Synthesis of a biomimetic zwitterionic pentapolymer to fabricate high-performance PVDF membranes for efficient separation of oil-in-water nano-emulsions

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作者
Nadeem Baig
Zeeshan Arshad
Shaikh A. Ali
机构
[1] King Fahd University of Petroleum and Minerals,Interdisciplinary Research Center for Membranes and Water Security
[2] King Fahd University of Petroleum and Minerals,Chemistry Department
[3] King Fahd University of Petroleum and Minerals,Interdisciplinary Research Center for Advanced Materials
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Scientific Reports | / 12卷
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摘要
Oily wastewater from industries has an adverse impact on the environment, human and aquatic life. Poly(vinylidene fluoride) (PVDF) membrane modified with a zwitterionic/hydrophobic pentapolymer (PP) with controlled pore size has been utilized to separate oil from water from their nano-emulsions. The PP has been synthesized in 91% yield via pentapolymerization of four different diallylamine salts [(CH2=CHCH2)2NH+(CH2)x A−], bearing CO2−, PO3H−, SO3−, (CH2)12NH2 pendants, and SO2 in a respective mol ratio of 25:36:25:14:100. Incorporating PP into PVDF has shown a substantially reduced membrane hydrophobicity; the contact angle decreased from 92.5° to 47.4°. The PP-PVDF membranes have demonstrated an excellent capability to deal with the high concentrations of nano-emulsions with a separation efficiency of greater than 97.5%. The flux recovery ratio (FRR) of PP-5 incorporated PVDF membrane was about 82%, which was substantially higher than the pristine PVDF.
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