THERMO-RESPONSIVE HYDROGEL OF POLI VINYL ALCOHOL (PVA) - CO- N- ISOPROPYL ACRYLAMIDE (NIPAAM) PREPARED BY – RADIATION AS A MATRIX PUMPING/ON-OFF SYSTEM
| Main Authors: | 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, Rahayu C, Rahayu C; Centre for the Apllication Technology of Isotopes and Radiation, National Nuclear Energy Agency, Jl. Cinere Ps. Jumat PO BOX 7002, JKSKL 12070, Indonesia |
|---|---|
| Format: | Article info application/pdf eJournal |
| Bahasa: | eng |
| Terbitan: |
Universitas Gadjah Mada
, 2010
|
| Online Access: |
http://pdm-mipa.ugm.ac.id/ojs/index.php/ijc/article/view/455 http://pdm-mipa.ugm.ac.id/ojs/index.php/ijc/article/view/455/472 |
Daftar Isi:
- 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. Keywords: Hydrogel, PVA, Nipaam, radiation, swelling,LCST.