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首页> 外文期刊>Journal of Applied Polymer Science >Polysulfone-based composite membranes with functionalized carbon nanotubes show controlled porosity and enhanced electrical conductivity
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Polysulfone-based composite membranes with functionalized carbon nanotubes show controlled porosity and enhanced electrical conductivity

机译：具有功能化碳纳米管的基于聚砜的复合膜显示出可控制的孔隙率和增强的电导率

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摘要

Composite membranes of functionalized (-COOH, -CONH2, -N-3) carbon nanotubes/polysulfone (CNT/PS) synthesized by the phase-inversion method show unique properties with respect to surface characteristics and the selective separation of metal ions from aqueous solution. Apart from the reduction in the pore size depending on the type of functionalities on the nanotubes, the pure water permeation could reach up to as high as similar to 600 L m(-2) h(-1) (LMH) at reduced pressures and could be due to the functionalized tips of the nanotubes on the membrane surface resulting from the phase inversion process used for the membrane fabrication. The membranes were characterized by small angle neutron scattering (SANS) to confirm the uniform distribution of the nanopores and the surface morphology of the membranes. Results show that rejection of Cu(II) was better than Pb(II) depending on the surface functionality. Interestingly, these membranes also showed enhanced conductivities in the range of 1.0 x 10(-2) S cm(-1), the conductivity depending on the type of functionality on the nanotubes, thus confirming the presence of functionalized nanotubes tips on the membrane surface. (C) 2016 Wiley Periodicals, Inc.
机译：通过相转化法合成的功能化（-COOH，-CONH2，-N-3）碳纳米管/聚砜（CNT / PS）复合膜在表面特性和从水溶液中选择性分离金属离子方面表现出独特的性能。除了根据纳米管上官能团类型的不同，减小孔径之外，在减压和降压条件下，纯水的渗透率可能高达600 L m（-2）h（-1）（LMH）。这可能归因于用于膜制造的相转化工艺在膜表面上纳米管的功能化尖端。膜的特征在于小角度中子散射（SANS），以确认纳米孔的均匀分布和膜的表面形态。结果表明，取决于表面功能，Cu（II）的排斥性优于Pb（II）。有趣的是，这些膜还显示出在1.0 x 10（-2）S cm（-1）范围内增强的电导率，其电导率取决于纳米管上官能团的类型，因此证实了膜表面上存在功能化的纳米管尖端。 （C）2016威利期刊公司

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