Solubility study of Kraft lignin for the development of electrospun nanofibers
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2022
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CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 24.
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Lignin is a high-volume byproduct of paper manufacturing which has been explored in many
research fields, especially for the development of fiber and nanofiber for biomedical applications
[1,2]. This work presents a solubility study performed through gravimetry for kraft lignin
considering its application for the development of electrospun nanofibers [3]. In practical terms,
lignin was solubilized in alkaline aqueous solution, dimethylformamide and dimethylsulfoxide, at
concentrations of 10, 15 and 20% (w/v) and varying temperatures of 25, 50 and 75 ºC, under
constant stirring. After solubilizing, the solution was filtered, and the insoluble fraction was dried in
the oven at 100 ºC. At 25 ºC lignin was insoluble in all solvents tested, as predicted using Hansen
solubility parameters. Although the increase in temperature promoted lignin solubilization in all
solvents tested, at the highest temperature assayed, the solubilization was facilitated, presenting
the smallest levels of the insoluble fraction. Lignin was soluble in all solvents tested, and optimum
solubility conditions were achieved using 10% lignin solutions (w/v), without significant insoluble
fraction, and therefore ideal concentration for the development of lignin based fibers.
Como referenciar
NOGUEIRA, K.M.; VARCA, J.O.; LIMA, C.S.; CRUZ, C.C. da; RIBEIRO, A.H.; FREITAS, L.F.; VARCA, G.H.; LUGAO, A.B. Solubility study of Kraft lignin for the development of electrospun nanofibers. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 24., 6-10 de novembro, 2022, Águas de Lindóia, SP. Resumo... Disponível em: http://repositorio.ipen.br/handle/123456789/33824. Acesso em: 27 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.