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Sci Rep

Title:		Preparation and structures of PEBA gas separation membrane modified by fumed silica for oil vapor separation
Author(s):		Xu R; Wang B; Cai Y;
Address:		"School of Naval Architecture and Maritime, Zhejiang Ocean University, Zhoushan, 316000, Zhejiang, China. School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, 316000, Zhejiang, China. wangbeifu@126.com. School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan, 316000, Zhejiang, China"
Journal Title:		Sci Rep
Year:		2022
Volume:		20220119
Issue:		1
Page Number:		1025 -
DOI:		10.1038/s41598-022-05064-7
ISSN/ISBN:		2045-2322 (Electronic) 2045-2322 (Linking)
Abstract:		"Composite membranes were fabricated with polyethersulfone as a microporous substrate and polyether block amide (PEBA) as a selective layer to achieve efficient recovery of volatile organic compounds (VOCs). Fumed silica was mixed into PEBA for modification. The top thin layers with different percentage of fumed silica in PEBA were prepared by spin-coating. Structure and performance of membranes with and without a modification were characterized. The results showed that fumed silica in an ultra-thin selective layer significantly influenced the hydrophobicity of the membranes. The higher the content of fumed silica, the higher the hydrophobicity of the membranes was. The maximum content of added fumed silica was 0.6 wt%. When the proportion of fumed silica reached 0.6 wt%, the contact angle could reach 95.8 degrees , which was 56% higher than that of the unmodified one. The structure of the membrane remained unchanged. Moreover, the separation performance was evaluated by removing VOCs from a mixture of oil vapor and nitrogen. The VOCs permeance tended to grow with an increase in the content of fumed silica. When the content was 0.6 wt%, the membrane exhibited better comprehensive performance. Its vapor flux rate was 117.8 ml/min, which was 153% higher than that without a modification. Its separation coefficients for ethane, propane, cyclopropane, isobutane and n-butane were 29.3, 29.9, 24.9, 30.7, and 34.0 respectively"
Keywords:
Notes:		"PubMed-not-MEDLINEXu, Rong Wang, Beifu Cai, Yuting eng England 2022/01/21 Sci Rep. 2022 Jan 19; 12(1):1025. doi: 10.1038/s41598-022-05064-7"