Using atom transfer radical polymerization for the synthesis of grafted PVDF copolymers towards the synthesis of membranes

TY - JOUR

T1 - Using atom transfer radical polymerization for the synthesis of grafted PVDF copolymers towards the synthesis of membranes

AU - Sermili, Sarit

AU - Eisen, Moris S.

PY - 2012/4

Y1 - 2012/4

N2 - Graft copolymers of poly(vinylidene fluoride) (PVDF) with poly(3-sulfopropyl methacrylic acid) (PVDF-g-PSPMA), poly(styrene-4-sulfonic acid) (PVDF-g-PSSA), and poly(dimethylaminoethyl methacrylate) (PDVFg-PDMAEMA) were synthesized. The aforementioned grafted copolymers were prepared from the corresponding (PDVF-g-PSPMPS) poly(3-sulfopropyl methacrylate potassium) and (PVDF-g-PSSS) poly(styrene-4-sulfonate sodium) salts using PVDF as a macroinitiator for atom transfer radical polymerization (ATRP). The copolymers were casted into membranes by the phase inversion method in aqueous media. The effects of polymerization time, degree of conversion, chain transfer agent (CTA) additive, crosslink process, and various solvents were investigated. The products were characterized by 1H and 13C NMR spectroscopy, IR spectroscopy, differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). The maximum grafting incorporation was up to 26, 20 and 20 wt % for PSSA, PSPMA and PDMAEMA, respectively. The incorporation was reduced using a CTA additive. The most impressive feature of the graft copolymer membranes produced in this study are the improved water fluxes and polyethylene glycol (PEG) rejection properties when compared to the commercially available, pristine PVDF.

AB - Graft copolymers of poly(vinylidene fluoride) (PVDF) with poly(3-sulfopropyl methacrylic acid) (PVDF-g-PSPMA), poly(styrene-4-sulfonic acid) (PVDF-g-PSSA), and poly(dimethylaminoethyl methacrylate) (PDVFg-PDMAEMA) were synthesized. The aforementioned grafted copolymers were prepared from the corresponding (PDVF-g-PSPMPS) poly(3-sulfopropyl methacrylate potassium) and (PVDF-g-PSSS) poly(styrene-4-sulfonate sodium) salts using PVDF as a macroinitiator for atom transfer radical polymerization (ATRP). The copolymers were casted into membranes by the phase inversion method in aqueous media. The effects of polymerization time, degree of conversion, chain transfer agent (CTA) additive, crosslink process, and various solvents were investigated. The products were characterized by 1H and 13C NMR spectroscopy, IR spectroscopy, differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). The maximum grafting incorporation was up to 26, 20 and 20 wt % for PSSA, PSPMA and PDMAEMA, respectively. The incorporation was reduced using a CTA additive. The most impressive feature of the graft copolymer membranes produced in this study are the improved water fluxes and polyethylene glycol (PEG) rejection properties when compared to the commercially available, pristine PVDF.

KW - atom transfer radical polymerization

KW - chain transfer agents

KW - graft copolymers

KW - membranes

KW - phase inversion

UR - http://www.scopus.com/inward/record.url?scp=84860246967&partnerID=8YFLogxK

U2 - 10.1002/ijch.201100126

DO - 10.1002/ijch.201100126

M3 - 文章

AN - SCOPUS:84860246967

SN - 0021-2148

VL - 52

SP - 347

EP - 358

JO - Israel Journal of Chemistry

JF - Israel Journal of Chemistry

IS - 3-4

ER -