Melt Processing of Unrefined Horn Keratin
2023
Jumeaux, M. | Touchaleaume, F. | Durrieu, Vanessa | Vandenbossche, V. | Vaca-Medina, G. | Rouilly, A. | Laboratoire de Chimie Agro-Industrielle (LCA) ; Ecole nationale supérieure des ingénieurs en arts chimiques et technologiques (ENSIACET) ; Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Ecole d'Ingénieurs de Purpan (INP - PURPAN) ; Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | ANR-22-LCV1-0001,SCLEROLAB,Laboratoire pour la valorisation des scléroprotéines dans le domaine des matériaux(2022)
International audience
Mostrar más [+] Menos [-]Inglés. The hierarchical structure of keratin makes it challenging to process without chemical modification. In this work, we show that using uniaxial thermocompression of unrefined horn powder, it is possible to “mold” the keratin macromolecules and process it like a convenience polymer, by maintaining a certain moisture content and applying high pressure. The processing window was delimited by the denaturation and thermal degradation temperatures of keratin. The optimization of processing parameters, such as moisture content, temperature, pressure, and holding time, was conducted with the aim of improving the mechanical properties of the resulting materials. Alternative thermocompression processes implementing different heating and cooling techniques were also tested and compared. The most important process parameter was the efficient cooling step to keep the material under pressure along the entire temperature cycle. The material obtained through this process exhibited remarkable strength, stiffness, water resistance, and thermal stability, making it a potential substitute for synthetic thermoplastic polymers and currently available biobased materials (i.e., poly(lactic acid), cellulose acetate). The study opens new avenues for further research on other sources of scleroproteins and process optimization, offering promising prospects for the development of biopolymer-based materials with superior properties.
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Este registro bibliográfico ha sido proporcionado por Institut national de la recherche agronomique