：
10.1016/j.memsci.2011.02.042
发表时间：
2011-05
期刊：
Fuel and Energy Abstracts
影响因子：
--
作者：
Gongpin Liu;Wang Wei;Hao Wu;Xueliang Dong;M. Jiang;W. Jin
通讯作者：
Gongpin Liu;Wang Wei;Hao Wu;Xueliang Dong;M. Jiang;W. Jin
影响因子：
8.4
作者：
Liu, Gongping;Wei, Wang;Jin, Wanqin
通讯作者：
Jin, Wanqin