竹纤维碱化改性对竹纤维/聚丙烯复合材料性能的影响
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引用本文:黎晨欣,王爽,肖容慧,王利军,孔令学.竹纤维碱化改性对竹纤维/聚丙烯复合材料性能的影响[J].上海第二工业大学(中文版),2020,(4):279-285
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黎晨欣 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
王爽 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
肖容慧 1. 上海第二工业大学环境与材料工程学院, 上海201209
 
王利军 1. 上海第二工业大学环境与材料工程学院, 上海201209
3. 复旦大学聚合物分子工程国家重点实验室, 上海200433 
孔令学 2. 澳大利亚迪肯大学先进材料研究院, 3216
 
基金项目:上海第二工业大学研究生项目基金(EGD19YJ0084) 资助
中文摘要:用不同浓度的NaOH 溶液对竹纤维(bamboo fiber, BF) 进行表面改性处理, 一定温度烘干后, 通过熔融挤出 制备了竹纤维/聚丙烯(BF/PP) 竹塑复合材料。采用示差同步扫描热分析仪(TG-DSC)、红外光谱(FTIR)、X 射线衍 射仪(XRD) 和扫描电镜(SEM) 等对预处理前后BF 的结构进行表征, 并研究了复合材料的力学性能。结果表明: 改 性后BF 的热稳定性升高, 形成疏松的纤维束; 复合材料的力学性能显著提高。其中用3% 的NaOH 溶液改性BF 制 备的复合材料的力学性能最佳, 冲击强度较纯PP 可提高100%, 屈服强度提高14.8%。复合材料冲击断面SEM 显 示, 一定浓度的NaOH 溶液改性可以明显提高BF 与PP 基体树脂间的相容性。
中文关键词:竹纤维  碱化改性  竹纤维/聚丙烯复合材料  力学性能
 
The Effect of Bamboo Fiber Alkalization Modification on the Performanceof Bamboo Fiber/Polypropylene Composites
Abstract:Bamboo fiber (BF) was modified with different concentrations of NaOH solution, dried at a certain temperature, and then BF/polypropylene (BF/PP) bamboo-plastic composites were prepared by melt extrusion. Differential synchronous scanning thermal analyzer (TG-DSC), infrared spectroscopy (FTIR), X-ray diffractometer (XRD) and scanning electron microscope (SEM) were used to characterize the structure of BF during the modification and the mechanical properties of composite materials were studied . The results show that the thermal stability of the modified BF is increased and loose fiber bundles are formed; the mechanical properties of the composite materials are significantly improved. It is worth mentioning that the mechanical properties of composite materials prepared by modifying BF with 3% NaOH solution are the best. Compared with pure PP, the impact strength can be increased by 100%, and the yield strength is increased by 14.8%. The composite impact section SEM showed that a certain concentration of NaOH solution modification can efficiently promote the compatibility between BF and PP matrix resin.
keywords:bamboo fiber  alkalization modification  bamboo fiber/polypropylene composite  mechanical properties
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