Preparation and properties of elliptic leaves SiO<sub>2</sub>/polyvinyl alcohol pervaporation composite membranes

WU Yuping; WANG Qianting; SUN Wei; ZHOU Zhonghua; XIE Zongli; SONG Mingyu

doi:10.13801/j.cnki.fhclxb.20210909.006

Volume 39 Issue 6

Jun. 2022

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WU Yuping, WANG Qianting, SUN Wei, et al. Preparation and properties of elliptic leaves SiO2/polyvinyl alcohol pervaporation composite membranes[J]. Acta Materiae Compositae Sinica, 2022, 39(6): 2783-2791. doi: 10.13801/j.cnki.fhclxb.20210909.006

Citation:

WU Yuping, WANG Qianting, SUN Wei, et al. Preparation and properties of elliptic leaves SiO₂/polyvinyl alcohol pervaporation composite membranes[J]. Acta Materiae Compositae Sinica, 2022, 39(6): 2783-2791. doi: 10.13801/j.cnki.fhclxb.20210909.006

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Preparation and properties of elliptic leaves SiO₂/polyvinyl alcohol pervaporation composite membranes

doi: 10.13801/j.cnki.fhclxb.20210909.006

1.
School of Materials Science and Engineering, Fujian University of Technology, Fuzhou 350118, China
2.
School of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, China
3.
Fujian Provincial Key Laboratory of Advanced Materials, College of Materials, Xiamen University, Xiamen 361005, China
4.
CSIRO Manufacturing, Private bag 10, Melbourne 3169, Australia

Received Date: 2021-05-19
Accepted Date: 2021-08-25
Rev Recd Date: 2021-08-01

Available Online: 2021-09-09

Publish Date: 2022-06-01

Abstract

Abstract

How to prepare high-performance separation membranes with morphology controlled and well-dispersed nanoparticles, has been a hotspot and difficulty in the field of membrane separation. Mixed matrix membranes were prepared by crosslinking polyvinyl alcohol (PVA), maleic acid (MA) and SiO₂ via an aqueous sol-gel route and solution casting method. The membrane was characterized by SEM, FTIR, XRD and tested for its perfor-mance in pervaporation separation of ethanol/water mixtures with feed ethanol concentration of 97wt% at 50℃. Membrane characterization results reveal that SiO₂/crosslinked PVA membrane shows that elliptic leaves SiO₂ nano-particles cover the surface and act as a water prescreening layer, are well disperse within the polymer matrix. It results in a significantly enhanced effect in both flux and selectivity. The membranes achieve high water flux of 0.072 kg·m⁻²·h⁻¹ and separation factor of 12301 for separation of 97wt% ethanol aqueous solution. The enhanced membrane performance can be attributed to the surface prescreening ability and dense crosslinking membrane network. The research results would promote the study of SiO₂/PVA composite materials, and their application in the field of membrane separation.
- pervaporation,
- mixed matrix membrane,
- SiO₂,
- polyvinyl alcohol,
- sol-gel route
Long Abstrsct
Innovation Points

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References(31)

References

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