A solvent-resistance OTS/PDA/O-PASS composite membrane for water-in-oil emulsions separation |
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| Authors: | Faming Yang Chen Xiong Yingfu Lian Xiaojun Wang Zhimei Wei Shengru Long Gang Zhang Jie Yang |
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| Affiliation: | 1. Polymer Science and Engineering college, Sichuan University, Chengdu, China;2. Analytical and Testing Center, Sichuan University, Chengdu, China;3. Analytical and Testing Center, Sichuan University, Chengdu, China State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu, China |
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| Abstract: | Water-in-oil emulsions separation plays a critical role in industrial wastewater treatment. Membrane technology has attracted much interest in water-in-oil emulsions separation field for its excellent separation performance and facile processing method. However, versatile membrane with better solvent-resistance is still absent in chemical industry. In this work, oxidized polyarylene sulfide sulfone (O-PASS) membrane was severed as substrate, on which a hydrophobicity surface was built via coating of octadecyltrichlorosilane (OTS). And polydopamine (PDA) layer was employed and acted as connector between OTS and O-PASS membrane due to its abundant active hydroxyl group. The maximum water contact angle was 132.6° indicating good hydrophobicity of the membrane. Finally, the OTS/PDA/O-PASS composite membranes showed good separation performance for corrosive emulsions: the rejection and flux were 93.0% and 10.0 L/m2h for water-in-dichloromethane emulsions, and the rejection and flux were 92.3% and 34.6 L/m2h for water-in-n-hexane emulsions. The OTS/PDA/O-PASS composite membrane is a new candidate membrane for water-in-oil emulsions separation. In addition, the superior performance of the composite membrane under harsh environment conditions ensures its usefulness in resistance aggressive solvent. |
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| Keywords: | membranes oil and gas separation techniques |
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