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Effect of cyclic tests on the shape memory performance of GO-CF hybrid-reinforced SMPC
Polymer Composites ( IF 5.2 ) Pub Date : 2022-06-09 , DOI: 10.1002/pc.26786
Haiyin Guo 1 , Yuqin Ma 2 , Gangfeng Wang 2 , Wei Xu 1 , Tingting Zhao 3 , Fei Li 1 , Yi Xu 1
Affiliation  

This study investigated the effect of cyclic tests on the shape memory performance of graphene oxide-carbon fiber (GO-CF) hybrid-reinforced shape memory polymer composite (SMPC). The shape memory performance was evaluated by four indexes: shape fixation rate, shape recovery rate, recovery time, and maximum recovery force. The results showed that the service life of the GO-CF hybrid-reinforced SMPC prepared by the vacuum infiltration hot-press forming experimental system process (VIHPS) was 16 cycles. After 16 repetitions, the shape fixation rate decreased by approximately 6.6% and the shape recovery rate decreased by approximately 14.0%. At this time, the shape recovery rate was lower than 90%. The recovery time increased by 62.2% and the maximum recovery force decreased by 70.1%. The maximum recovery force exhibited the highest performance attenuation. Scanning electron microscopy (SEM) was used to photograph and analyze the microstructures of the samples under various cyclic tests. It was concluded that the main factor affecting the shape memory performance of GO-CF hybrid-reinforced SMPC is the life of fiber bundle. During cyclic testing, the fiber was prone to kinks, tensile damage and other defects, which increased the probability of reducing the length of the fiber bundle. Therefore, the probability of fiber fracture was improved, and the shape memory performance of the GO-CF hybrid-reinforced SMPC was attenuated.

中文翻译:

循环测试对 GO-CF 混合增强 SMPC 形状记忆性能的影响

本研究调查了循环测试对氧化石墨烯-碳纤维 (GO-CF) 混合增强形状记忆聚合物复合材料 (SMPC) 形状记忆性能的影响。形状记忆性能通过形状固定率、形状恢复率、恢复时间和最大恢复力四个指标进行评价。结果表明,采用真空浸渗热压成型实验系统工艺(VIHPS)制备的GO-CF混合增强SMPC的使用寿命为16个循环。16次重复后,形状固定率下降约6.6%,形状恢复率下降约14.0%。此时形状恢复率低于90%。恢复时间增加了62.2%,最大恢复力下降了70.1%。最大恢复力表现出最高的性能衰减。扫描电子显微镜(SEM)用于拍摄和分析样品在各种循环测试下的微观结构。得出结论,影响GO-CF混合增强SMPC形状记忆性能的主要因素是纤维束的寿命。在循环测试过程中,纤维容易出现扭结、拉伸损伤等缺陷,增加了纤维束长度缩短的概率。因此,提高了纤维断裂的概率,并削弱了 GO-CF 混合增强 SMPC 的形状记忆性能。得出结论,影响GO-CF混合增强SMPC形状记忆性能的主要因素是纤维束的寿命。在循环测试过程中,纤维容易出现扭结、拉伸损伤等缺陷,增加了纤维束长度缩短的概率。因此,提高了纤维断裂的概率,并削弱了 GO-CF 混合增强 SMPC 的形状记忆性能。得出结论,影响GO-CF混合增强SMPC形状记忆性能的主要因素是纤维束的寿命。在循环测试过程中,纤维容易出现扭结、拉伸损伤等缺陷,增加了纤维束长度缩短的概率。因此,提高了纤维断裂的概率,并削弱了 GO-CF 混合增强 SMPC 的形状记忆性能。
更新日期:2022-06-09
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