ie9b00370_si_001.pdf (1.47 MB)
Download fileUsing the Green Solvent Dimethyl Sulfoxide To Replace Traditional Solvents Partly and Fabricating PVC/PVC‑g‑PEGMA Blended Ultrafiltration Membranes with High Permeability and Rejection
journal contribution
posted on 2019-03-25, 00:00 authored by Wancen Xie, Tong Li, Chen Chen, Haibo Wu, Songmiao Liang, Haiqing Chang, Baicang Liu, Enrico Drioli, Qingyuan Wang, John C. CrittendenTraditional solvents are harmful
to human health and the environment.
Here, we use a green solvent, dimethyl sulfoxide (DMSO), to replace
traditional solvents partly as well as improve membrane performance.
The amphiphilic copolymer poly(vinyl chloride)-graft-poly(ethylene glycol) methyl ether methacrylate (PVC-g-PEGMA) is blended with PVC to improve the membrane performance.
PVC cannot dissolve in DMSO, so based on the Hansen solubility parameter
calculation, we investigated the mixture solvents of traditional solvents
and DMSO. We found that membranes fabricated by solvent 1-methyl-2-pyrrolidinone
(NMP)/N,N-dimethylacetamide (DMAc)/DMSO
= 4/3/3 had the highest pure water flux of 891.54 ± 64.41 L m–2 h–1 bar–1 and
the highest sodium alginate (SA) rejection of 94.7 ± 1.3%. Other
studies have rarely reported modified PVC membranes with such good
performance. This membrane was a successful attempt to use a green
solvent in membrane fabrication, meeting the challenges of sustainability
in chemical enterprises.