紫外-冷凝老化对碳纤维/环氧树脂复合材料性能的影响  

Effect of UV Condensation Aging on Properties of Carbon Fiber/Epoxy Resin Composites

作　　者：刘瑜[1] 盛德星 王辉[3] 王玲[3] 李茜 胡涛 李永 LIU Yu;SHENG Dexing;WANG Hui;WANG ling;LI Qian;HU Tao;LI Yong(China Ordnance Industry Standardization Research Institute,Beijing 100089 China;Fifth Institute of Electronics,Ministry of Industry and Information Technology,Guangzhou 511350 China;Chongqing Key Laboratory of Equipment Environmental Effects and Protection,Southwest Institute of Technology and Engineering,Chongqing 400039,China)

机构地区：[1]中国兵器工业标准化研究所,北京100089 [2]工业和信息化部电子第五研究所,广州511350 [3]西南技术工程研究所装备环境效应与防护重庆市重点实验室,重庆400039

出　　处：《装备环境工程》2025年第1期196-202,共7页Equipment Environmental Engineering

摘　　要：目的研究碳纤维/环氧树脂基复合材料在紫外光和冷凝环境条件下的老化特征及性能变化。方法采用紫外-冷凝交替的加速试验对3233/CF3011/52复合材料进行加速老化研究,借助力学试验机、扫描电镜(SEM)、DMA等技术手段,观测研究老化前后复合材料的力学性能、微观形貌、玻璃化转化温度等变化。结果随着老化时间的延长,3233/CF3011/52复合材料表面发黄,局部纤维裸露更加明显,弯曲强度呈下降趋势,且老化83 d后,弯曲强度下降约50%,基体树脂的纳米压痕深度有所增大。复合材料的储能模量下降了约1 GPa,内耗增大,玻璃化转变温度随老化时间呈先增大、后降低的趋势。结论3233/CF3011/52复合材料的弯曲强度随老化时间的延长而下降,并且断口形貌中纤维拔出痕迹更加明显,表明紫外-冷凝交替作用对复合材料的纤维/树脂界面产生了一定程度破坏。老化前期,紫外辐射能量使树脂基体继续交联,一定程度上提高了复合材料的玻璃化转变温度,而老化过程中水分子对树脂的增塑作用,以及光老化降解使得基体树脂硬度下降,材料的玻璃化转变温度降低。The work aims to study the aging characteristics and performance changes of carbon fiber/epoxy resin composites under ultraviolet light and condensation environmental conditions.The accelerated aging of 3233/CF3011/52 composites was studied by UV condensation alternating acceleration test.Techniques such as mechanical testing machines and SEM/DMA were applied to observe and study the changes in mechanical properties,microstructure,and glass transition temperature of composites before and after aging.As the aging time prolonged,the surface of 3233/CF3011/52 composites turned yellow,and local fiber exposure became more obvious.The bending strength showed a decreasing trend,and the bending strength after 83 days of aging decreased by about 50%.The nanoindentation depth of the matrix resin also increased;The storage modulus of composite materials decreased by about 1 GPa.The internal friction increased,and the glass transition temperature showed a trend of first increasing and then decreasing with aging time.The bending strength of 3233/CF3011/52 composites decrease with the prolongation of aging time,and the fiber pull-out marks in the fracture morphology are more obvious,indicating that the alternating action of UV condensation causes a certain degree of damage to the fiber/resin interface of the composite material;In the early stage of aging,UV radiation energy causes the resin matrix to continue cross-linking,which to some extent increases the glass transition temperature of the composite material.However,during the aging process,the plasticizing effect of water molecules on the resin and photo aging degradation lead to a decrease in the hardness of the matrix resin and a decrease in the glass transition temperature of the material.

关 键 词：复合材料 碳纤维 紫外-冷凝 老化特征 断口形貌 力学性能 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]