Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/2145
Título: Influence of the pre-treatments on the properties of biodegradable films from bovine hair
Autor: Costa, Joana F.
Pitrez, Patrícia R.
Rocha, Cristina M. R.
Freitas, Olga M.
Crispim, Alfredo
Delerue-Matos, Cristina
Gonçalves, Maria Pilar
Palavras-chave: Bovine hair
Keratin
Biofilm
Waste-products
Data: 2012
Editora: PSP - Parlar Scientific Publications
Relatório da Série N.º: Fresenius Environmental Bulletin; Vol. 21, Issue 8c
Resumo: The replacement of conventional synthetic films and coatings by biodegradable alternatives reduces the use of non-renewable resources and waste disposal problems. Considering that Portugal is a major producer of leather, and consequently a large producer of related wastes, in this research, bovine hair was tested for the production of biodegradable films directly by thermo-compression, allowing waste valorisation and reduction of environmental pollution. The aim of this study was to determine the influence of the different pre-treatments performed by two processes (removal by mechanical action and removal by chemical process), applied to bovine hair, in order to obtain a biodegradable film with appropriate properties. Mechanical properties for these films were evaluated, namely strain at break, stress at break and Young modulus. Additionally colour, solubility and swelling in water were also studied. The mechanical removal hair only produced films with Na2S treatment. Chemical removed hair (immunization) depends of the pre-treatment and the degreasing with petroleum ether or sodium sulphide pre-treatment leads better mechanical properties. The results obtained indicated that the pre-treatments have an important role in the final properties of biodegradable films.
Peer review: yes
URI: http://hdl.handle.net/10400.22/2145
ISSN: 1018-4619
Versão do Editor: http://www.psp-parlar.de/details_artikel.asp?tabelle=FEBArtikel&artikel_id=4189&jahr=2012
Aparece nas colecções:ISEP – GRAQ – Artigos

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