| 摘要 |
The physical properties of aqueous gels comprising cellulose sulfate and one or more inorganic alkali metal salts are improved by the addition of one or more other water soluble polymers. The water soluble polymers are typically natural polysaccharides or cellulose derivatives other than cellulose sulfate. The gel can be obtained by dissolving the cellulose sulfate and water-soluble polymer components in water, adding an aqueous solution of the alkali metal salt to form a precipitate, redissolving the precipitate by heating, and then cooling the resulting solution. The thus obtained gel, in comparison with a corresponding composition containing no other water soluble polymer, has a higher gel strength and is a thermally reversible gel. The gel composition has various useful applications such as in the food, toiletry and medical arts, and as a slow-releasing carrier for perfumes or insecticides. |
