TY - JOUR
T1 - Positively charged nanofiltration membrane based on cross-linked polyvinyl chloride copolymer
AU - Fang, Li Feng
AU - Zhou, Ming Yong
AU - Cheng, Liang
AU - Zhu, Bao-Ku
AU - Matsuyama, Hideto
AU - Zhao, Shuaifei
PY - 2019/2/15
Y1 - 2019/2/15
N2 - A polyvinyl chloride (PVC)-based positively-charged nanofiltration membrane was fabricated from polyvinyl chloride-graft-poly(N,N-dimethylaminoethyl methacrylate) by heating and crosslinking treatment. We characterized the surface chemical compositions, membranes structures, surface hydrophilicity and surface charges of the prepared membrane. The estimated membrane pore diameter is 1.98 nm and the pore diameters are in the range of 0.5–2.0 nm. The membrane exhibits excellent water permeability (9.3 L m−2 h−1 bar−1) and salt rejection (93.1% with MgCl2 solution). Both the heating treatment and crosslinking reaction can diminish the pore size of the precursor membrane. The membrane hydrophilicity is improved after quaternization, leading to higher water permeability compared with the membrane treated by heating only. Moreover, surface quaternization and crosslinking offer the membrane excellent pressure resistance and long-term stability. The prepared nanofiltration membrane has great promise in many applications including water softening and multivalent ion removal.
AB - A polyvinyl chloride (PVC)-based positively-charged nanofiltration membrane was fabricated from polyvinyl chloride-graft-poly(N,N-dimethylaminoethyl methacrylate) by heating and crosslinking treatment. We characterized the surface chemical compositions, membranes structures, surface hydrophilicity and surface charges of the prepared membrane. The estimated membrane pore diameter is 1.98 nm and the pore diameters are in the range of 0.5–2.0 nm. The membrane exhibits excellent water permeability (9.3 L m−2 h−1 bar−1) and salt rejection (93.1% with MgCl2 solution). Both the heating treatment and crosslinking reaction can diminish the pore size of the precursor membrane. The membrane hydrophilicity is improved after quaternization, leading to higher water permeability compared with the membrane treated by heating only. Moreover, surface quaternization and crosslinking offer the membrane excellent pressure resistance and long-term stability. The prepared nanofiltration membrane has great promise in many applications including water softening and multivalent ion removal.
KW - Crosslinking
KW - Nanofiltration membrane
KW - Polyvinyl chloride
KW - Positively charged membrane
KW - Quaternization
UR - http://www.scopus.com/inward/record.url?scp=85056179196&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2018.10.054
DO - 10.1016/j.memsci.2018.10.054
M3 - Article
AN - SCOPUS:85056179196
SN - 0376-7388
VL - 572
SP - 28
EP - 37
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -