TY - JOUR
T1 - Effects of methacrylate based amphiphilic block copolymer additives on ultra filtration PVDF membrane formation
AU - Park, Sang Hee
AU - Ahn, Yeojin
AU - Jang, Munjeong
AU - Kim, Hyun Ji
AU - Cho, Kie Yong
AU - Hwang, Seung Sang
AU - Lee, Jung Hyun
AU - Baek, Kyung Youl
N1 - Funding Information:
This work was supported by the National Research Council of Science & Technology (NST) grant by the Korea government (MSIP) (No. CMP-16-04-KITECH) and partially supported by R&D Convergence Program of Ministry of Science, ICT and Future Planning, National Research Council of Science & Technology (No. CRC-14-1-KRICT).
Funding Information:
This work was supported by the National Research Council of Science & Technology (NST) grant by the Korea government (MSIP) (No. CMP-16-04-KITECH ) and partially supported by R&D Convergence Program of Ministry of Science, ICT and Future Planning, National Research Council of Science & Technology (No. CRC-14-1-KRICT ). Appendix A
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/8/31
Y1 - 2018/8/31
N2 - Well-defined methacrylate based amphiphilic block copolymers (BCs) consisting of poly(methyl methacrylate) (PMMA) and poly(ethylene glycol) methacrylate (PPEGMA) were synthesized by atom transfer radical polymerization (ATRP) and used as additives in DMAc casting solution to fabricate poly(vinylidene fluoride) (PVDF) ultra-filtration (UF) membranes in non-solvent induced phase separation (NIPS) process, where the amphiphilic BC additives hydrophilically altered PVDF with PPEGMA block segment by strong interaction with the other PMMA block segment, which reduced water resistance to the PVDF polymer solution during phase separation. FT-IR and XPS studies showed carbonyl groups of BCs in the PVDF membranes, which were not changed even after IPA treatment, indicating that BCs in the membrane were very stable. Obtained PVDF membranes with BCs showed porous surface layer and finger-like pore structures with macrovoids on the sublayers, of which sizes were increased with the increase of BC contents, which were then compared to the pristine PVDF membranes and the PVDF membrane with corresponding other additives such as hydrophobic PMMA, hydrophilic PPEGMA, LiCl and BC/LiCl. Obtained PVDF membranes showed MWCO with 100 K PEO and the best water flux (140 LMH) was achieved in the PVDF membrane with BC/LiCl additive, which was almost 4 times higher than the pristine PVDF membrane. In addition, the PVDF membranes with BC and BC/LiCl additives improved the anti-fouling property for BSA protein, of which reversible fouling resistance ratio was ca. 7 times higher than that of the pristine PVDF membrane.
AB - Well-defined methacrylate based amphiphilic block copolymers (BCs) consisting of poly(methyl methacrylate) (PMMA) and poly(ethylene glycol) methacrylate (PPEGMA) were synthesized by atom transfer radical polymerization (ATRP) and used as additives in DMAc casting solution to fabricate poly(vinylidene fluoride) (PVDF) ultra-filtration (UF) membranes in non-solvent induced phase separation (NIPS) process, where the amphiphilic BC additives hydrophilically altered PVDF with PPEGMA block segment by strong interaction with the other PMMA block segment, which reduced water resistance to the PVDF polymer solution during phase separation. FT-IR and XPS studies showed carbonyl groups of BCs in the PVDF membranes, which were not changed even after IPA treatment, indicating that BCs in the membrane were very stable. Obtained PVDF membranes with BCs showed porous surface layer and finger-like pore structures with macrovoids on the sublayers, of which sizes were increased with the increase of BC contents, which were then compared to the pristine PVDF membranes and the PVDF membrane with corresponding other additives such as hydrophobic PMMA, hydrophilic PPEGMA, LiCl and BC/LiCl. Obtained PVDF membranes showed MWCO with 100 K PEO and the best water flux (140 LMH) was achieved in the PVDF membrane with BC/LiCl additive, which was almost 4 times higher than the pristine PVDF membrane. In addition, the PVDF membranes with BC and BC/LiCl additives improved the anti-fouling property for BSA protein, of which reversible fouling resistance ratio was ca. 7 times higher than that of the pristine PVDF membrane.
KW - Amphiphilic block copolymer
KW - Lithium chloride
KW - Non-solvent induced phase separation
KW - Poly(vinylidene fluoride)
UR - http://www.scopus.com/inward/record.url?scp=85044158049&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2018.03.018
DO - 10.1016/j.seppur.2018.03.018
M3 - Article
AN - SCOPUS:85044158049
SN - 1383-5866
VL - 202
SP - 34
EP - 44
JO - Separation and Purification Technology
JF - Separation and Purification Technology
ER -