期刊
CARBOHYDRATE POLYMERS
卷 134, 期 -, 页码 673-679出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.08.042
关键词
Hydrogel characterization; Cassia grandis; Vegetal polysaccharides; Rheology; NMR
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Fundacao de Amparo a Ciencia e Tecnologia do Estado de Pernambuco (FACEPE)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- CNPq
A new hydrogel based on two natural polysaccharides was prepared in aqueous medium with 1.7% (w/v) galactomannan (from Cassia grandis seeds) and different concentrations of kappa-carrageenan (0.3, 0.4 and 0.5% w/v), CaCl2 (0.0, 0.1 and 0.2 M) and pH (5.0, 5.5 and 6.0), using a full factorial design based on rheological parameters. The best formulation was obtained with 1.7% (w/v) galactomannan and 0.5% (w/v) K-carrageenan, containing 0.2 M CaCl2 at pH 5.0. Nuclear magnetic resonance and scanning electron microscopy where used in order to characterize the hydrogel formulation. A shelf life study was carried out with this formulation along 90 days-period of storage at 4 degrees C, evaluating pH, color, microbial contamination and rheology. This hydrogel showed no significant changes in pH, no microbial contamination and became more translucent along the aging. Analyses by nuclear magnetic resonance and rheology showed a larger organization of the polysaccharides in the hydrogel matrix. The results demonstrated that this hydrogel was stable with possible applications in medical and cosmetic fields. (C) 2015 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据