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Research on the structure control and performance of PVDF membrane for desulfurization application

Authors： LI Han1,2, YE Hui1,2, WANG Yan-bing1,2, ZHANG Yu-zhong1,2, LI Hong1,2, CHEN Ying3

Units： 1. School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China；2. State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300387, China；3. The Institute of Seawater Desalination and Multipurpose Utilization, SOA(Tianjin), Tianjin 300192, China

KeyWords： PVDF; Zonyl 8740; membrane contactor; desulfurization

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2015, 35(1):35-41

Abstract：

The polyvinylidene fluoride (PVDF) membranes have been prepared by phase inversion method with dimethylacetamide (DMAc) as solvent. The effects of hydrophilic/hydrophobic additives on the membrane structure, contact angle and gas permeability were investigated. By coating fluorine-containing surfactant Zonyl 8740, the PVDF membranes were modified to obtain hydrophobic surface. ATR-FTIR, FE-SEM and contact angle on membranes were characterized, and the corresponding desulfurization performance was evaluated. The results showed that the additive improved the water contact angle and hydrophobic performance of the membrane. The additive type had obvious influence on the gas permeability of membranes, and the max ventilation property of PVDF membrane come to 85.6 m3/m2·h under 20℃ and 0.01 MPa conditions. Through Zonyl 8740 modification, the PVDF membranes showed excellent hydrophobicity, and the water contact angle was 133.5 ° with 81.3% of sulfur dioxide removal efficiency.

Funds：

国家自然科学基金（50973083,51173132）；2013海洋公益专项项目（201305004-5）；中空纤维膜材料与膜过程省部共建国家重点实验室培育基地开放课题。

AuthorIntro：

李涵（1988-），女，天津人，在读硕士，师承张玉忠教授，从事膜材料研究。

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