Superhydrophilic and mechanical robust PVDF nanofibrous membrane through facile interfacial Span 80 welding for excellent oil/water separation
Superhydrophilic and mechanical robust PVDF nanofibrous membrane through facile interfacial Span 80 welding for excellent oil/water separation
复制标题
超亲水且机械坚固的 PVDF 纳米纤维膜，通过轻松的界面 Span 80 焊接实现出色的油/水分离
DOI：
10.1016/j.apsusc.2019.04.214
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发表时间：
2019-08-15
影响因子：
6.7
通讯作者：
Tang, Chuyang Y.
中科院分区：
文献类型：
--
作者：
Ding, Yajie;Wu, Jindan;Tang, Chuyang Y.
我们报告了一种新的和简便的焊接策略，使用Span 80，同时提高电纺聚偏氟乙烯（PVDF）纳米纤维膜的机械鲁棒性和超亲水性。利用Span 80的两亲性，Span 80的疏水链段与PVDF之间具有很强的亲和力，使Span 80胶束能够吸附PVDF纳米纤维。所制备的PVDF纳米纤维膜同时表现出改善的应力（从1.7 +/-0.3MPa至8.8 +/-0.6MPa）。同时，Span 80在PVDF膜表面的自组装赋予了膜超亲水性。改性膜的水接触角（WCA）和水下油接触角（UOCA）分别接近0和154.9 +/- 2度。该膜对水包1，2-二氯乙烷乳液的水渗透率为18，482.7 +/- 287.3 Lm（-2）h（-1）bar（-1），分离效率为96.3%。焊接的PVDF纳米纤维膜表现出非凡的鲁棒性，耐水和水包油乳液的长期洗涤。
We report a novel and facile welding strategy using Span 80 to simultaneously enhance the mechanical robustness and superhydrophilicity of an electrospun poly(vinylidene fluoride) (PVDF) nanofibrous membrane. By taking advantage of its amphiphilic property, Span 80 micelle is able to attach PVDF nanofibers due to the strong affinity between the hydrophobic segments of Span 80 and PVDF. The as-prepared PVDF nanofibrous membrane exhibited simultaneously improved stress (from 1.7 +/- 0.3 MPa to 8.8 +/- 0.6 MPa). Meanwhile, supherhy-drophilic property was endowed through the self-assembly of Span 80 on the hierarchical surface of PVDF membrane. Water contact angle (WCA) and under-water oil contact angle (UOCA) of the modified membrane was nearly 0 and 154.9 +/- 2 degrees, respectively. This membrane had a water permeability of 18,482.7 +/- 287.3 Lm(-2) h(-1)bar(-1) for 1, 2-dichloroethane-in-water emulsion with a separation efficiency of 96.3%. The welded PVDF nanofibrous membrane exhibited extraordinary robustness, resisting to long-term washing of water and oil-in-water emulsion.