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首页> 外文期刊>ACS applied materials & interfaces >Antibacterial Electrospun Poly(vinyl alcohol)/Enzymatic Synthesized Poly(catechol) Nanofibrous Midlayer Membrane for Ultrafiltration
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Antibacterial Electrospun Poly(vinyl alcohol)/Enzymatic Synthesized Poly(catechol) Nanofibrous Midlayer Membrane for Ultrafiltration

机译：抗菌电纺聚（乙烯醇）/酶合成聚（儿茶酚）纳米纤维中型膜超滤

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摘要

Two different nanofibrous antibacterial membranes containing enzymatically synthesized poly(catechol) (PC) Or silver nitrate (AgNO3, positive control) blended with poly(vinyl alcohol) (PVA) and electrospun onto a poly(vinylidene fluoride) (PVDF) basal disc to generate thin-film composite midlayers were produced for water ultrafiltration applications. The developed membranes were thoroughly characterized in terms of morphology, chemical composition, and general mechanical and thermal features, antimicrobial activity, and ultrafiltration capabilities. The electrospun blends were recognized as homogeneous. Data revealed relevant conformational changes in the PVA side groups, attributed to hydrogen bonding, high thermal stability, and residual mass. PVDF+PVA/AgNO3 membrane displayed 100% growth inhibition of both Gram-positive and Gram-negative bacteria strains, despite the wide range of fiber diameters generated, from 24 to 125 rim, formation of numerous beads, and irregular morphology. The PVDF+PVA/PC Membrane showed a good growth inhibition of Staphylococcus aureus (92%) and revealed a smooth morphology with no relevant bead formations and diameters ranging from 68 to 131 nm. The ultrafiltration abilities of the membrane containing PVA/PC were tested in a dead-end high-pressure cell (4 bar) using a reactive dye in distilled water and seawater. After 5 cycles, a maximum rejection of with an average flux rate of 70 L m(-2) h(-1) for distilled water and with an average flux rate of 62 L m(-2) h(-1) for seawater were determined with an overall salt rejection of approximate to 5%.
机译：含有酶合成的聚（儿茶酚）（PC）或硝酸银（AgNO 3，阳性对照）与聚（乙烯醇）（PVA）和ElectromatON的硝酸银（AgNO 3，阳性对照）含有酶（乙烯基醇）（PVDF）基础圆盘，以产生为水超滤应用生产薄膜复合中间层。在形态学，化学成分和一般机械和热特征，抗微生物活性和超滤能力方面，彻底地表征了发育膜。将电纺共混物被认为是均匀的。数据显示了PVA侧组的相关构象变化，归因于氢键，高热稳定性和残留物质。 PVDF + PVA / AgNO3膜显示革兰氏阳性和革兰氏阴性细菌菌株的100％生长抑制，尽管产生的纤维直径范围广，从24-125圈，形成众多珠子和不规则形态。 PVDF + PVA / PC膜呈现出良好的生长抑制金黄色葡萄球菌（92％），并揭示了没有相关珠粒形成的平滑形态，直径为68至131nm。含有PVA / PC的膜的超滤能力在蒸馏水和海水中使用反应性染料在死端高压池（4巴）中进行测试。在5个循环后，最大限度地排斥蒸馏水的平均通量为70Lm（-2）H（-1）的平均通量速率，并且海水的平均通量率为62Lm（-2）H（-1）用大约5％的总盐拒绝确定。

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