Healing-on-demand composites based on polymer artificial muscle
Healing-on-demand composites based on polymer artificial muscle
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DOI：
10.1016/j.polymer.2015.03.022
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发表时间：
2015-05
期刊：
影响因子：
4.6
通讯作者：
Pengfei Zhang;Guoqiang Li
中科院分区：
文献类型：
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作者：
Pengfei Zhang;Guoqiang Li
在这项研究中，一种新的聚合物人工肌肉为基础的按需愈合复合材料的制备和表征。该复合材料由商业钓鱼线制成的聚合物人工肌肉、热固性主体和热塑性颗粒组成。梁试样的三点弯曲损伤即使在局部加热的约束边界条件下，也可以通过闭合后愈合的过程来愈合。用热风枪对断裂梁局部加热10 min。研究了自由边界条件和固定边界条件下的愈合效率。人工肌肉的快速收缩使断裂面在空间上接近;同时，熔融的热塑性剂通过毛细作用填充裂纹并将两个断裂面粘合。在预应变为60%（体积分数为8%）的情况下，自由边界条件下的修复效率超过60%，固定边界条件下的修复效率超过54%。聚合物人工肌肉具有成本低、愈合效率高、相容性好、柔韧性好等优点，有望成为下一代聚合物复合材料的新型医疗器械。
In this study, a new polymer artificial muscle based healing-on-demand composite was prepared and characterized. The composite consists of polymer artificial muscle made of commercial fishing line, thermoset host, and thermoplastic particle. Three-point bending damage to the beam sample can be healed even at a constrained boundary condition upon local heating, undergoing a close-then-heal procedure. The fractured beams were heated locally by a heat gun for 10 min. The healing efficiency was investigated at both free boundary condition and fixed boundary condition. The fast contraction of artificial muscle brings the fractured surfaces in spatial proximity; simultaneously, the melting thermoplastic agent fills the crack via capillary action and bonds the two fracture surfaces. With 60% prestrain of the reinforcing polymer artificial muscles (8% volume fraction), over 60% of healing efficiency was achieved at free boundary condition and 54% at fixed boundary condition after repeated damage-healing events. Due to its low cost, high healing efficiency, good compatibility, and excellent flexibility, we envision that the polymer artificial muscle will be a new device in designing next generation healing-on-demand polymer composite.