丝光和过氧化苯甲酰处理对剑麻纤维形态、热稳定性和结晶度的影响

V. Kaushik, Anilesh Kumar, S. Kalia
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引用次数: 98

摘要

在纤维增强复合材料中使用天然纤维代替人造纤维的研究已经增加,并开辟了进一步的工业可能性。天然纤维具有密度低、成本低、可生物降解等优点。然而,天然纤维在复合材料中的主要缺点是纤维与基体的相容性差,吸湿性相对较高。因此,化学处理是改善纤维表面性能的一种方法。采用不同浓度的碱和过氧化苯甲酰溶液对剑麻纤维进行了不同时间间隔的改性。采用扫描电镜(SEM)、热重分析(TGA)和x射线衍射(XRD)等技术研究了纤维的形态变化、热稳定性和结晶度。丝光处理降低了剑麻纤维的热稳定性。而经过氧化苯甲酰处理的剑麻纤维热稳定性增强。XRD分析表明,剑麻纤维结晶度增强。
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Effect of Mercerization and Benzoyl Peroxide Treatment on Morphology, Thermal Stability and Crystallinity of Sisal Fibers
Studies on the use of natural fibers as replacement to man-made fiber in fiber-reinforced co mposites have increased and opened up further industrial possibilities. Natural fibers have the advantages of low density, low cost, and biodegradability. However, the main d isadvantages of natural fibers in co mposites are the poor co mpatibility between fiber and matrix and the relative high mo isture sorption. Therefore, chemical treat ments are considered in modify ing the fiber surface properties. In this study, Sisal fibers were modified using alkali and benzoyl pero xide solution of different concentration for different time intervals. Morphological changes, thermal stability and crystallinity of fibers were investigated using scanning electron microscope (SEM), TGA and XRD technique. Thermal stability of sisal fibers were decreased on mercerization. Whereas, sisal fibers treated with benzoyl pero xide the enhanced thermal stability. In case of XRD studies, sisal fibers show enhanced crystallin ity.
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