LDPE-based composites reinforced with surface modified cellulose fibres : 3D morphological and morphometrical analyses to understand the improved mechanical performance

Autor: Ferreira, Filipe Vargas, 1987, Lona, Liliane Maria Ferrareso, 1966
Přispěvatelé: UNIVERSIDADE ESTADUAL DE CAMPINAS
Rok vydání: 2019
Předmět:
Zdroj: Repositório da Produção Científica e Intelectual da Unicamp
Universidade Estadual de Campinas (UNICAMP)
instacron:UNICAMP
Popis: Agradecimentos: The authors acknowledge the financial support acquired from FAPESP (Grant 2016/09588-9; Ph.D. fellowship of F.V.F, Grant 2016/04514-7, J.S.B), CAPES and CNPq. The authors also gratefully acknowledge the collaboration of LNNano/CNPEM in all the analyses, especially X-ray microtomography, XPS and SEM, as well as the support received by the Brazilian Bioethanol Science and Technology Laboratory (CTBE/CNPEM), for the mechanical separation, pre-treatment and chemical composition of bagasse samples Abstract: In this study, we reported the use of X-ray microtomography (µCT) as a new analytical tool to investigate better the dispersion of natural filler in the polymer matrix. The pre-treated sugarcane bagasse (SCB), richer in cellulose, was first functionalised by hexamethyldisiloxane (HMDS) and then added (10, 20 and 30 wt% filler) to low-density polyethylene (LDPE) by melt mixing. The microstructure organization of the cellulose in the composites was studied using 3D and 2D µCT images, where it was possible to obtain an in-depth morphological and morphometric analysis. Thus, the synergistic effect of the filler on the mechanical properties of the polymer matrix as a function of surface chemistry was well clarified without the need of a large number of micrographs as is required to show the quality of dispersion using conventional imaging techniques. The characterisation method reported here is an easy, non-destructive and powerful way to characterise the cellulose fibres dispersion in LDPE-based composites and it can be applied to other fillers and polymer matrices FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ fechado
Databáze: OpenAIRE
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