[article]
| Titre : |
Enzymatic modification of hydrolysis products from collagen using a microbial transglutaminase. III. Preparation of films with improved mechanical properties |
| Type de document : |
texte imprimé |
| Auteurs : |
Maryann M. Taylor, Auteur ; Eleanor M. Brown, Auteur ; William N. Marmer, Auteur ; Cheng-Kung Liu, Auteur |
| Année de publication : |
2003 |
| Article en page(s) : |
p. 435-444 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Previous work from this laboratory demonstrated that films prepared from gelatins that had been enzymatically modified with microbial transglutaminase had improved tensile strength and toughness, were less soluble in water than gelatin alone and had improved hydrophilic properties. In the present study, our goal was to further enhance functional properties of the enzymatically prepared films and at the same time determine if biodegradability is retained. Orienting films has been described as a method to improve mechanical properties. We found that tensile strength, maximum strain, and Young's Modulus improved significantly when orientation took place on either unmodified or crosslinked dry gelatin films or on films that were swollen in water and then were subsequently dried in the strained position. We further demonstrated that the temperature of drying affects mechanical properties; drying at ambient temperature gives products with significantly higher tensile strength and reduced maximum strain over those products that had been dried at a higher temperature. Furthermore, we found that mechanical properties of strained and unstrained films, dried at ambient temperature, will give similar tensile strengths, thus indicating the importance of careful drying in film preparation. Finally, when polyvinyl alcohol was added to the gelatin mixture, films with improved tensile strength and maximum strain were obtained. In all studies, not only was biodegradability demonstrated but it was also found that by enzymatically modifying the gelatin, the resulting products were superior. |
| En ligne : |
https://drive.google.com/file/d/1M2Qt5WzslSGYHiiFn-Ct8QNDW0aCzLgs/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4166 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVIII, N° 11 (11/2003) . - p. 435-444
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Enzymatic modification of hydrolysis products from collagen using a microbial transglutaminase. III. Preparation of films with improved mechanical properties in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 11 (11/2003)
