Effect of chemical treatments on properties of green coconut fiber
Effect of chemical treatments on properties of green coconut fiber
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DOI：
10.1016/j.carbpol.2009.10.005
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发表时间：
2010-03-17
影响因子：
11.2
通讯作者：
Coelho, M. A. Z.
中科院分区：
文献类型：
--
作者：
Brigida, A. I. S.;Calado, V. M. A.;Coelho, M. A. Z.
绿色椰子纤维。采用NaOCl、NaOCl/NaOH和H2O2三种方法对原产巴西东北海岸的木质纤维素材料进行化学处理。采用扫描电镜（SEM）、红外光谱（FTIR）、XPS、热重分析（TGA）等分析方法研究了这些处理对纤维结构、组成和性能的影响。扫描电镜显示，H2O2处理在去除蜡质和脂肪酸残留物方面是最有效的，但它没有改变表面化学成分，这可以从FTIR和润湿性结果中看出。化学成分和红外光谱分析显示，经NaOCl/NaOH处理的纤维中半纤维素含量降低，因此，这种纤维显示出更多的纤维素暴露和热稳定性降低。用NaOCl处理过的纤维表面在形态上与天然纤维表面相似，表面有Cl元素，它比天然纤维更亲水。2009爱思唯尔有限公司版权所有。
Green coconut fiber. a lignocellulosic material native from Brazilian northeast coast, was chemically treated by three methods: NaOCl, NaOCl/NaOH or H2O2. 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 H2O2 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. (C) 2009 Elsevier Ltd. All rights reserved.