We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
GO-enhanced PVA mixed matrix membranes for dehydration of alcohol/water mixture via pervaporation.
- Authors
Xiang, Nan; Li, Lin; Wang, Hua; Qian, Jiang; Wang, Tonghua
- Abstract
Graphene oxide (GO)—polyvinyl alcohol (PVA) mixed matrix membranes (MMMs) were prepared on the surface of polysulfone (PSF) ultrafiltration basement membrane by the spray coating method for the dehydration of ethanol and isopropanol via pervaporation (PV). PVA has an excellent membrane-forming property and is rich in hydroxyl groups. GO nanosheets can be cross-linked with PVA that enables GO nanosheets to be well dispersed in PVA without interfacial defects. The effects of GO concentration and the size of GO nanosheets on the separation performance of MMMs were investigated. A complete analysis of different mixtures (ethanol/water = 70:30, 80:20, 90:10 and 95:5 wt.%, isopropanol/water = 80:20 wt.%) and different temperatures of mixed solution for the PV performance of GO-PVA MMMs was studied. When the ratio of mGO/mPVA is 2.0%, the GO-PVA MMMs provided the best PV performance for 90 wt% ethanol–water solution at 50 °C. The permeation flux and separation factor of GO-PVA MMMs were 263.01 g/(m2 h) and 115.48, respectively. With the decrease of the size of GO nanosheets, more GO nanosheets enter the PVA matrix, and the PV performance of the GO-PVA MMMs is increased because the GO nanosheets have selective pores and form a cross-linking structure with PVA. For isopropanol–water mixed solution, the separation factor of GO-PVA MMMs was much higher than that for ethanol–water mixed solution at the same experimental condition.
- Subjects
PERVAPORATION; POLYVINYL alcohol; ETHANOL; BASAL lamina; DEHYDRATION; GRAPHENE oxide; HYDROXYL group
- Publication
Journal of Materials Science, 2023, Vol 58, Issue 36, p14612
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-023-08944-z