Please use this identifier to cite or link to this item:
|Title:||Multi-functionalization of poly(vinylidene fluoride) membranes via combined "grafting from" and "grafting to" approaches|
|Citation:||Cai, T., Wang, R., Yang, W.J., Lu, S., Neoh, K.-G., Kang, E.-T. (2011-11-07). Multi-functionalization of poly(vinylidene fluoride) membranes via combined "grafting from" and "grafting to" approaches. Soft Matter 7 (23) : 11133-11143. ScholarBank@NUS Repository. https://doi.org/10.1039/c1sm06039b|
|Abstract:||PVDF-g-[PBIEM-co-PPMA] graft copolymers were first synthesized in a "grafting from" process, involving thermally induced graft copolymerization of two inimers, 2-(2-bromoisobutyryloxy)ethyl methacrylate (BIEM) and propargyl methacrylate (PMA), from ozone-preactivated poly(vinylidene fluoride) (PVDF) chains. Microporous membranes were fabricated from the PVDF-g-[PBIEM-co-PPMA] copolymers by phase inversion in an aqueous medium. The tertiary C-Br groups of BIEM repeat units and the propargyl groups of PMA repeat units on the PVDF-g-[PBIEM-co-PPMA] membrane and pore surfaces provided the respective functionalities for the "grafting from" process involving surface-initiated atom transfer radical polymerization (ATRP) of the viologen-containing monomer, N-benzyl-N′-(4-vinylbenzyl)-4,4′- bipyridium dichloride (BVbpy), and the "grafting to" process involving alkyne-azide click reaction with azido-terminated poly(N-isopropylacrylamide) (PNIPAM-N 3), prepared a priori via reversible addition-fragmentation chain transfer (RAFT) polymerization. The resulting PVDF-g-[P(BIEM-g-PBVbpy)-co- P(PMA-click-PNIPAM)] membrane exhibited both redox- and temperature-dependent permeability to aqueous solutions. Alternatively, metal ions, such as Ag, Au or Pt ions, can be immobilized and reduced within the viologen-containing PBVbpy brushes on the PVDF-g-[P(BIEM-g-PBVbpy)-co-PPMA] membrane. The functionalized PVDF-g-[P(BIEM-g-PBVbpy)-co-PPMA]-Ag membrane surfaces were shown to be effective in reducing bacterial adhesion and fouling under continuous-flow conditions. © The Royal Society of Chemistry 2011.|
|Source Title:||Soft Matter|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Sep 18, 2018
WEB OF SCIENCETM
checked on Sep 3, 2018
checked on Aug 24, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.