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Relationship between permeate flux and surface roughness of membranes with similar water contact angle values

机译：与水接触角相似的膜的通量与膜表面粗糙度的关系

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摘要

In this study, it was evident that poly(vinylidene fluoride) (PVDF) membrane with a smooth surface (B2) displayed normalized flux as well as permeate flux superior to PVDF membrane with a rough surface (B1) during microfiltration. Before carrying out permeate flux and normalized flux tests, two PVDF membranes were prepared in order to obtain similar characteristics such as material, average pore size, and water contact angle value for the purpose of accurate comparisons under similar membrane preparation conditions. In flux performance tests where humic acid (HA) was used as feed solution, the permeate flux of the B2 membrane with the smooth surface was 12.02% higher (15.65 L/m(2) h difference at 0.2 bar) than that of the B1 membrane with the rough surface after 120 min. Moreover, the B2 membrane also displayed higher normalized flux compared with the B1 membrane, which was caused by difference in surface structure. (C) 2015 Elsevier B.V. All rights reserved.
机译：在这项研究中，很明显在微滤过程中，具有光滑表面（B2）的聚偏二氟乙烯（PVDF）膜显示出归一化的通量以及优于具有粗糙表面的PVDF膜（B1）的通量。在进行渗透通量和归一化通量测试之前，为了在相似的膜制备条件下进行准确比较，准备了两种PVDF膜以获得相似的特性，例如材料，平均孔径和水接触角值。在使用腐植酸（HA）作为进料溶液的通量性能测试中，具有光滑表面的B2膜的渗透通量比B1膜的渗透通量高12.02％（在0.2 bar下相差15.65 L / m（2）h）。 120分钟后膜表面粗糙。此外，由于表面结构的差异，B2膜也比B1膜具有更高的归一化通量。 （C）2015 Elsevier B.V.保留所有权利。

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