具有超疏水性和抗菌特性的分层功能化可生物降解的PLA电纺纳米纤维膜，用于油/水分离<a href="#fn1" title="提供电子补充信息（ESI）。参见DOI：10.1039 / c8nj03112f">†</a>,New Journal of Chemistry

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具有超疏水性和抗菌特性的分层功能化可生物降解的PLA电纺纳米纤维膜，用于油/水分离 †
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2018-09-21 00:00:00 , DOI: 10.1039/c8nj03112f
Lejing Liu _{1,

2,

3} , Weizhong Yuan _{1,

2,

3}

Affiliation

近年来，超润湿性材料在油/水分离中的应用得到了迅速发展。在这项工作中，用聚多巴胺（PDA）的生物启发涂层，银纳米颗粒（AgNPs）的固定化以及随后的氟化硫醇的超疏水化制备了一种分层的表面改性的可生物降解的静电纺丝纳米纤维聚乳酸（PLA）膜。用于高效油/水分离的介质。由于分层粗糙结构和低表面能化学物质的协同作用，制得的膜表现出超疏水性（水接触角= 158.6°±1.2°，滑动角= 2.5°±0.2°）和超亲油性（油接触角） = 0°）。高渗透通量（2664.3±48.2 L m ^-2 h ^-1）和在重力驱动的油/水分离过程中获得了理想的分离效率（98.4±1.0％）。而且，该膜可以有效地分离油包水乳液。此外，在重复分离20个循环后，保持了稳定的疏水性和粗糙度，表明良好的可回收性。此外，该膜还显示出极低的水粘附性能，令人满意的防污性能和优异的抗菌性能（抗菌活性达到99.0±0.4％），这使其成为用于含油废水处理的有前途的可生物降解的候选材料。

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A hierarchical functionalized biodegradable PLA electrospun nanofibrous membrane with superhydrophobicity and antibacterial properties for oil/water separation†

In recent years, the application of superwettability materials in oil/water separation has been developed rapidly. In this work, a hierarchical surface-modified biodegradable electrospun nanofibrous poly(lactic acid) (PLA) membrane was fabricated with the bioinspired coating of polydopamine (PDA), the immobilization of silver nanoparticles (AgNPs) and the subsequent superhydrophobization of the fluorinated thiol as a medium for high-efficient oil/water separation. Due to the synergistic effect of the hierarchical rough structure and the low surface energy chemicals, the as-prepared membrane exhibited superhydrophobicity (water contact angle = 158.6° ± 1.2°, sliding angle = 2.5° ± 0.2°) and superoleophilicity (oil contact angle = 0°). A high permeation flux (2664.3 ± 48.2 L m⁻² h⁻¹) and desirable separation efficiency (98.4 ± 1.0%) were achieved during the gravity-driven oil/water separation. Moreover, the membrane could separate the water-in-oil emulsion effectively. Furthermore, the stable hydrophobicity and roughness were maintained after 20 cycles of repeated separation, indicating the favorable recyclability. Besides, the membrane showed extremely low water-adhesion performance, desirable antifouling properties and superior antibacterial properties (antibacterial activity reached 99.0 ± 0.4%), which would make it a promising biodegradable candidate for oily wastewater treatment.

更新日期：2018-09-21

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