Influence of containing moisture on hydrothermal stability of modified collagen thermal characteristics analysis by DSC
Influence of containing moisture on hydrothermal stability of modified collagen thermal characteristics analysis by DSC
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DOI：
10.1007/s10973-009-0561-y
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发表时间：
2010
影响因子：
4.4
通讯作者：
Yajuan Wang;Jun Guo;Hui Chen;Z. Shan
中科院分区：
文献类型：
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作者：
Yajuan Wang;Jun Guo;Hui Chen;Z. Shan
研究了硫酸Chrome和含羞草恶唑烷交联的绵羊皮胶原蛋白的热稳定性。所有样品的收缩温度（Ts）由专用Ts测试装置测定，变性温度（Td）由差示扫描量热法测定。研究了含水改性胶原与其水热稳定性TsorTd的关系。结果表明，交联剂能提高改性胶原的热稳定性，Chrome和MI-OZ处理的改性胶原的Tg分别为109.8和110.6 °C。当Chrome革的含水量为25-71.9%时，水热稳定性随含水量的增加而降低;结果表明，Chrome改性的胶原的Ts-Td差异比MI-OZ改性的胶原大。当Chrome革的含水量超过55%时，Td不能代替Ts来表征改性胶原的热稳定性，而MI-OZ鞣制的皮革含水量为40%。
The thermal stability of sheepskin collagen cross-linked with chrome sulfate and mimosa (MI)–oxazolidine (OZ), respectively, had been researched in this experiment. All samples’ shrinkage temperatures (Ts) are determined by a specialTs-testing-apparatus and denaturation temperatures (Td) are determined by the differential scanning calorimetry. The relations between the modified collagens containing moisture and their hydrothermal stability,TsorTd, were studied. The results show that the cross linking agents can enhance the thermal stability of modified collagen whoseTsare 109.8 and 110.6 °C for collagen treated with chrome and MI–OZ, respectively. When the samples contain 25–71.9% moisture for chrome leather and 20–71.1% for leather treated with MI–OZ, the hydrothermal stability will decrease with the increase of moisture. It was found that the difference betweenTsandTdof collagen modified by chrome is more obvious than that of collagen modified with MI–OZ. And when the moisture of chrome leather exceeds 55%,Tdcannot express thermal stability of modified collagen as a substitute forTs, and the moisture is 40% for leather tanned with MI–OZ.