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首页> 外文期刊>RSC Advances >Manipulating the multifunctionalities of polydopamine to prepare high-flux anti-biofouling composite nanofiltration membranes
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Manipulating the multifunctionalities of polydopamine to prepare high-flux anti-biofouling composite nanofiltration membranes

机译：操纵聚二胺的多功能性以制备高通量抗生物污垢复合纳米滤膜

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A high-flux anti-biofouling composite nanofiltration (NF) membrane was facilely prepared by simultaneously manipulating the three functionalities (adhesion, reaction and separation) of polydopamine (PDA) via a two-step dip-coating method. Stemming from the adhesion and separation functionalities, PDA was in situ deposited on a polyethersulfone (PES) substrate and formed an ultrathin dense layer, which endowed the membrane with a satisfying rejection for a broad range of small organic molecules (methyl orange of 65.65%, orange GII of 79.05%, congo red of about 98.78%, methyl blue and alcian blue of nearly 100%) and a relatively high water flux of 249.45 L m ~(?2) h ~(?1) MPa ~(?1) under the operation pressure of 0.2 MPa. Stemming from the reaction functionality, PDA could reduce silver ions when exposed to AgNO _(3) solution and trigger the in situ generation of silver nanoparticles (AgNPs) on the membrane surface, which conferred excellent anti-biofouling properties to the membrane with low bioadhesion and high antibacterial efficiency (almost 100%) against Escherichia coli . Moreover, the adhesion and reaction functionalities have a close relation to the separation functionality of PDA. The effects of PDA deposition time, AgNO _(3) treatment time and AgNO _(3) concentration on the separation performance of the resulting composite NF membranes were systematically investigated.
机译：通过两步浸涂方法同时操纵多多胺（PDA）的三种功能（粘合，反应和分离，通过两步浸涂方法同时操纵多碳胺（粘附性，反应和分离，术后施加高通量抗生物污染复合纳米滤膜（NF）膜。源于粘附和分离功能，PDA原位沉积在聚醚砜（PES）底物上沉积并形成超致密层，其具有令人满意的抑制膜，用于宽范围的小型有机分子（甲基橙为65.65％， Orange GII为79.05％，刚果红色约为98.78％，甲基蓝色和Alcian蓝的近100％）和相对高的水通量为249.45，Δ2）h〜（？1）mpa〜（？1）在0.2MPa的操作压力下。从反应功能中源于反应功能，PDA可以在暴露于AgNo _（3）溶液时减少银离子，并引发膜表面上的银纳米颗粒（AgNP）的原位生成，这对具有低生物粘附的膜赋予膜优异的抗生物污垢性能对大肠杆菌的高抗菌效率（近100％）。此外，粘附和反应官能团与PDA的分离功能密切相关。系统研究了PDA沉积时间，AgNo _（3）处理时间和AgNO _（3）浓度对所得复合NF膜的分离性能的影响。

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