将磺化薄膜复合纳滤膜的性能与无大孔聚醚砜/磺化聚砜/O-MWCNT 载体的结构特性相关联,Desalination

当前位置： X-MOL 学术 › Desalination › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

将磺化薄膜复合纳滤膜的性能与无大孔聚醚砜/磺化聚砜/O-MWCNT 载体的结构特性相关联
Desalination ( IF 8.3 ) Pub Date : 2020-01-01 , DOI: 10.1016/j.desal.2019.114176
Nozipho N. Gumbi , Jianxin Li , Bhekie B. Mamba , Edward N. Nxumalo

摘要在无大孔聚醚砜/磺化聚砜/氧化多壁碳纳米管 (PES/SPSf/O-MWCNT) 载体上通过界面聚合方法制备了磺化薄膜复合纳滤 (TFC NF) 膜。水相溶液由哌嗪 (PIP) 和 2,4-二氨基苯磺酸 (2,4-DABSA) 的混合物组成，有机相溶液由均苯三甲酰氯 (TMC) 组成。在 PES/SPSf/O-MWCNT 载体上制造的 TFC NF 膜与在 PES/SPSf 载体上制备的膜相比，其纯水通量提高了 35%，并且具有可比的盐截留率。PES/SPSf 载体中亲水性 O-MWCNT 的存在导致在载体表面形成一层薄的聚酰胺膜，具有增强的透水性和盐截留率。在二胺水性混合物中加入低单体重量比的 2,4-DABSA 导致磺化 TFC NF 膜的产生在纯水渗透率 (30.2 L/m2·h·bar)、单价/二价盐选择性 (αNaCl/Na2SO4 = 25.0) 在低操作压力 (3 bar) 和咸水范围内的盐浓度下。此外，制备的磺化 TFC NF 膜对牛血清白蛋白表现出良好的防污性能，经过三个污垢和清洁循环后可获得 96.4% 的通量回收率。在 10 天的纯水通量和 Na2SO4 脱盐测试期间，磺化 TFC NF 膜的性能保持相当稳定。

"点击查看英文标题和摘要"

Relating the performance of sulfonated thin-film composite nanofiltration membranes to structural properties of macrovoid-free polyethersulfone/sulfonated polysulfone/O-MWCNT supports

Abstract Sulfonated thin-film composite nanofiltration (TFC NF) membranes were produced on macrovoid-free polyethersulfone/sulfonated polysulfone/oxidised multi-walled carbon nanotube (PES/SPSf/O-MWCNT) supports via an interfacial polymerisation method. The aqueous phase solution consisted of a mixture of piperazine (PIP) and 2,4-diaminobenzene sulfonic acid (2,4-DABSA) and the organic phase solution consisted of trimesoyl chloride (TMC). The TFC NF membranes fabricated on the PES/SPSf/O-MWCNT supports showed a 35% improvement in pure water flux with comparable salt rejections from those prepared on PES/SPSf supports. The presence of hydrophilic O-MWCNTs in the PES/SPSf supports resulted in the formation of a thin polyamide film on the surface of the support with enhanced water permeability and salt rejection. The addition of low monomer weight ratio of 2,4-DABSA in the diamine aqueous mixture led to the generation of sulfonated TFC NF membranes with superior membrane performance in terms of pure water permeability (30.2 L/m2·h·bar), monovalent/bivalent salt selectivity (αNaCl/Na2SO4 = 25.0) at low operating pressures (3 bar) and at salt concentrations in the range of brackish waters. Moreover, the fabricated sulfonated TFC NF membranes exhibited good antifouling properties against bovine serum albumin, with a flux recovery ratio of 96.4% obtainable after three cycles of fouling and cleaning. The performance of the sulfonated TFC NF membranes remained fairly stable over a 10-day period of pure water flux and Na2SO4 salt rejection testing. The fabricated sulfonated TFC NF membranes displayed promising features for use as pre-treatment membranes for lower-pressure water softening and desalination of brackish water.

更新日期：2020-01-01

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南