Antimicrobial and antioxidant linen via laccase-assisted grafting

• Autor(a) principal: Silva, Carla Manuela Pereira Marinho da
• Data de Publicação: 2011
• Outros Autores: Matamá, Maria Teresa, Padrão, Jorge, Kim, Suyeon, Prasetyo, E. N., Kudanga, T., Nyanhongo, Gibson S., Guebitz, G. M., Casal, Margarida, Paulo, Artur Cavaco
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/1822/14793
• topic: Chitosan; Catechin; Laccase; Polymerization; Linen; Science & Technology

A laccase from Ascomycetemyceliophthora thermophila was used to assist the binding of chitosan and catechin onto a previous enzymatically oxidized linen surface. The process consists of the pre-treatment of the linen with laccase followed by the application of chitosan in a first step and catechin plus laccase in a second step. The results presented here support the conclusion that laccase is able to oxidize phenols naturally existing in flax fibres, and that the o-quinones formed promote the attachment of chitosan or/and catechin. The pre-treatment of linen with laccase is therefore the key factor for the success of catechin and chitosan grafting. A multifunctional linen product with both antioxidant and antibacterial properties was obtained with an acceptable level of durability in terms of end user requirements.