Obtenção e caracterização de organogéis de óleo de soja estruturados com cera de cana-de-açúcar e suas frações solúveis em etanol à quente

Autores

DOI:

https://doi.org/10.33448/rsd-v9i6.3471

Palavras-chave:

Organogéis; Cera de cana; Morfologia de cristais; Reologia; Dureza.

Resumo

A cera de cana (SCW) foi fracionada usando etanol quente e um sistema de lavagem simples, as frações obtidas solúveis (SSCW) e insolúveis (ISCW) foram usadas para produzir organogéis cristalizados em duas temperaturas diferentes (5 e 25°C) nas concentrações de 1 , 2, 3 e 4% (m/m). A pesquisa avaliou o comparamento dos organogéis obtidos da cera de cana-de-açúcar (e suas frações), todos os organogéis foram avaliados quanto à sua microestrutura, comportamento térmico, comportamento reológico e resistência mecânica. Todas as amostras de organogel foram avaliadas quanto à estabilidade em uma estufa BOD com temperatura controlada (a 5, 25 e 35°C), e o comportamento térmico para os organogéis de SCW, SSCW e ISCW foi diferente. A variação de entalpia passou de 118,87 para 129,63 e 85,65J/g para as frações. Os organogéis obtidos a partir desses materiais foram algo semelhantes durante a cristalização (TPeak de 42,83, 37,19 e 36,23°C, respectivamente), a variação da cristalização e da entalpia de fusão apresentou histerese, como observado para outros organogéis de ceras. Os organogéis de SSCW foram significativamente mais difíceis do que os obtidos com SCW e ISCW. As micrografias dos organogéis mostraram uma rede mais organizada presente no organogel da SSCW quando comparada com a SCW que foi mais organizada que os organogéis da ISCW. A diferença na microestrutura observada explica a diferença no comportamento mecânico dos organogéis formados com frações solúveis e insolúveis em etanol quente da cera de cana de açúcar.

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11/04/2020

Como Citar

ROCHA, J. C. B.; BARRERA-ARELLANO, D. Obtenção e caracterização de organogéis de óleo de soja estruturados com cera de cana-de-açúcar e suas frações solúveis em etanol à quente. Research, Society and Development, [S. l.], v. 9, n. 6, p. e46963471, 2020. DOI: 10.33448/rsd-v9i6.3471. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/3471. Acesso em: 23 nov. 2024.

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Ciências Agrárias e Biológicas