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首页> 外文期刊>Journal of Applied Polymer Science >Enhancing water flux through semipermeable polybenzimidazole membranes by adding surfactant-treated CNTs
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Enhancing water flux through semipermeable polybenzimidazole membranes by adding surfactant-treated CNTs

机译：通过加入表面活性剂处理的CNT通过半透明聚苯和咪唑膜增强水通量

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In this study, surfactant-treated carbon nanotubes (CNTs) were incorporated into polybenzimidazole (PBI) matrix to prepare the PBI/CNT composite membranes with CNT content in the range of 0 to 15 wt %. The composite membranes were fabricated by spin-coating. The membrane morphology, mechanical property, and water and salt transport properties were investigated to characterize the additive effect of CNTs. The tensile strength of all the PBI/CNT composite membranes was lower than that of pristine PBI membrane, indicating the weak interaction between CNT and PBI. In addition, water flux increased without reducing the salt rejection when CNTs were homogeneously dispersed in the PBI matrix at a less than 7.5 wt % content. On the other hand, at 10 wt % and higher CNT content, submicro-scaled cellular structure was formed, and both the water flux and salt rejection decreased. The well-dispersed CNTs in the PBI matrix via weak interaction preferentially improve the water permeability by 1.7 times without depressing the salt rejection. The incorporation of well-dispersed CNTs in polymer matrix provides a promising and facile option for improvement in the water transport properties through the polymeric semipermeable membranes with intrinsically low water permeability such as PBI. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45875.
机译：在该研究中，将表面活性剂处理的碳纳米管（CNT）掺入聚苯旁咪唑（PBI）基质中，以制备具有CNT含量的PBI / CNT复合膜在0至15wt％的范围内。通过旋涂制造复合膜。研究了膜形态，力学性能和水和盐迁移性能，表征CNT的添加剂效应。所有PBI / CNT复合膜的拉伸强度低于原始PBI膜的拉伸强度，表明CNT和PBI之间的弱相互作用。此外，当CNT以小于7.5wt％含量均匀地分散在PBI基质中时，水通量增加而不减少盐排斥。另一方面，在10wt％和更高的CNT含量下，形成亚微米缩放的细胞结构，并且水通量和盐排斥减少。通过弱相互作用在PBI基质中分散的分散的CNT优先提高水渗透率1.7次，而不会抑制盐排斥。在聚合物基质中掺入井分散的CNT提供了有希望的和容易的选择，可通过聚合物半透膜改善水传输性质，其具有本质上的低水渗透性，例如PBI。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,45875。

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