Preliminary studies on the thermal degradation kinetics of cattlehide collagen fibers / K. Tang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 10 (10/2004)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIX, N° 10 (10/2004) . - p. 401-408 Titre : Preliminary studies on the thermal degradation kinetics of cattlehide collagen fibers Type de document : texte imprimé Auteurs : K. Tang, Auteur ; Jinglong Liu, Auteur ; Jie Liu, Auteur ; F. Wang, Auteur Année de publication : 2004 Article en page(s) : p. 401-408 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, samples of un-tanned cattlehide collagen fibers, chrome tanned cattlehide collagen fibers, and glutaraldehyde tanned cattlehide collagen fibers are prepared and preliminary studies of their thermal degradation behavior completed. The methods of both Flynn-Wall-Ozawa and SatavaÅ esták, which have been being widely and successfully used in the study of thermal degradation kinetics of synthetic polymers, are used to process the data obtained from thermo-gravimetric analysis of the three samples at different heating rates. The results obtained indicate that the thermal degradation activation energy of un-tanned cattlehide collagen fibers is 130-160 kJ/mol. After tanning with chrome, it can reach 225-255 kJ/mol. However, in the case of a sample tanned with glutaraldehyde, its thermal degradation activation energy is only 120-163 kJ/mol, very close to the value of un-tanned cattlehide collagen fibers. The results suggest that the crosslink bonds between collagen molecules formed in the chrome tanning process are much more stable at high temperature than those formed in the glutaraldehyde tanning process. En ligne : https://drive.google.com/file/d/1hJZlVrBVTouywbe7a81hwME6IyYjqi6C/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4222 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001607	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Thermal degredation kinetics of sweat soaked cattlehide collagen fibers / K. Tang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CII, N° 2 (02/2007)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CII, N° 2 (02/2007) . - p. 52-61 Titre : Thermal degredation kinetics of sweat soaked cattlehide collagen fibers Type de document : texte imprimé Auteurs : K. Tang, Auteur ; F. Wang, Auteur ; P. Jia, Auteur ; J. Liu, Auteur ; Q. Wang, Auteur Année de publication : 2007 Article en page(s) : p. 52-61 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, samples of un-tanned cattlehide collagen fibers, chrome tanned cattlehide collagen fibers, and glutaraldehyde tanned cattlehide collagen fibers are prepared, and soaked in man-made sweat solutions. Studies of their thermal degradation behaviors are completed, and the factors affecting their thermal degradation behaviors are discussed. Both methods of Flynn-Wall-Ozawa and Å atava-Å esták are applied in the study of thermal degradation kinetics of these samples. The results indicate that, after being soaked in sweat for 15 days, the thermal degradation activation energies of all samples change in different degrees. Sweat-soaking process affects the thermal degradation activation energy of chrome tanned cattlehide collagen fibers the most obviously, and the chrome tanned sample is the worst in sweat resistance in the three samples studied here. The interaction between sweat and different modified cattlehide collagen fibers are discussed. En ligne : https://drive.google.com/file/d/1bpObz_5r3JdvlLhzb1IUOgykDW9QNA3A/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3368 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
006226	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)