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Erizal Erizal
Centre for the Apllication Technology of Isotopes and Radiation, National Nuclear Energy Agency, Jl. Cinere Ps. Jumat PO BOX 7002, JKSKL 12070, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry

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THERMO-RESPONSIVE HYDROGEL OF POLI VINYL ALCOHOL (PVA) - CO- N- ISOPROPYL ACRYLAMIDE (NIPAAM) PREPARED BY –γ RADIATION AS A MATRIX PUMPING/ON-OFF SYSTEM Erizal Erizal; Rahayu C Rahayu C
Indonesian Journal of Chemistry Vol 9, No 1 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1370.246 KB) | DOI: 10.22146/ijc.21559

Abstract

Interpenetrating networks (IPN) crosslinked polymer of polyvinyl alcohol (PVA) containing copolymer N-isopropylacryalmide (NIPAAm) were fabricated by radiation technique and characterized in terms of their aqueous swelling and critical behaviour. The influence of irradiation dose (> 10 kGy) and PVA concentration (5-15%wt ) on the gel fraction and swelling properties were investigated. With an increase of -γ irradiation dosage, the gel fraction of hydrogels was inclined to increase but the swelling behaviour decreased markedly. The incorporation of PVA into NIPAAm by irradiation led a significant increase in swelling capability when comparing to the pure homopolymer (NIPAAm) hydrogels. In addition, the shrinking rate upon heating was significantly improved if the PVA content in poly(PVA-co-NIPAAm) hydrogels was less than 15% wt%. at temperature exceeding the collapsed transition point, all copolymer gels collapsed to a state of nearly complete dehydration. Based on its swelling-deswelling properties in the repeated application, the hydrogels are stable and showed a behaviour as matrix pumping system/on-off. The hydrogels would have potential applications in chemistry, pharmacy, and health care purposes.
Co-Authors Rahayu C Rahayu C