Salt-induced and alcohol-induced hydrophobic and underoil superhydrophobic poly (vinylidene fluoride) membranes for effective oil collection
Salt-induced and alcohol-induced hydrophobic and underoil superhydrophobic poly (vinylidene fluoride) membranes for effective oil collection
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DOI：
10.1016/j.jece.2020.104714
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发表时间：
2020-11
影响因子：
7.7
通讯作者：
Hai-Ming Song;Lijing Zhu;Gang Wang;Hao Yang;Z. Zeng;Linghui Wang
中科院分区：
文献类型：
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作者：
Hai-Ming Song;Lijing Zhu;Gang Wang;Hao Yang;Z. Zeng;Linghui Wang
以水、酒精和饱和盐溶液为非溶剂，采用一步非溶剂诱导相分离（NIPS）法制备聚偏氟乙烯（PVDF）多孔膜。受混凝作用的影响，形成了多种形态和结晶形式。水诱导和醇诱导的PVDF膜表面以强α相和弱β相为主，而饱和盐溶液诱导的膜表面没有α相，出现了新的γ相和增加的β相。同时，获得了高粗糙度和丰富的微纳结构，形成疏水表面和油底超疏水表面。与工业膜相比，所制备的膜具有优异的透油性能，良好的稳定性和再生能力，以及优异的防污性能。并利用所制备的膜制备了简单的采油袋。该装置可将浮油放入水/油混合物中进行吸收和回收，在采油领域具有广阔的应用前景。
A one-step and facile non-solvent induced phase separation (NIPS) was used to prepare poly (vinylidene fluoride) (PVDF) porous membrane using water, alcohol and saturated salt solution as the non-solvent. Affected by the coagulation, various morphology and crystalline forms were formatted. Strong α-phase and weak β-phase dominated the surface of the water-induced and alcohol-induced PVDF membranes, while new γ-phase and increased β-phase appeared on the saturated salt solution-induced membranes without α-phase. Meanwhile, high roughness and rich micro/nanostructure were obtained, leading to hydrophobic and underoil superhydrophobic surfaces. The as-prepared membranes exhibited excellent oil permeation compared with the commercial membranes, good stability and regeneration, and outstanding antifouling performances. Furthermore, a simple oil recovery bag was fabricated by the fabricated membranes. Floating oil can be absorbed and recovered by the device when put it into the water/oil mixture, which has a wide prospect in oil recovery field.