Effect of chemical treatments on properties of green coconut fiber

Green coconut fiber, a lignocellulosic material native from Brazilian northeast coast, was chemically treated by three methods: NaOCl, NaOCl/NaOH or H 2O 2. The effect of these treatments on the structure, composition and properties of fibers was studied using SEM, FTIR, XPS, TGA and other analyses....

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Bibliographic Details
Published in:Carbohydrate polymers 2010-03, Vol.79 (4), p.832-838
Main Authors: Brígida, A.I.S., Calado, V.M.A., Gonçalves, L.R.B., Coelho, M.A.Z.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical treatment
Exact sciences and technology
Fibers and threads
Forms of application and semi-finished materials
FTIR
Green coconut fiber
Polymer industry, paints, wood
SEM
Technology of polymers
Thermal analysis
Wettability
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Summary:Green coconut fiber, a lignocellulosic material native from Brazilian northeast coast, was chemically treated by three methods: NaOCl, NaOCl/NaOH or H 2O 2. The effect of these treatments on the structure, composition and properties of fibers was studied using SEM, FTIR, XPS, TGA and other analyses. SEM showed that treatment with H 2O 2 is the most efficient in terms of waxy and fatty acid residues removal but it does not modify the surface chemical composition, that it can be seen by FTIR and wettability results. The chemical composition and FTIR analyses revealed a reduction of the hemicelluloses content in the fibers treated with NaOCl/NaOH and, consequently, this fiber showed a greater exposure of cellulose and a reduction in thermal stability. The fiber surface treated with NaOCl is morphologically similar to the natural fiber surface, have the element Cl on your surface and it is a little more hydrophilic than the natural fiber.
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2009.10.005