A novel sulfaguanidine (SG)-modified polyamide thin-film composite (TFC) nanofiltration (NF) membrane was constructed by the strategy referred to as co-solvent assisted interfacial polymerization (CASIP), which involves the respective interfacial polymerization (IP) of piperazine (PIP) and SG with trimesoyl chloride (TMC) on porous polysulfone (PSf) supports. CASIP enables the formation of a defect-free thin dense active layer and favors higher water permeance up to 79.0 L m ~(?2) h ~(?1) with rejection above 98.3% for Na _(2) SO _(4) . The resulting PA membrane also demonstrates a high flux recovery ratio of nearly 98.9% to bovine serum albumin protein after being cleaned. More importantly, the current membrane shows excellent anti-adhesive and antimicrobial performances against Gram-negative Escherichia coli , Gram-positive Bacillus pumilus LDS.33 and Aspergillus parasiticus JFS. This promises great potential application of the PA membrane for practical water/wastewater treatment. The prospect of using the co-solvent mediated SG-modified layer as a next-generation anti-fouling/antimicrobial membrane is very encouraging.
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机译：通过称为共溶剂辅助界面聚合（CASIP）的策略，构建了一种新的磺胺胍（SG）改性的聚酰胺薄膜复合材料（TFC）纳滤（NF）膜，该策略涉及哌嗪各自的界面聚合（IP） （PIP）和SG与均苯三甲酰氯（TMC）在多孔聚砜（PSf）载体上。 CASIP能够形成无缺陷的薄致密活性层，并有利于高达79.0 L m〜（？2）h〜（？1）的更高水渗透性，Na _（2）SO _（4）的截留率高于98.3％。 。清洗后，所得的PA膜对牛血清白蛋白的通量回收率也很高，接近98.9％。更重要的是，当前的膜对革兰氏阴性大肠杆菌，革兰氏阳性短小芽孢杆菌LDS.33和寄生曲霉JFS具有优异的抗粘连和抗菌性能。这保证了PA膜在实际水/废水处理中的巨大潜在应用。使用助溶剂介导的SG改性层作为下一代防污/抗菌膜的前景令人鼓舞。
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