Interface control of bamboo fibers/polylactic acid composites
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摘要: 分别采用碱(NaOH)处理、 异氰酸酯(MDI)处理以及NaOH+MDI处理的界面调控方法对竹纤维/聚乳酸复合材料界面进行调控。结果表明, NaOH处理可以进一步细化竹纤维, 增加比表面积, 实现对竹纤维/聚乳酸复合材料界面的物理调控; MDI处理能够实现对复合材料界面的化学调控; 三种界面调控方法均可以改善竹纤维/聚乳酸复合材料的力学性能, 而NaOH+MDI界面调控效果最佳, 调控处理后复合材料拉伸强度和冲击强度分别增加了36.9%和36.5%。Abstract: The interface of the bamboo fibers/polylactic acid was controlled by alkali(NaOH) treatment, isocyanate (MDI) treatment and NaOH+MDI treatment, respectively. The results show that the NaOH treatment could further refine bamboo fibers and increase specific surface area, realizing the physical control of bamboo fibers/polylactic acid composites interface; MDI treatment could realize the chemical control of bamboo fibers/polylactic acid composites interface. All of the three kinds of the interface control methods could improve the mechanical properties of bamboo fibers/polylactic acid composites, among which NaOH+MDI treatment has the best positive effects on the interface properties of the composites, the tensile strength and impact strength of the bamboofibers/polylactic acid composites with interface control are increased 36.9% and 36.5%, respectively.
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Key words:
- bamboo fibers(BF) /
- polylactic acid /
- composites /
- interface control /
- mechanical properties
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