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Selectivity-permeability optimization of functionalised CNT-polymer membranes for water treatment: A modeling study

机译:用于水处理的功能化CNT聚合物膜的选择性-渗透性优化:模型研究

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Polymer membranes incorporating carbon nanotubes (CNT) belong to two broad categories: Vertically aligned (VA-CNT) membranes, where the polymer acts solely as a matrix embedding an aligned forest of nanotubes, and thin film composite (CNT-TFC) membranes which incorporate randomly aligned nanotubes in their selective layer. The former can achieve orders-of-magnitude higher permeability than many commercial membranes but cannot be scaled up industrially. The latter are based on commercial technology but provide only modest flux increases. Furthermore, filtration in VA-CNT is based on steric hindrance determined by the tubes' diameter, whereas in CNT-TFCs, the tubes are embedded in the polymer with selectivity given by the polymer alone.
机译:包含碳纳米管(CNT)的聚合物膜分为两大类:垂直排列(VA-CNT)膜,其中聚合物仅充当嵌入排列成排的纳米管森林的基质,以及薄膜复合物(CNT-TFC)膜,其中包含在其选择层中随机排列的纳米管。前者可以实现比许多商业膜更高的数量级渗透率,但无法在工业上扩大规模。后者基于商业技术,但仅提供适度的通量增加。此外,在VA-CNT中过滤是基于由管子直径决定的空间位阻,而在CNT-TFC中,管子是嵌入到聚合物中的,而选择性仅由聚合物决定。

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