POLYMERS AND POLYMER MATRIX COMPOSITES |
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Light-energy Self-healing Composites Based on Wall-less Microvasculature |
LI Peng, DU Yibo, HUANG Peiwei, DING Ying, LIU Genzhu
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School of Mechatronics & Vehicle Engineering, East China Jiaotong University, Nanchang 330013, China |
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Abstract In the field of damage self-healing research, the wall-type carrier and the two-component repair system have the lack of poor mechanical compatibility and poor real-time self-healing. Based on the wall-less microvasculature, the research on the light-energy self-healing composite material is proposed in order to realize the real-time light-energy self-healing of composite material under the condition of ensuring the compatibility between the microvascular carrier and the mechanics of materials. Firstly, the diameter and number of microvasculature are optimized by using non-dominated sorting genetic algorithm Ⅱ (NSGA-Ⅱ) with the objective functions of tube density, water head loss and percentage of microvascular volume. Secondly, vacuum-assisted resin transfer molding process and mold loss method are used to develop wall-less microvasculature, and single-component short-wave photocuring binder is used as light-repairing agent to design self-healing composite material. Finally, the fatigue life is used to evaluate the mechanical compatibility and light repair properties of self-healing composites. The result shows that through the topological structure optimization and the design of wall-less carrier, the effect of microvascular embedding on the original properties of the material can be reduced (the average fatigue life decreased by 6.19%, and the average maximum static tension decreased by 4.48%), and it is helpful to improve the mechanical compatibility; light energy self-healing can not only ensure the ideal self-healing performance (average fatigue life increased by 37.86%), but also have good real-time performance, and it can quickly complete damage self-healing (repair time is less than 11.62 min).
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Published: 25 January 2022
Online: 2022-01-26
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Fund:National Natural Science Foundation of China (51365012,52165016). |
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