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蔗渣纤维表面处理方法对蔗渣纤维/聚乳酸复合材料力学性能的影响

, PP. 60-65

Keywords: 聚乳酸,蔗渣纤维,表面处理,界面相容性,力学性能

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Abstract:

采用了硅烷偶联剂结合碱溶液处理的方法对蔗渣纤维(BF)进行了表面改性,研究了不同表面处理方法对蔗渣纤维/聚乳酸(PLA)复合材料力学性能的影响,用SEM对BF处理前后的形貌及复合材料的冲击断面进行了观察。结果表明:经表面改性的BF都不同程度地改善了BF与PLA基体之间的界面相容性,其中碱处理后再经偶联剂处理的方法效果最佳,在40%(质量分数)蔗渣纤维的高填充量下,复合材料的拉伸强度和冲击强度分别为纯PLA的85.42%和59.74%,较好地保持了基体PLA的力学强度;碱处理使BF表面变粗糙、长径比增大、比表面积增加,与PLA的界面粘结加强,从而有效地提高了BF/PLA复合材料的力学性能。

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