Influence of dispersion process on the characteristics of PVP-CLAY hydrogel
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2016
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BRAZILIAN CONFERENCE ON COMPOSITE MATERIALS, 3rd
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Resumo
Hydrogel is a hydrophilic material and can be used as wound dressing, since it can be
biocompatible, potencial drug delivery system and absorbent of fluids. Hydrogels can be produced by
one or more hydrophilic polymers; natural or synthetic. These materials have a three-dimensional
network of cross-linked polymer chains, and may be synthetized by gamma radiation that crosslinks and
sterilizes the hydrogel, in one step. PVP-clays composites show, through many ways of swellings tests,
an increase of fluid absorption properties. These properties can be modified when using a mechanical
or sonication dispersion process of clay in water, before polymer mixture preparation. The aim of the
present study is to prepare a hydrogel with PVP-clay containing poly (N-vinyl-2-pyrrolidone), poly
(ethylene glycol), Agar and Laponite clay processed by gamma radiation. The influence of clay
dispersion process, clay/polymer ratio in the hydrogel and type of sample (dried or not) were investigate
according to the methodology of gel fraction, swelling tests, Scanning electronic microscopy (SEM).
According to the results of water swelling, the clay sonication process is more effective than mechanical
dispersion, however, if the sample was dried in stove before the swelling test, the results were similar,
probable owing to morphology modification promoted by the stove drying process.
Como referenciar
SANTOS, VINICIUS J.; ZAFALON, ANGELICA T.; LUGAO, ADEMAR B.; PARRA, DUCLERC F. Influence of dispersion process on the characteristics of PVP-CLAY hydrogel. In: BRAZILIAN CONFERENCE ON COMPOSITE MATERIALS, 3rd, 28-31 de agosto, 2016, Gramado, RS. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/27352. 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.