A study on the fabrication of porous PVDF membranes by in-situ elimination and their applications in separating oil/water mixtures and nano-emulsions | |
Department | 固体润滑国家重点实验室 |
Chen, Liwei1,2; Si YF(司一帆)1,2; Zhu H(朱海)1,2; Jiang T(姜婷)1,2; Guo ZG(郭志光)1,2; Guo ZG(郭志光) | |
2016 | |
Source Publication | Journal of Membrane Science |
ISSN | 0376-7388 |
Volume | 520Pages:760-768 |
Abstract | The influences and treatments of oil/water mixtures have been plaguing people for many years. To deal with it, the fabrication of separation membranes becomes a significant technology in the application to oily wastewater treatment. Except for the well-known phase inversion method which is promising for polymeric separation membrane fabrication, another imaginable method referred to as in-situ elimination here still suffers from major difficulty in the uniform dispersion of dissoluble micro/nano-particles in polymeric matrix. Aiming at in-situ elimination method, a series of free-standing thin PVDF membranes with interconnected porous structures are fabricated based on low-cost starting materials through a simple process of tape-casting, drying and immersing, in the presence of pore-forming agent of citric acid monohydrate (CAM). Substantially, the pore formation mechanism is studied, which is resulted from the recrystallization of pore-forming agent (CAM) and subsequent in-situ elimination in NaHCO3 solution. The fabricated free-standing porous PVDF membrane with thickness of ~5 µm and surface pore size of <500 nm showed great flexibility and superoleophilic, under-oil superhydrophobic, anti-water-fouling properties. For the porosity and selective wettability, their applications in oil/water separation are studied also and the results show that the PVDF membrane can separate not only immiscible oil/water mixtures quickly but also various surfactant-stabilized water-in-oil nanoscale emulsions, with filtration flux up to 318 L m−2 h−1 and separation efficiency of 99.81% under the action of self-gravity. To the best of our knowledge, this is the first time the polymeric separation membranes have been positively fabricated by in-situ elimination, which provides a new avenue for porous polymeric membrane fabrication in membrane science field and shows the application in oil/water or emulsion separation. This work provides a new porous membrane-forming method and an energy-efficient strategy for separating immiscible oil/water mixtures and surfactant-stabilized water-in-oil nano-emulsions. |
Keyword | Pvdf Porous Membrane Oil/water Separation Emulsion Separation In-situ Elimination |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.memsci.2016.08.026 |
Funding Organization | the National Nature Science Foundation of China (No. 51522510);the ‘‘Top Hundred Talents’’ Program of Chinese Academy of Sciences (Y10230YBR1) |
Indexed By | SCI |
If | 6.035 |
Language | 英语 |
Funding Project | 空间润滑材料组 |
compositor | 第二作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/21042 |
Collection | 固体润滑国家重点实验室(LSL) |
Corresponding Author | Guo ZG(郭志光) |
Affiliation | 1.Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, China 2.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
Recommended Citation GB/T 7714 | Chen, Liwei,Si YF,Zhu H,et al. A study on the fabrication of porous PVDF membranes by in-situ elimination and their applications in separating oil/water mixtures and nano-emulsions[J]. Journal of Membrane Science,2016,520:760-768. |
APA | Chen, Liwei,Si YF,Zhu H,Jiang T,Guo ZG,&郭志光.(2016).A study on the fabrication of porous PVDF membranes by in-situ elimination and their applications in separating oil/water mixtures and nano-emulsions.Journal of Membrane Science,520,760-768. |
MLA | Chen, Liwei,et al."A study on the fabrication of porous PVDF membranes by in-situ elimination and their applications in separating oil/water mixtures and nano-emulsions".Journal of Membrane Science 520(2016):760-768. |
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1-s2.0-S037673881631(3208KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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