GO-enhanced PVA mixed matrix membranes for dehydration of alcohol/water mixture via pervaporation
Source abstract
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.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Membrane Separation and Gas Transport · Membrane Separation Technologies · Graphene research and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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