Citation: PENG Jihua, GUO Guibao. Preparation and Properties of Oil/Water Separation Membranes Synthesized via One-Step Grafting Poly(styrene sulfonic acid) onto Poly(vinylidene fluoride) Modified by Tetramethylammonium Hydroxide[J]. Chinese Journal of Applied Chemistry, ;2019, 36(8): 909-916. doi: 10.11944/j.issn.1000-0518.2019.08.180370 shu

Preparation and Properties of Oil/Water Separation Membranes Synthesized via One-Step Grafting Poly(styrene sulfonic acid) onto Poly(vinylidene fluoride) Modified by Tetramethylammonium Hydroxide

PENG Jihua ^a ,
GUO Guibao ^b,,

a.
School of Materials and Metallurgy, Inner Mongolia University of Science & Technology, Baotou, Inner Mongolia 014010, China
b.
School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou, Inner Mongolia 014010, China

Corresponding author: GUO Guibao, ggb66733@sohu.com
Received Date: 19 November 2018
Revised Date: 4 March 2019
Accepted Date: 3 April 2019

Fund Project: the Inner Mongolia Autonomous Region Natural Science Foundation 2017MS(LH)0515the National Natural Science Foundation of China 21463016the Scientific Research Projects in Colleges and Universities NJZY18148Supported by the National Natural Science Foundation of China(No.21463016), the Inner Mongolia Autonomous Region Natural Science Foundation(No.2017MS(LH)0515), the Scientific Research Projects in Colleges and Universities(No.NJZY18148)

Figures(8)

Poly(styrene sulfonic acid)-graft-poly(vinylidene fluoride)(PSSA-g-PVDF) membrane was prepared via phase bulk modification with tetramethylammonium hydroxide(TMAH), grafting styrene sulfonic acid(SSA) onto PVDF with benzoyl peroxide(BPO) as an initiator. After that, the copolymer was casted into a flat membrane via immersion phase inversion. It was investigated that TMAH content has effect on grafting degree(GD) and the oil/water separation membrane performance of PSSA. At the same time, Fourier transform infrared spectrum(FTIR), scanning electron microscope(SEM) and video optical contact angle measuring test were adopted to measure the membrane structure and surface contact angle. The results showed that the partial HF was eliminated from PVDF by TMAH forming carbon double bonds and styrene sulfonic acid was grafted onto the modified PVDF skeletons. The GD of PSSA-g-PVDF membrane increased as more TMAH used. The optimized hydrophilicity of modified PVDF membrane was obtained with 20% of TMAH, when the GD of membrane was 22.1%. The contact angle of the separation membrane was reduced to 37.2° within 30 s. Water flux was 643.3 L/(m·h). Rejection rate was 90.6% and the water flux recovery rate was 93.7%. The attenuation rate was 7.1%. The cycle test showed that the water flux recovery rate and oil-water flux recovery rate of the membrane were both above 90%.
- oil/water separation membrane,
- one-step,
- tetramethylammonium hydroxide,
- poly(vinylidene fluoride),
- styrene sulfonic acid
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