Polymeric biomaterial hydrogels. I. Behavior of some ionotropic cross-linked metal-alginate hydrogels especially copper-alginate membranes in some organic solvents and buffer solutions
Polymeric biomaterial hydrogels. I. Behavior of some ionotropic cross-linked metal-alginate hydrogels especially copper-alginate membranes in some organic solvents and buffer solutions作者机构：Chemistry Department Faculty of Applied Sciences Umm Al-Qura University Makkah KSA Chemistry Department Faculty of Science Assiut University Assiut Egypt Chemistry Department Faculty of Science Benha University Benha Egypt Chemistry Department Saifia College of Science and Education Bhopal India
出 版 物：《Advances in Bioscience and Biotechnology》 (生命科学与技术进展（英文）)
年 卷 期：2012年第3卷第7期
页 面：845-854页
主 题：Biomaterials Hydrogels Swelling Shrinking Metal-Alginates Biocatalysts
摘 要：The change in rheological and mechanical properties for some ionotropic cross-linked metal-alginate hydrogel complexes in particularly copper-alginate membranes in the presence of some organic solvents (benzene, toluene, xylene, carbon tetrachloride, ace-tone, chloroform, dichloroethane, isobutyl alcohol and ethyl alcohol) or buffer solutions (acetates, borates and universal buffers) have been investigated. The experimental results showed a remarkable tendency of the studied hydrogels for shrinking in polar solvents, whereas no influence was observed for the hydrogels in non-polar solvents. On the other hand, the gels were found to swell or shrink in the buffer solutions depending on the pH of the buffer used. The swelling extent for hydrogel spheres was found to decrease in the order Cu Ba ≈ Ca Zn Pb-alginates in universal buffers of pH = 5.33. The factors affected this behavior have been examined and discussed.
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