Formation of chitosan-cashew gun hydrogel with UV radiation
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2008
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INTERNATIONAL SYMPOSIUM ON IONIZING RADIATION AND POLYMERS, 8th
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Resumo
Chitin, obtained from lobster, shrimp and crab shell waste, is the second most
abundant polysaccharide found in nature. In the 21st century, chitin and its derivative
(chitosan) face new opportunities to contribute functional materials and environmentally
friendly materials to meet the diverse needs of today’s society because of their nontoxic,
biodegradable, biocompatible, antibacterial, etc.
UV Radiation processed chitosan cashew gun hydrogels have been observed to be
suitable for producing transparent, flexible, mechanically strong, biocompatible, effective and
economical hydrogel. No additives were used and different formulations containing chitosan
and cashew gun selected from combinations also with agar, were used to make the hydrogels.
Chitosan formulations containing the cashew gun and agar show significantly different pregel viscosities behavior. Increasing the concentration of agar in the formulation, it converts
the sheet gel to paste gel useful for filling wound cavities. For characterization, the hydrogels
were dried until constant weight and analyzed by infrared spectra (IR), thermal analyses,
Scanning electron microscopy and UV absorption spectra The results indicate that pre
irradiation network structure of the formulation plays an important role in properties of the
irradiated gel dressing. Scanning electron micrographs show highly porous structure of the
gel. To observe swelling response of the chitosan/PEG hydrogels when exposed to different
pH conditions, the hydrogels were emerged until equilibrium in an aqueous medium of pH 2,
4, 7 and 9 at 25o
C. The hydrogels presented higher swelling content in acid medium.
The hydrogels will be observed to be useful in treating burns, non-healing ulcers of diabetes,
drug controlled deliver and other external wounds.
Como referenciar
RIBEIRO, T.G.D.; FELINTO, M.C.F.C.; LUGAO, A.B. Formation of chitosan-cashew gun hydrogel with UV radiation. In: INTERNATIONAL SYMPOSIUM ON IONIZING RADIATION AND POLYMERS, 8th, October 12-17, 2008, Angra dos Reis, RJ. Abstract... p. 62. Disponível em: http://repositorio.ipen.br/handle/123456789/19131. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.