聚乙烯醇
吸附剂
化学工程
硅酸钠
水溶液
石油泄漏
多孔性
戊二醛
材料科学
肺表面活性物质
乳状液
吸附
有机化学
乙烯醇
润湿
聚合物
接触角
复合材料
化学
石油工程
工程类
作者
Qunying Wang,Qing X. Li,M. Usman Akram,Safdar Ali,Jun Nie,Xiaoqun Zhu
出处
期刊:Langmuir
[American Chemical Society]
日期:2018-11-28
卷期号:34 (51): 15700-15707
被引量:32
标识
DOI:10.1021/acs.langmuir.8b03270
摘要
The development of the oil industry brings the critical problem of ocean pollution by oil spill or fossil fuels. The use of materials for water/oil separation is one of the effective approaches to solve this crisis. Polyvinyl alcohol (PVA) has been used to prepare water/oil separation materials. Currently, glutaraldehyde has been employed as the cross-linking agent, which is well known to be toxic and environmentally unfriendly. Moreover, it is difficult to deal with the disposal of the Across-linked material. Here, we propose a strategy of fabricating macroporous material which was prepared by PVA and sodium silicate (Na2SiO3) in aqueous solution. Following through with the one-step method of sol-gel reaction of hydroxyl groups with trimethoxy(octadecyl)silane, the low surface energy substance was grafted on the macroporous material and a super-hydrophobic macroporous membrane for water/oil separation was prepared. As oil sorbent, the as-prepared dried super-hydrophobic PVA/Na2SiO3 porous materials (PSD6S) have the adsorption capacity of 1.8-7.0 g/g for oil uptake, which depends on the type of oil liquid. Typically, the separation efficiency of this material could reach more than 99% even after 10 times of use without the help of ambient pressure. It is noteworthy that the as-prepared samples could be easily decomposable and dissolvable completely in acidic medium at a rapid rate.
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