HIDRÓXISSAIS LAMELARES (Cu2+ ou Zn2+) COMO AGENTES DE REFORÇO EM FILMES FINOS DE ALGINATO

• Autor(a) principal: Passos, Elthon Ferreira
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações do UNICENTRO
• Texto Completo: http://tede.unicentro.br:8080/jspui/handle/jspui/1013
• topic: Biopolímeros; Reforço; HSL; Filmes; Corantes; Biopolymers; Reinforcement; HSL; Films; Dyes; CIENCIAS EXATAS E DA TERRA::QUIMICA

The environmental problems are growing up in the last decades because of the increase in solid waste generation around the world. This fact has alerted entities and researchers in several areas to the search for the development of new materials that provide alternatives to mitigate these impacts, use of polymeric matrices derived from renewable sources began to gain prominence in this scenario. Among them, the alginate has been studied and shows promise for the development of these new materials. Also, to improve the performance of these matrices, there is the possibility of incorporating reinforcing agents, such as plasticizers, which act to provide greater flexibility, and the layered compounds, which give to the polymer matrices better characteristics in mechanical, chemical, optical, among other properties. From this, in this study, alginate composites, containing glycerol and layered hydroxides salts (with and without dyes molecules intercalated in the structure) were synthesized as reinforcing agents. The materials were characterized by X-ray diffractometry, ultraviolet and mid-infrared spectroscopy, colorimetry, scanning electron microscopy, traction resistance test and cryogenic break. The analysis of the hydroxide salts has shown that the HSL's was obtained and the intercalation process are effective, especially the zinc hydroxynitrate and the dye Orange G. As for the composites, it can be said that, in general, there was interaction between the phases (load-matrix), with emphasis on the load contents set at 4%.