Next Article in Journal
Laser Direct Metal Deposition of 2024 Al Alloy: Trace Geometry Prediction via Machine Learning
Previous Article in Journal
Machining of Fibre Reinforced Plastic Composite Materials
Open AccessArticle

Poly(vinylidene Fluoride-Hexafluoropropylene) Porous Membrane with Controllable Structure and Applications in Efficient Oil/Water Separation

State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Separation Membranes, Tianjin Polytechnic University, No. 399, Binshui Road, Xiqing District, Tianjin 300387, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(3), 443; https://doi.org/10.3390/ma11030443
Received: 1 February 2018 / Revised: 6 March 2018 / Accepted: 18 March 2018 / Published: 18 March 2018
(This article belongs to the Section Thin Films)
Poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) porous membranes are fabricated via thermally induced phase separation (TIPS) with mixed diluent (dibutyl phthalate (DBP)/dioctyl phthalate (DOP)). The effects of mixed diluent are discussed in detail in term of morphology, mean pore size, selective wettability, etc. The results show that the membrane structure changes from spherulitic to bicontinuous with the change of DBP/DOP ratio. It is also found that the degree of crystallization decreases with the decrease of DBP/DOP ratio in mixed diluent. When liquid–liquid (L-L) phase separation precedes solid–liquid (S-L) phase separation, the obtained membranes have outstanding hydrophobicity and lipophilicity, excellent mechanical property. Additionally, the PVDF-HFP hybrid membranes are prepared with silica (SiO2) particles and the effect of SiO2 content on structure and properties is discussed. It is found that the PVDF-HFP hybrid membrane with 2 wt % SiO2 (M3-S2) has better properties and higher filtration rate and separation efficiency for surfactant-stabilized water-in-oil emulsion separation. Moreover, the membrane M3-S2 also exhibits excellent antifouling performance for long-running. View Full-Text
Keywords: PVDF-HFP; thermally induced phase separation; mixed diluent; hybrid membrane; water-in-oil emulsion separation PVDF-HFP; thermally induced phase separation; mixed diluent; hybrid membrane; water-in-oil emulsion separation
Show Figures

Graphical abstract

MDPI and ACS Style

Wang, X.; Xiao, C.; Liu, H.; Huang, Q.; Hao, J.; Fu, H. Poly(vinylidene Fluoride-Hexafluoropropylene) Porous Membrane with Controllable Structure and Applications in Efficient Oil/Water Separation. Materials 2018, 11, 443.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop