Polypropylene/chemically treated coir composites: optimizing coir delignification conditions using central composite design

Página do item simplificado
dc.contributor.authorde Araujo Morandim-Giannetti A.
dc.contributor.authorPasquoto C.G.
dc.contributor.authorSombra T.M.
dc.contributor.authorBonse B.C.
dc.contributor.authorBettini S.H.P.
dc.date.accessioned2019-08-20T00:12:02Z
dc.date.available2019-08-20T00:12:02Z
dc.date.issued2018
dc.description.abstract© 2017, Springer Science+Business Media B.V., part of Springer Nature.The effect of alkaline treatment of coir on polypropylene/coir composite properties was investigated, using a two-factor central composite design where NaOH concentration and reaction time were varied. Alkaline treatment favored delignification, and at certain conditions, increased composite stiffness without loss in tensile strength. Increase in cellulose concentration likely increases the number of free hydroxyls, which is less favorable to composite mechanical properties. Treatments with 2 and 9% NaOH for 5 h resulted in cellulose concentration of about 50 and 70%, respectively. Treatments with high concentrations and for long periods are disadvantageous to composite properties, resulting in lower tensile strength likely due to the increased number of free hydroxyls as well as to possible breaks in cellulose structure. A desirability function, used to optimize the delignification process, revealed the highest tensile modulus and strength (3.5 GPa and 31 MPa, respectively) could be obtained at 5.75% NaOH and reaction time of 3 h.
dc.description.firstpage1159
dc.description.issuenumber2
dc.description.lastpage1170
dc.description.volume25
dc.identifier.citationDE ARAÚJO MORANDIM-GIANNETTI, ANDREIA; PASQUOTO, CAIO GODOY; SOMBRA, THAIS MATOSO; BONSE, BALTUS CORNELIUS; BETTINI, SÍLVIA HELENA PRADO. Polypropylene/chemically treated coir composites: optimizing coir delignification conditions using central composite design. Cellulose, v. 25, p. 1159-1170, 2017.
dc.identifier.doi10.1007/s10570-017-1617-y
dc.identifier.issn0969-0239
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/1708
dc.relation.ispartofCellulose
dc.rightsAcesso Restrito
dc.subject.otherlanguageAlkaline treatment
dc.subject.otherlanguageComposite properties
dc.subject.otherlanguagePolypropylene/coir composite
dc.subject.otherlanguageTwo-factor central composite design
dc.titlePolypropylene/chemically treated coir composites: optimizing coir delignification conditions using central composite design
dc.typeArtigo
fei.scopus.citations4
fei.scopus.eid2-s2.0-85038640609
fei.scopus.subjectAlkaline treatment
fei.scopus.subjectCellulose structures
fei.scopus.subjectCentral composite designs
fei.scopus.subjectComposite properties
fei.scopus.subjectComposite stiffness
fei.scopus.subjectDesirability function
fei.scopus.subjectNaOH concentration
fei.scopus.subjectTwo-factor central composite design
fei.scopus.updated2024-09-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85038640609&origin=inward
Arquivos
Coleções
Artigos