摘要
为研究碳纳米管(CNTs)界面改性对碳纤维/环氧复合材料(CF/EP)抗辐照性能的影响,采用电泳沉积法将CNTs引入到CF/EP界面区域(CF-CNTs/EP)中,然后分别对CF/EP和CF-CNTs/EP进行γ射线辐照处理(γ-CF/EP和γ-CF-CNTs/EP),并对复合材料的力学性能、热学性能、耐疲劳性能和官能团变化等特性进行分析。结果表明:由于CNTs的存在,γ-CF-CNTs/EP的储能模量、玻璃化转变温度、弯曲强度和弯曲模量分别比γ-CF/EP高7.8GPa、4.53℃、280MPa和19.2GPa;γ-CF-CNTs/EP的耐疲劳性能优于γ-CF/EP;XPS测试发现γ-CF-CNTs/EP内部C-C键的含量急剧减少10.88%,C-N键和C-O键的含量分别增加5.97%和4.44%,而γ-CF/EP无明显变化。结合断面形貌分析和裂纹扩展模型,讨论了CNTs增强复合材料抗γ射线辐射的微观结构和增强机制。以上结果证实,CNTs界面区域改性可以有效提升CF/EP的抗辐射性能。
In order to study the effect of carbon nanotubes (CNTs) on the anti-irradiation properties of carbon fiber/epoxy composites (CF/EP),CNTs were introduced into the CF/EP interface region (CF-CNTs/EP) by electrophoretic deposition. The composites were then subjected to γ ray irradiation (γ-CF/EP and γ-CF-CNTs/EP),and their properties such as mechanics,heat,fatigue resistance and functional group changes were analyzed. The results showed that the storage modulus,glass transition temperature,flexural strength and flexural modulus of γ-CF-CNTs/EP were higher than those of γ-CF/EP by 7.8 GPa,4.53 ℃,280 MPa and 19.2 GPa,respectively. The fatigue resistance of γ-CF-CNTs/EP was better than that of γ-CF/EP. The XPS test revealed no significant change in γ-CF/EP,while the internal C-C bond content of γ-CF-CNTs/EP decreased sharply by 10.88%,and C-N and C-O increased by 5.97% and 4.44%,respectively. Combined with scanning electron microscopy and crack propagation models,the microstructure and enhancement mechanisms of CNTs-reinforced composites for anti-gamma radiation are discussed. The above results confirm that the addition of CNTs into the interface region of CF/EP can effectively improve its radiation resistance.
作者
闫民杰
刘梁森
陈莉
刘丽研
荆妙蕾
徐志伟
姜亚明
傅宏俊
YAN Minjie;LIU Liangsen;CHEN Li;LIU Liyan;JING Miaolei;XU Zhiwei;JIANG Yaming;FU Hongjun(Key Laboratory of Advanced Braided Composites,Ministry of Education,School of Textiles,Tianjin Polytechnic University,Tianjin 300387)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2019年第24期4174-4180,共7页
Materials Reports
基金
国家自然科学基金(11575126
U1533123)
天津市自然科学基金(16JCYBJC17700)~~
关键词
复合材料
抗辐射
碳纳米管
界面改性
碳纤维
composite
radiation resistance
carbon nanotubes
interface modification
carbon fibers
