Enhanced ethanol pervaporative selectivity of polydimethylsiloxane membranes by incorporating with graphene oxide@silica core‐shell structure. Issue 6 (25th November 2022)

• Record Type: Journal Article
• Authors: Peng, Ping; Lan, Yongqiang; Xu, Amei; Liu, Mengyao
• Is Part Of: Journal of applied polymer science. Volume 140:Issue 6(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-25
• Subjects: core‐shell -- ethanol perm‐selectivity -- graphene oxide -- pervaporation; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.53449
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: A graphene oxide@silica core‐shell structure (GO@silica) was prepared and embedded into the polydimethylsiloxane (PDMS) to fabricate mixed matrix membranes (MMMs). Meanwhile, (3, 3, 3‐trifluoropropyl)triethoxysilane (TFTS) was employed to improve the compatibility between PDMS and GO@silica and create a hydrophobic membrane surface for improving the ethanol pervaporative performance. The scanning electron microscope (SEM) result showed that the resultant PDMS/GO@silica MMMs were smooth and defect‐free. Meanwhile, the increase in hydrophobicity, swelling degree, and PV performance was achieved because of the incorporation of the modified GO@silica. The maximal separation factor of 11.43 coupled with a high permeation flux of 223 g·m −2 ·h −1 was observed when separating a 10 wt. % ethanol/water mixture at 30°C. Moreover, the MMMs displayed a stable PV performance during a 168‐h continuous operation. Abstract :