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| Effect of UV Condensation Aging on Properties of Carbon Fiber/Epoxy Resin Composites |
| Received:September 09, 2024 Revised:November 06, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2025.01.020 |
| KeyWord:composites carbon fibre UV condensation aging characteristics fracture morphology mechanical property |
| Author | Institution |
| LIU Yu |
China Ordnance Industry Standardization Research Institute, Beijing China |
| SHENG Dexing |
Fifth Institute of Electronics, Ministry of Industry and Information Technology, Guangzhou China |
| WANG Hui |
Chongqing Key Laboratory of Equipment Environmental Effects and Protection, Southwest Institute of Technology and Engineering, Chongqing , China |
| WANG ling |
Chongqing Key Laboratory of Equipment Environmental Effects and Protection, Southwest Institute of Technology and Engineering, Chongqing , China |
| LI Qian |
Chongqing Key Laboratory of Equipment Environmental Effects and Protection, Southwest Institute of Technology and Engineering, Chongqing , China |
| HU Tao |
Chongqing Key Laboratory of Equipment Environmental Effects and Protection, Southwest Institute of Technology and Engineering, Chongqing , China |
| LI Yong |
Chongqing Key Laboratory of Equipment Environmental Effects and Protection, Southwest Institute of Technology and Engineering, Chongqing , China |
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| Abstract: |
| 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. |
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