Thermal and rheological properties of gelatin-dextran hydrogels

被引：12
|
作者：
Bogdanov, B
Schacht, E
VanDenBulcke, A
机构：
[1] University of Ghent,Department of Organic Chemistry, Polymer Materials Research Group,Institute for Biomedical Technologies (IBITECH)
来源：
JOURNAL OF THERMAL ANALYSIS | 1997年 / 49卷 / 02期
关键词：
calorimetry; dextran; gelatin; hydrogels; rheology;
D O I：
10.1007/BF01996769
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Hydrogels prepared by crosslinkage of gelatin with dextran dialdehyde have been characterized by dynamic shear oscillation measurements at small strain. Isothermal as well as temperature scan measurements were performed. The results obtained demonstrated that the final polymer network is a result of a chemical gelatin-dextran dialdehyde interaction as well as a gelatin-gelatin (physical association) and a polymer-solvent interaction. This balance is strongly dependent on the composition of the system, the polymer concentration, the storage temperature and the storage time. We found that a short cryogenic treatment at -20 degrees C of physically structured gels, significantly increases the chemical crosslinkage. DSC measurements at low cooling rate confirm these results and demonstrate a chemical reaction enthalpy contribution.
引用
收藏
页码：847 / 856
页数：10
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