Electrospun polyvinylidene fluoride-based fibrous nanocomposite membranes reinforced by cellulose nanocrystals for efficient separation of water-in-oil emulsions
Electrospun polyvinylidene fluoride-based fibrous nanocomposite membranes reinforced by cellulose nanocrystals for efficient separation of water-in-oil emulsions
复制标题
纤维素纳米晶体增强的电纺聚偏二氟乙烯纤维纳米复合膜可有效分离油包水乳液
DOI：
10.1016/j.memsci.2018.12.057
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发表时间：
2019-04-01
影响因子：
9.5
通讯作者：
Han, Guangping
中科院分区：
文献类型：
--
作者：
Wang, Xue;Cheng, Wanli;Han, Guangping
以聚偏氟乙烯(PVDF)为原料，通过电纺法制备了疏水亲油的纳米纤维膜。考察了不同负荷对膜微观结构、力学性能、水油接触角和油包水乳状液分离效果的影响。结果表明，通过优化膜的微观结构和孔隙率，提高了纤维膜的乳化分离通量。对于甲苯水乳状液，当其加入量为4wt%时，膜通量为5842 L m(-2)h(-1)，分离效率为97%，是纯PVDF膜(1495 L m(-2)h(-1))的4倍。最重要的是，随着数控加载量的增加，膜表现出良好的机械性能，同时易于回收，这是环保的，灵活的和可持续的。
A hydrophobic-oleophilic nanofibrous membrane was successfully produced by incorporating cellulose nanocrystals (CNC) into polyvinylidene fluoride (PVDF) via an electrospinning process. The effects of levels of CNC loading on membrane microstructure, mechanical properties, water and oil contact angle and efficacy of separating oil from water-in-oil emulsions were investigated. The results demonstrated that the incorporation of CNC improved the flux of emulsion separation of the fabricated fibrous membranes by optimizing microstructure and porosity. For water-in-toluene emulsions, a higher flux of 5842 L m(-2) h(-1) with high separation efficiency of 97% was obtained for membranes with CNC addition of 4 wt%, 4 times greater than that of pure PVDF membrane (1495 L m(-2) h(-1)). Most importantly, as increasing CNC loading levels, membranes demonstrated good mechanical performance while being easily recycled, which is environmentally friendly, flexible and sustainable.