Chemical modification effect on the mechanical properties of hips/ coconut fiber composites

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dc.contributor.authorCarvalho, Kelly C.C. [UNESP]
dc.contributor.authorMulinari, Daniella R. [UNESP]
dc.contributor.authorVoorwald, Herman J.C. [UNESP]
dc.contributor.authorCioffi, Maria O.H. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-28T21:24:23Z
dc.date.available2022-04-28T21:24:23Z
dc.date.issued2010-05-01
dc.description.abstractLignocellulosic fibers from green coconut fruit were treated with alkaline solution (NaOH 10%m/v) and then bleached with sodium chlorite (NaClO2) and acetic acid (CH3COOH). Alkali-treated and bleached fibers were mixed with high impact polystyrene (HIPS) and placed in an injector chamber in order to obtain specimens for tensile tests. Specimens of HIPS/alkali-treated and bleached coconut fiber composites were tested in tensile mode, and the fracture surfaces of the composites were analyzed by scanning electron microscopy. Untreated, alkali-treated, and bleached coconut fibers were analyzed by scanning electron microscopy and X-ray diffraction. Alkaline treatment was effective for removing the extractives and increasing the roughness of surfaces, while the bleaching treatment intensified the effect of alkaline treatment, while increasing the crystallinity index and surface energy of fibers. Results of tensile tests showed that the addition of 30% alkali-treated and bleached fibers reinforcing the HIPS matrix provided considerable changes in the mechanical properties of composites in comparison with the pure HIPS. On the other hand, chemical treatments were not totally effective for improving the adhesion between the fiber and matrix, as was observed in the analysis of the fracture surfaces of composites materials.en
dc.description.affiliationDepartment of Materials and Technology UNESP-Univ Estadual Paulista, Guaratinguetá/SP
dc.description.affiliationUnespDepartment of Materials and Technology UNESP-Univ Estadual Paulista, Guaratinguetá/SP
dc.format.extent1143-1155
dc.identifier.citationBioResources, v. 5, n. 2, p. 1143-1155, 2010.
dc.identifier.issn1930-2126
dc.identifier.scopus2-s2.0-77956070762
dc.identifier.urihttp://hdl.handle.net/11449/226018
dc.language.isoeng
dc.relation.ispartofBioResources
dc.sourceScopus
dc.subjectInjection moulding
dc.subjectLignocellulosic fiber
dc.subjectMechanical properties
dc.subjectPolymer-matrix composites
dc.titleChemical modification effect on the mechanical properties of hips/ coconut fiber compositesen
dc.typeArtigo

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