Study on the influence of reaction time on the structure and properties of the PVDF membrane modified through the method of atom transfer radical polymerization

2013 ◽  
Vol 54 (5) ◽  
pp. 1013-1018 ◽  
Author(s):  
Yiping Zhao ◽  
Haiyang Zhao ◽  
Kaipeng Zhou ◽  
Guifang Zhang ◽  
Li Chen ◽  
...  
Keyword(s):  
Reaction Time ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Atom Transfer ◽  
Structure And Properties ◽  
Pvdf Membrane

Antifouling PVDF membrane grafted with zwitterionic poly(lysine methacrylamide) brushes

RSC Advances ◽  
2016 ◽  
Vol 6 (66) ◽  
pp. 61434-61442 ◽  
Author(s):  
Dapeng Liu ◽  
Jing Zhu ◽  
Ming Qiu ◽  
Chunju He
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Membrane Surface ◽  
Covalent Binding ◽  
Atom Transfer ◽  
Pvdf Membrane

Antifouling PVDF membranes were fabricated through the covalent binding of lysine methacrylamide (LysAA) brushes on the membrane surface via mussel-inspired surface-initiated atom transfer radical polymerization (SI-ATRP).

GRAFTING POLY(N-ISOPROPYL ACRYLAMIDE) FROM POLY(VINYLIDENE FLUORIDE) MIROFILTRATION, MEMBRANES VIA DIRECT SURFACE-INITIATED, ATOM TRANSFER RADICAL POLYMERIZATION, AND TEMPERATURE SENSITIVITY

2009 ◽  
Vol 16 (01) ◽  
pp. 111-121 ◽  
Author(s):  
YIWANG CHEN ◽  
JICHUN XIAO ◽  
WEIHUA ZHOU ◽  
QILAN DENG ◽  
HUARONG NIE ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Vinylidene Fluoride ◽  
Contact Angles ◽  
Solution Temperature ◽  
Atom Transfer ◽  
Pvdf Membrane ◽  
Membrane Surfaces ◽  
Isopropyl Acrylamide ◽  
Poly Vinylidene Fluoride

Well-defined poly(N-isopropyl acrylamide) (PNIPAAm) brushes on commercial hydrophobic poly(vinylidene fluoride) (PVDF) microfiltration membrane surfaces were prepared, via direct atom transfer radical polymerization (ATRP) with the secondary fluorinated site of PVDF as initiator and water as solvent at 80°C. The effect of solvents on the ATRP was studied in detail. The water as reaction solvent was in favor of surface-initiated ATRP of N-isopropyl acrylamide (NIPAAm) from secondary fluoride of PVDF membranes. The chemical composition and structure of the modified PVDF membrane surfaces were determined by attenuated total reflectance (ATR) Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The surface and cross-section morphology of membranes were studied by scanning electron microscopy (SEM). The pore sizes of the pristine PVDF membrane and the PNIPAAm-grafted PVDF membranes were measured using micro-image analysis and process software. The introduction of the well-defined PNIPAAm on the PVDF membrane gave rise to hydrophilicity. Water contact angles of PVDF membranes reduced after the surface grafting of PNIPAAm. Water fluxes and protein solution permeation experiments revealed that the PNIPAAm-grafted PVDF membranes exhibited temperature-responsive permeability. The unique microstructure of PNIPAAm brushes facilitated hydrophilicity below the lower critical solution temperature.

Redox Responsive Behavior of Thiol/Disulfide-Functionalized Star Polymers Synthesized via Atom Transfer Radical Polymerization

2010 ◽  
Vol 43 (9) ◽  
pp. 4133-4139 ◽  
Author(s):  
Jun Kamada ◽  
Kaloian Koynov ◽  
Cathrin Corten ◽  
Azhar Juhari ◽  
Jeong Ae Yoon ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Star Polymers ◽  
Atom Transfer ◽  
Redox Responsive ◽  
Responsive Behavior
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