TITLE

Stimuli-responsive membranes through peroxidation radiation-induced grafting of 2-hydroxyethyl methacrylate (2-HEMA) onto isotactic polypropylene film (IPP)

AUTHOR(S)
Rattan, Sunita; Sehgal, Teena
PUB. DATE
July 2012
SOURCE
Journal of Radioanalytical & Nuclear Chemistry;Jul2012, Vol. 293 Issue 1, p107
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Stimuli-responsive membranes were prepared by peroxidation radiation-induced grafting of 2-hydroxyethyl methacrylate (2-HEMA) onto IPP. The radioactive isotope Co was used as the source of gamma radiation. A plausible mechanism of grafting has been proposed. Using this method, the degree of grafting and morphology could be controlled through the variation of reaction parameters such as total dose, inhibitor concentration, monomer concentration, reaction time, reaction temperature and solvents. Maximum percentage of grafting (210 %) was obtained at total radiation dose of 20 kGy. The graft copolymerization reaction was carried out for 3 h with 20 v/v% of the monomer (2-HEMA) in methanol at 85 °C using 0.06 wt% of FeCl as inhibitor. The chemical structures of grafted membranes were characterized by Fourier transform infrared spectroscopy (FTIR) which indicates that HEMA has been grafted onto IPP. The atomic force microscopy (AFM), scanning electron microscopy (SEM) techniques were used to assess the morphological characterization of the membranes, revealing the roughness of the surface. These membranes were investigated for their swelling behavior. pH-sensitivity and the dyeability of the grafted and ungrafted membranes have also been studied.
ACCESSION #
76447112

 

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