Produção de compósitos à base de Celulose bacteriana/Laponita organofuncionalizados com 3-aminopropiltrimetóxisilano visando aplicações médico farmacêuticas.

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Jhonatan Silva
Nayara Carolina Nunes
Vera Regina Leopoldo Constantino
Hernane da Silva Barud

Resumo

Em comparação com os curativos tradicionais, as membranas de celulose bacteriana (CB) apresentam características interessantes no tratamento de lesões cutâneas como: o alívio imediato da dor, a manutenção da umidade local, a ação como barreira física de proteção, e a adsorção de exsudatos durante a fase inflamatória; contudo, não possuem propriedade antibacteriana intrínseca. Já em sistema de liberação de fármacos, a CB apresenta um modelo de liberação rápida do princípio ativo (“burst release”) que possui efeitos negativos, podendo ser farmacologicamente perigosos. Desta forma, o objetivo do presente trabalho é a obtenção de compósitos à base de CB e a argila Laponita   organofuncionalizados com grupos amino para o desenvolvimento de um novo material que sirva como precursor de curativos multifuncionais com ação antibacteriana e sistema de liberação controlada de fármacos. A espectroscopia vibracional no infravermelho mostrou as bandas referentes aos grupos -NH2 e Si-O, da estrutura do silano e da argila, respectivamente, indicando assim a presença desses componentes na amostra. Além disso, a modificação da celulose ocasionou mudanças estruturais das regiões cristalinas da CB. Observou-se a presença de grânulos superficiais nas fibras, a redução da estabilidade térmica e uma mudança na permeação ao vapor de água, comparados com a CB prístina, indicando sucesso na modificação do polímero.

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Silva, J., Nunes, N. C. ., Constantino, V. R. L. ., & Barud, H. da S. (2024). Produção de compósitos à base de Celulose bacteriana/Laponita organofuncionalizados com 3-aminopropiltrimetóxisilano visando aplicações médico farmacêuticas. Revista Brasileira Multidisciplinar, 27(1), 45-56. https://doi.org/10.25061/2527-2675/ReBraM/2024.v27i1.2100
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