Polypropylene/chemically treated coir composites: optimizing coir delignification conditions using central composite design
dc.contributor.author | de Araujo Morandim-Giannetti A. | |
dc.contributor.author | Pasquoto C.G. | |
dc.contributor.author | Sombra T.M. | |
dc.contributor.author | Bonse B.C. | |
dc.contributor.author | Bettini S.H.P. | |
dc.date.accessioned | 2019-08-20T00:12:02Z | |
dc.date.available | 2019-08-20T00:12:02Z | |
dc.date.issued | 2018 | |
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.firstpage | 1159 | |
dc.description.issuenumber | 2 | |
dc.description.lastpage | 1170 | |
dc.description.volume | 25 | |
dc.identifier.citation | DE 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.doi | 10.1007/s10570-017-1617-y | |
dc.identifier.issn | 0969-0239 | |
dc.identifier.uri | https://repositorio.fei.edu.br/handle/FEI/1708 | |
dc.relation.ispartof | Cellulose | |
dc.rights | Acesso Restrito | |
dc.subject.otherlanguage | Alkaline treatment | |
dc.subject.otherlanguage | Composite properties | |
dc.subject.otherlanguage | Polypropylene/coir composite | |
dc.subject.otherlanguage | Two-factor central composite design | |
dc.title | Polypropylene/chemically treated coir composites: optimizing coir delignification conditions using central composite design | |
dc.type | Artigo | |
fei.scopus.citations | 4 | |
fei.scopus.eid | 2-s2.0-85038640609 | |
fei.scopus.subject | Alkaline treatment | |
fei.scopus.subject | Cellulose structures | |
fei.scopus.subject | Central composite designs | |
fei.scopus.subject | Composite properties | |
fei.scopus.subject | Composite stiffness | |
fei.scopus.subject | Desirability function | |
fei.scopus.subject | NaOH concentration | |
fei.scopus.subject | Two-factor central composite design | |
fei.scopus.updated | 2024-12-01 | |
fei.scopus.url | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85038640609&origin=inward |