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Influence of containing moisture on hydrothermal stability of modified collagen thermal characteristics analysis by DSC

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Abstract

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 (T s) are determined by a special T s-testing-apparatus and denaturation temperatures (T d) are determined by the differential scanning calorimetry. The relations between the modified collagens containing moisture and their hydrothermal stability, T s or T d, were studied. The results show that the cross linking agents can enhance the thermal stability of modified collagen whose T s are 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 between T s and T d of collagen modified by chrome is more obvious than that of collagen modified with MI–OZ. And when the moisture of chrome leather exceeds 55%, T d cannot express thermal stability of modified collagen as a substitute for T s, and the moisture is 40% for leather tanned with MI–OZ.

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Acknowledgements

For financial support, the authors would like to thank the Research Fund for the Doctoral program of Higher Education (No. 20050610046) and National Science Foundation of China (No. 50573051). We would also like to thank those authors who provided preprints prior to publication.

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Authors and Affiliations

  1. National Engineering Laboratory for Clean Technology Leather Manufacture, Sichuan University, 610065, Chengdu, China

    Ya-juan Wang, Hui Chen & Zhi-hua Shan

  2. Department of Biomass and Leather Engineering, Sichuan University, 610064, Chengdu, China

    Jun Guo & Zhi-hua Shan

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  1. Ya-juan Wang
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  2. Jun Guo
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  3. Hui Chen
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  4. Zhi-hua Shan
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Correspondence to Zhi-hua Shan.

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Wang, Yj., Guo, J., Chen, H. et al. Influence of containing moisture on hydrothermal stability of modified collagen thermal characteristics analysis by DSC. J Therm Anal Calorim 99, 295–300 (2010). https://doi.org/10.1007/s10973-009-0561-y

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  • DOI: https://doi.org/10.1007/s10973-009-0561-y

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