洋麻纤维性能分散性及其复合材料界面结合性能
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摘要
为了深入研究洋麻纤维及其复合材料的力学和界面性能,以马来西亚种植的洋麻为原料,研究了洋麻纤维的直径分布范围及直径对纤维力学性能的影响,结果显示洋麻纤维的平均直径为83. 16μm,60%以上在60～90μm之间,断裂伸长率大部分集中在2%～4%,纤维直径与断裂强度为负相关,与断裂伸长率没有明显的关系。通过洋麻纤维强度的Weibull函数的线性拟合曲线,计算特征强度σ_0为353. 35 MPa,Weibull模量β为2. 86,相对较小,表明洋麻纤维力学性能的分散性较大。通过纤维断裂实验,从微观角度研究了洋麻纤维和不饱和聚酯树脂间的界面结合性能,得到的剪切强度为1. 49 MPa。
In order to study the mechanical and interfacial properties of kenaf fiber and its composite materials,the kenaf was taken from Malaysia as raw material. The diameter distribution range and the effect of diameter on mechanical properties of kenaf fibers were studied. The results show that the average diameter of kenaf fiber is 83. 16 μm, more than 60% of fiber diameter is between 60 μm and 90 μm, and the elongation at break is mostly concentrated at 2 ～ 4%. The fiber diameter is negatively correlated with the breaking strength,and has no obvious relationship with the elongation at break. Through the linear fitting curve of the Weibull function of kenaf fiber strength,calculating the characteristic intensity σ0 is 353. 35 MPa,and the Weibull modulus β is 2. 86,which is relatively small,indicating that the mechanical property of kenaf fiber is highly dispersed. The interfacial bonding properties between kenaf fiber and unsaturated polyester resin are studied from the microscopic point by fiber breakage test. The shear strength is 1. 49 MPa.
In order to study the mechanical and interfacial properties of kenaf fiber and its composite materials,the kenaf was taken from Malaysia as raw material. The diameter distribution range and the effect of diameter on mechanical properties of kenaf fibers were studied. The results show that the average diameter of kenaf fiber is 83. 16 μm, more than 60% of fiber diameter is between 60 μm and 90 μm, and the elongation at break is mostly concentrated at 2 ～ 4%. The fiber diameter is negatively correlated with the breaking strength,and has no obvious relationship with the elongation at break. Through the linear fitting curve of the Weibull function of kenaf fiber strength,calculating the characteristic intensity σ0 is 353. 35 MPa,and the Weibull modulus β is 2. 86,which is relatively small,indicating that the mechanical property of kenaf fiber is highly dispersed. The interfacial bonding properties between kenaf fiber and unsaturated polyester resin are studied from the microscopic point by fiber breakage test. The shear strength is 1. 49 MPa.
引文
[1]杨建霞.苎麻纤维增强复合材料力学性能及界面吸水失效机理研究[D].上海:东华大学,2017.
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[3]李岩,李倩.植物纤维增强复合材料力学高性能化与多功能化研究[J].固体力学学报,2017,38(3):215-243.
[4] FIDELIS M E A,PEREIRA T V C,GOMES O D F M,et al. The effect of fiber morphology on the tensile strength of natural fibers[J]. J Mater Res Technol,2013(2):149-157.
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[6]秦文贞,于俊荣,贺建强,等.纤维增强复合材料界面剪切强度及界面微观结构的表征[J].高分子通报,2013(2):14-22.
[7]翟彦恺.疲劳载荷下复合材料界面剩余强度演化规律[D].哈尔滨:哈尔滨工业大学,2016.
[8]竺露萍.苎麻/聚乳酸复合材料的制备、性能优化及热水老化研究[D].上海:东华大学,2016.
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[10] Standard test method for tensile properties of single textile fibers:ASTM D3822-2014[S]. www. astm. org.
[11] WATSON A S,SMITH R L. An examination of statistical theories for fibrous materials in the light of experimental data[J]. J Mater Sci,1985,20(9):3260-3270.
[12]任云慧,王洋,张博明.碳纳米管纤维/环氧树脂复合材料的界面剪切强度及微观结构[J].复合材料学报,2014,31(5):1206-1211.
[2]李津,王春红,贺文婷,等.洋麻纤维的表面改性及其在聚丙烯基复合材料中的应用[J].工程塑料应用,2014,42(2):6-10.
[3]李岩,李倩.植物纤维增强复合材料力学高性能化与多功能化研究[J].固体力学学报,2017,38(3):215-243.
[4] FIDELIS M E A,PEREIRA T V C,GOMES O D F M,et al. The effect of fiber morphology on the tensile strength of natural fibers[J]. J Mater Res Technol,2013(2):149-157.
[5]李学梅,王继辉,高国强,等.单纤维复合材料断裂实验表征界面研究[J].武汉理工大学学报,2005,27(4):9-12.
[6]秦文贞,于俊荣,贺建强,等.纤维增强复合材料界面剪切强度及界面微观结构的表征[J].高分子通报,2013(2):14-22.
[7]翟彦恺.疲劳载荷下复合材料界面剩余强度演化规律[D].哈尔滨:哈尔滨工业大学,2016.
[8]竺露萍.苎麻/聚乳酸复合材料的制备、性能优化及热水老化研究[D].上海:东华大学,2016.
[9]纺织原料细度试验方法(直径)显微镜投影仪法:SN/T2672—2010[S].北京:中国标准出版社,2011.
[10] Standard test method for tensile properties of single textile fibers:ASTM D3822-2014[S]. www. astm. org.
[11] WATSON A S,SMITH R L. An examination of statistical theories for fibrous materials in the light of experimental data[J]. J Mater Sci,1985,20(9):3260-3270.
[12]任云慧,王洋,张博明.碳纳米管纤维/环氧树脂复合材料的界面剪切强度及微观结构[J].复合材料学报,2014,31(5):1206-1211.