Impact of acid type and glutaraldehyde crosslinking in the physicochemical and mechanical properties and biodegradability of chitosan flms

• Autor(a) principal: Pavoni, Julia Menegotto Frick
• Data de Publicação: 2021
• Outros Autores: Santos, Nicole Zagonel dos, May, Izabelly Cassia, Pollo, Liliane Damaris, Tessaro, Isabel Cristina
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/220447
• topic: Biopolímeros; Quitosana; Biodegradação; Biopolymer; Crosslinking; Biodegradable; Ecotoxicity; Packaging; Membranes

Biodegradable chitosan flms were produced using lactic and acetic acid solutions and glutaraldehyde as crosslinking agent by casting technique. The aim of this study was to evaluate the infuence of diferent acids and the crosslinking on the characteristics and biodegradability of chitosan flms. The flms were analyzed through thickness, swelling degree, mechanical and thermal properties, chemical structure and biodegradability. The glutaraldehyde release was also evaluated. All flms’ properties are deeply afected by the acid type and glutaraldehyde crosslinking. Crosslinking reduced the swelling degree of flms, also increasing their fragility. The glutaraldehyde release from the flms to the simulant solutions was not observed after the incubation period. Through biodegradation tests, it was observed that the crosslinking does not prevent flms’ degradability but longer time is required. The qualitative analysis of ecotoxicity of the flms suggests the possibility of composting the developed flms. The flms presented potential for application as membranes and in packaging, and diferent formulations can be used according to the desired fnal characteristics.