Sugarcane bagasse cellulose/HDPE composites obtained by extrusion
Sugarcane bagasse cellulose/HDPE composites obtained by extrusion
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DOI：
10.1016/j.compscitech.2008.10.006
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发表时间：
2009-02
影响因子：
9.1
通讯作者：
D. Mulinari;H. Voorwald;M. Cioffi;Maria Emília Nadaletto Bonifácio da Silva;T. G. Cruz;C. Saron
中科院分区：
文献类型：
--
作者：
D. Mulinari;H. Voorwald;M. Cioffi;Maria Emília Nadaletto Bonifácio da Silva;T. G. Cruz;C. Saron
本研究中使用的天然纤维是来自甘蔗渣的预处理和改性的残余物。以高密度聚乙烯（HDPE）为基体，将纤维素（10%）和Cell/ZrO 2·nH 2 O（10%）共混，采用挤出机和液压机制备了复合材料。拉伸试验表明，Cell/ZrO 2·nH 2 O（10%）/HDPE复合材料的拉伸强度优于纤维素（10%）/HDPE复合材料。在纤维素（10%）/HDPE复合材料中，纤维素附聚是导致纤维与基体之间粘附力差的主要原因。HDPE/天然纤维复合材料也表现出较低的拉伸强度相比，聚合物。杨氏模量的增加与纤维增强有关。SEM分析表明，纤维素纤维插入基体中导致缺陷增加，而改性纤维素纤维的加入减少了缺陷的产生。
Natural fibers used in this study were both pre-treated and modified residues from sugarcane bagasse. Polymer of high density polyethylene (HDPE) was employed as matrix in to composites, which were produced by mixing high density polyethylene with cellulose (10%) and Cell/ZrO2·nH2O (10%), using an extruder and hydraulic press. Tensile tests showed that the Cell/ZrO2·nH2O (10%)/HDPE composites present better tensile strength than cellulose (10%)/HDPE composites. Cellulose agglomerations were responsible for poor adhesion between fiber and matrix in cellulose (10%)/HDPE composites. HDPE/natural fibers composites showed also lower tensile strength in comparison to the polymer. The increase in Young’s modulus is associated to fibers reinforcement. SEM analysis showed that the cellulose fibers insertion in the matrix caused an increase of defects, which were reduced when modified cellulose fibers were used.