摘要
以环氧树脂E51为基础材料,碳纤维为增强材料,制备出了不同碳纤维掺杂量(0,3%,6%,9%(质量分数))的改性环氧树脂基复合材料,研究了碳纤维掺杂量对环氧树脂基复合材料力学性能、微观形貌、热稳定性和导热性能的影响。结果表明,适量碳纤维的掺杂提高了环氧树脂基复合材料的力学性能、热稳定性和导热性能。随着碳纤维掺杂量的增加,改性环氧树脂基复合材料的拉伸强度、断裂延伸率、弯曲强度和弯曲模量均先增大后降低,当碳纤维的掺杂量为6%时,复合材料的拉伸强度、断裂延伸率、弯曲强度和弯曲模量均达到了最大值,分别为48.5 MPa,1.86%,85.6 MPa和3.09 GPa。随着碳纤维掺杂量的增加,复合材料的分解温度和残留量先升高后降低,当碳纤维的掺杂量为6%时,复合材料的分解温度和残留量达到最大,分别为453.7℃和4.9%。复合材料的导热系数随碳纤维掺杂量的增加而增大,当碳纤维的掺杂量<6%时,导热系数增长速率较快。综合分析可知,碳纤维的最佳掺杂量为6%。
Modified epoxy resin matrix composites with different carbon fiber doping amounts(0,3 wt%,6 wt%,9 wt%)were prepared with epoxy resin E51 as the base material and carbon fiber as the reinforcing material.The effects of carbon fiber doping on the mechanical properties,micro morphology,thermal stability and thermal conductivity of epoxy resin matrix composites were studied.The results showed that the appropriate amount of carbon fiber doping improved the mechanical properties,thermal stability and thermal conductivity of epoxy resin matrix composites.With the increase of carbon fiber doping,the tensile strength,elongation at break,flexural strength and flexural modulus of the modified epoxy resin matrix composites first increased and then decreased.When the doping amount of carbon fiber was 6 wt%,the tensile strength,elongation at break,flexural strength and flexural modulus of the composites reached the maximum,which were 48.5 MPa,1.86%,85.6 MPa and 3.09 GPa respectively.With the increase of carbon fiber doping,the decomposition temperature and residue of the composites first increased and then decreased.When the doping content of carbon fiber was 6 wt%,the decomposition temperature and residue of the composite reached the maximum,which were 453.7℃and 4.9%respectively.The thermal conductivity of the composites increased with the increase of carbon fiber doping,and when the doping amount of carbon fiber was less than 6 wt%,the growth rate of thermal conductivity was faster.Comprehensive analysis showed that the optimum doping amount of carbon fiber was 6 wt%.
作者
郑天麒
ZHENG Tianqi(School of Chemistry and Chemical Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)
出处
《功能材料》
CAS
CSCD
北大核心
2022年第12期12147-12151,共5页
Journal of Functional Materials
基金
国家自然科学基金项目(21575111)。
关键词
碳纤维
环氧树脂
力学性能
热稳定性
导热性能
carbon fiber
epoxy resin
mechanical properties
thermal stability
thermal conductivity
