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Benzoyl peroxide thermo-crosslinked poly(ethylene-co-vinyl acetate) foam with two-way shape memory effect
Materials Letters ( IF 3 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.matlet.2020.127343
Jin Hui , Hong Xia , Yaqin Fu , Yiping Qiu , Qing-Qing Ni

Abstract Two-way reversible shape memory polymer foams with porous three-dimensional structures were prepared using salt-leaching technology based on benzoyl peroxide (BPO) thermo-crosslinked poly(ethylene-co-vinyl acetate) (PEVA). Various pore sizes of PEVA/BPO porous foam were obtained using different NaCl particle sizes. The PEVA/BPO foams with various pore sizes exhibited reversible shape changes that allowed contraction during cooling and expansion during heating. The ideal two-way shape memory performance can be clearly observed in the large pore size sample PEVA/BPO-450. The morphology was characterized by scanning electron micron microscopy (SEM) and X-ray microcomputed tomography scanning (μCT) analysis. The compression behavior of PEVA/BPO foam was also investigated. These properties of two-way reversible shape memory PEVA/BPO foams could qualify their use as lightweight porous actuators in artificial intelligence and aerospace applications.

中文翻译:

具有双向形状记忆效应的过氧化苯甲酰热交联聚(乙烯-共-醋酸乙烯酯)泡沫

摘要 以过氧化苯甲酰(BPO)热交联聚(乙烯-共-醋酸乙烯酯)(PEVA)为基础,采用盐浸技术制备了具有多孔三维结构的双向可逆形状记忆聚合物泡沫。使用不同的 NaCl 粒度获得了不同孔径的 PEVA/BPO 多孔泡沫。具有各种孔径的 PEVA/BPO 泡沫表现出可逆的形状变化,允许在冷却过程中收缩和加热过程中膨胀。在大孔径样品 PEVA/BPO-450 中可以清楚地观察到理想的双向形状记忆性能。通过扫描电子显微镜 (SEM) 和 X 射线显微计算机断层扫描 (μCT) 分析表征形态。还研究了 PEVA/BPO 泡沫的压缩行为。
更新日期:2020-04-01
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