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首页> 外文期刊>Journal of natural fibers >Effect of Thermal Aging and Chemical Treatment on Tensile Properties of Coir Fiber
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Effect of Thermal Aging and Chemical Treatment on Tensile Properties of Coir Fiber

机译：热老化和化学处理对椰壳纤维拉伸性能的影响

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摘要

Effect of thermal aging and chemical treatment on the physical properties of coir fiber was investigated. Coir fibers were treated with sodium hydroxide and glutaraldehyde for 2 h. The influence of alkali and aldehyde treatment on tensile strength and elongation at break was studied in detail. Enhancement in tensile strength of coir fiber was observed up to five days of aging at 50 degrees C and further decreased. Thermal cross linking of cellulose present in the fiber may be the reason for the increase in tensile strength and thermal degradation due to the chain scission of cellulose reduced the tensile strength. Sodium-hydroxide-treated samples showed an increase in tensile strength and reduction in elongation at break. The removal of impurities such as waxy and fatty acid residues from the coir fiber by reacting with strong base solution improved the strength of fiber. Cross linking of cellulose with glutaraldehyde in the fiber reduced the elasticity and enhances the strength of the material. Scanning electron microscopy was employed to analyze the change in surface morphology upon chemical treatment. Improvement in the tensile strength suggests that NaOH and glutaraldehyde can be effectively used to modify coir fiber with excellent physical properties.
机译：研究了热老化和化学处理对椰壳纤维物理性能的影响。用氢氧化钠和戊二醛处理椰壳纤维2小时。详细研究了碱和醛处理对拉伸强度和断裂伸长率的影响。观察到在50摄氏度下老化5天后椰壳纤维的拉伸强度有所提高，并且进一步降低。存在于纤维中的纤维素的热交联可能是抗张强度增加和由于纤维素的断链而降低抗张强度的热降解的原因。氢氧化钠处理的样品显示出抗张强度的增加和断裂伸长率的降低。通过与强碱溶液反应，从椰壳纤维中除去诸如蜡质和脂肪酸残留物等杂质，可提高纤维的强度。纤维素与戊二醛在纤维中的交联降低了弹性并增强了材料的强度。扫描电子显微镜用于分析化学处理后表面形态的变化。拉伸强度的提高表明，NaOH和戊二醛可以有效地用于改性具有优异物理性能的椰壳纤维。

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