The influence of potassium hydroxide concentration and reaction time on the extraction cellulosic jute fibers

Kataoka, Lays Furtado de Medeiros Souza; Hidalgo Falla, Maria Del Pilar; Luz, Sandra Maria da

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Élément Dublin Core	Valeur	Langue
dc.contributor.author	Kataoka, Lays Furtado de Medeiros Souza	-
dc.contributor.author	Hidalgo Falla, Maria Del Pilar	-
dc.contributor.author	Luz, Sandra Maria da	-
dc.date.accessioned	2022-05-30T13:50:01Z	-
dc.date.available	2022-05-30T13:50:01Z	-
dc.date.issued	2021-06-08	-
dc.identifier.citation	KATAOKA, Lays Furtado de Medeiros Souza; HIDALGO FALLA, Maria Del Pilar; Luz, Sandra Maria da. The influence of potassium hydroxide concentration and reaction time on the extraction cellulosic jute fibers. Journal of Natural Fibers, 2021. DOI: https://doi.org/10.1080/15440478.2021.1934934.	pt_BR
dc.identifier.uri	https://repositorio.unb.br/handle/10482/43822	-
dc.language.iso	Inglês	pt_BR
dc.publisher	Taylor & Francis	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	The influence of potassium hydroxide concentration and reaction time on the extraction cellulosic jute fibers	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Alfa celulose	pt_BR
dc.subject.keyword	Holocelulose	pt_BR
dc.subject.keyword	Fibra de juta	pt_BR
dc.subject.keyword	Planejamento fatorial	pt_BR
dc.subject.keyword	Alcalinização	pt_BR
dc.subject.keyword	Propriedades térmicas	pt_BR
dc.identifier.doi	https://doi.org/10.1080/15440478.2021.1934934	pt_BR
dc.relation.publisherversion	https://www.tandfonline.com/doi/full/10.1080/15440478.2021.1934934	pt_BR
dc.description.abstract1	A common method used to obtain cellulosic fibers is alkalinization with NaOH. Depending on NaOH content, treatments remove significant quantities of lignin and hemicellulose as small molecules. In biorefineries, where the preservation of components is needed, KOH may prevent hemicellulose chain formation. Here, we studied the efficacy of obtaining cellulosic fibers from jute using KOH. Jute fibers are about 84.2% holocellulose, which corresponds to 59.5% alpha cellulose and 24.7% hemicellulose. To obtain high cellulosic fiber yields from jute, effects of pulping with different KOH concentrations and altering reaction times were studied using factorial planning (22). Afterward, in natura and treated fibers were characterized via Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG) and derivative thermogravimetry. Holocellulose sample components were obtained by removing lignin. Factors including concentration and reaction time individually significantly affected cellulose yield. Alpha cellulose was produced when higher levels of the factorial planning conditions were applied. Ideal parameters for cellulose extraction included the addition of 10% (w/v) KOH for 3 h. FTIR analysis was used to ensure that lignocellulosic components were removed by fiber treatment. TG showed that treated fibers were thermally stable at temperatures close to, or higher than, in natura fibers.	pt_BR
dc.identifier.orcid	https://orcid.org/ 0000-0003-1766-7509	pt_BR
dc.identifier.orcid	https://orcid.org/ 0000-0002-2223-0021	pt_BR
dc.description.unidade	Faculdade de Ciências e Tecnologias em Engenharia (FCTE) – Campus UnB Gama	-
Collection(s) :	Artigos publicados em periódicos e afins