Facile fabrication of nanofiber- and micro/nanosphere-coordinated PVDF membrane with ultrahigh permeability of viscous water-in-oil emulsions
Facile fabrication of nanofiber- and micro/nanosphere-coordinated PVDF membrane with ultrahigh permeability of viscous water-in-oil emulsions
复制标题
轻松制造具有粘性油包水乳液超高渗透性的纳米纤维和微/纳米球配位的 PVDF 膜
DOI：
10.1039/c8ta01539b
复制
发表时间：
2018-04-28
影响因子：
11.9
通讯作者：
Liu, Fu
中科院分区：
文献类型：
--
作者：
Wu, Jindan;Ding, Yajie;Liu, Fu
为实现乳化油的高效净化，采用静电纺丝技术制备了超疏水、超亲油和油下超疏水聚偏氟乙烯（PVDF）纳米纤维膜。PVDF纳米纤维膜表现出纳米纤维和微/纳米球的同步组合，这是通过单独控制静电纺丝溶液的PVDF浓度产生的。所制备的PVDF纳米纤维膜表现出152° ± 2°的水接触角，空气中的油接触角为0°，油-水接触角为152° ± 1°，这归因于固有的低表面能和由纳米纤维和微/纳米球组成的独特结构。由于油下的超疏水性、分级结构和高孔隙率（> 95%），复合膜显示出极高的渗透率（88 166 ± 652 L m−2 h−1 bar−1），分离效率高于99%，比以前的发现高几个数量级。 此外，纳米纤维膜表现出稳健的连续分离，表明其可扩展应用于纯化乳化油。
To achieve highly efficient purification of emulsified oil, a superhydrophobic, superoleophilic and under-oil superhydrophobic poly(vinylidene fluoride) (PVDF) nanofibrous membrane was developed through a facile electrospinning strategy. The PVDF nanofibrous membrane exhibited a synchronous combination of nanofibers and micro/nanospheres, which was produced by solely controlling the PVDF concentration of the electrospun solutions. The fabricated PVDF nanofibrous membrane exhibited a water contact angle of 152° ± 2°, oil contact angle of 0° in air and under-oil–water contact angle of 152° ± 1° due to the inherently low surface energy and unique structures composed of nanofibers and micro/nanospheres. Thanks to the under-oil superhydrophobicity, hierarchical structure and high porosity (∼95%), the composite membrane showed extremely high permeability of 88 166 ± 652 L m−2 h−1 bar−1 with separation efficiency higher than 99%, which was few orders of magnitude higher than the previous findings. Moreover, the nanofibrous membrane exhibited robust continuous separation, indicating its scalable application for purifying emulsified oil.