Effect of urea processing on the thermal degradation kinetics of cattlehide collagen fibers

Keyong Tang, Xuejing Zheng, D. J. Casadonte, Hongbo Pan, D. C. Shelly

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Both the Horowitz-Metzger method and Coats-Redferm method were employed to get the thermal degradation activation energy (TDAE) of the samples. With the changes in thermal degradation activation energy of the samples processed with urea solutions being considered, the influence and mechanism of urea processing on the aggregation structure of collagen fibers were discussed. It was found that, with the increase in urea concentration, the thermal degradation activation energy first decreases and then increases. After being processed in urea solutions, the samples were washed with distilled water to remove the urea, and the thermal degradation behaviour of the samples was also studied. It was found that the thermal degradation activation energy recovers to its original level, indicating that the urea function on collagen fibers is temporary and reversible. The mechanism of urea processing involves the destruction of hydrogen bonds between collagen chains. Upon water washing, the urea was removed from the samples, and the collagen structure returned to their origin al state.

Original languageEnglish
Title of host publication32nd Congress of the International Union of Leather Technologists and Chemist Societies, IULTCS 2013
PublisherDeri Teknologlari, Teknisyenleri ve Kimyacilari Dernegi
ISBN (Electronic)9786056402302
StatePublished - 2013
Event32nd Congress of the International Union of Leather Technologists and Chemist Societies, IULTCS 2013 - Istanbul, Turkey
Duration: May 29 2013May 31 2013

Publication series

Name32nd Congress of the International Union of Leather Technologists and Chemist Societies, IULTCS 2013

Conference

Conference32nd Congress of the International Union of Leather Technologists and Chemist Societies, IULTCS 2013
CountryTurkey
CityIstanbul
Period05/29/1305/31/13

Keywords

  • Collagen fibers
  • Hydrogen bonds
  • Thermal degradation activation energy
  • Urea

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