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ABSTRACT
Surface treatment of natural fibers with the help of chemicals has been proved to be an effective method for improving the properties of its associated composites. The present research investigates the effect of nonacidic and cost-effective chemical treatment using sodium acetate on the properties of kenaf mats reinforced Polylactic acid (PLA) composites. In particular, geometrically different kenaf fiber mats (unidirectional, bidirectional, and randomly oriented) were chemically treated with varying concentrations (10%, 15%, and 20% w/v) of sodium acetate, for three different time periods (24, 48, and 72 h) at room temperature. Effect of chemical treatment on the surface of kenaf fibers was examined by scanning electron microscopy. Mechanical characterization of the developed composites was done on the basis of tensile, flexural, and impact tests to investigate the effect of treatment on interfacial adhesion. The composites in which fibers were treated with a 20% concentration of sodium acetate at 48 hr of treatment time exhibited the highest tensile, flexural, and viscoelastic properties. Apart from impact strength, the effect of chemical treatment on the properties of green composites was found to be significant. Eco-friendly treatment of natural fibers using sodium acetate may offer huge potential for commercialization of green composites in furthermore applications.
摘要
对天然纤维进行化学表面处理是提高其复合材料性能的有效方法. 本研究旨在探讨非酸性且具成本效益之醋酸钠化学处理对红麻垫增强聚乳酸 (PLA) 复合材料性能之影响. 特别是, 在室温下, 用不同浓度 (10%, 15%和20%w/v) 的乙酸钠对不同几何结构的红麻纤维垫 (单向, 双向和随机取向) 进行了三个不同时间段 (24, 48和72小时) 的化学处理. 用扫描电镜观察了化学处理对红麻纤维表面的影响. 在拉伸, 弯曲和冲击试验的基础上对所制备的复合材料进行了力学性能表征, 以研究处理对界面结合力的影响. 纤维经20%浓度的乙酸钠处理48小时后, 复合材料表现出最高的拉伸, 弯曲和粘弹性性能. 除冲击强度外, 化学处理对绿色复合材料的性能也有显著影响. 利用醋酸钠对天然纤维进行环保处理, 为绿色复合材料的商业化应用提供了巨大的潜力.
关键词: 红麻纤维, 醋酸钠, 傅里叶变换红外光谱法, 绿色复合材料. 治疗参数