过氧化苯甲酰热交联聚乙烯泡沫的双向形状记忆效应研究  

Study on the Two-way Shape Memory Effect of Benzoyl Peroxide Thermo-Crosslinked Poly(Ethylene-co-Vinyl Acetate)Foam

作　　者：许建宏[1] 汪婧[1] 周虹[1] XU Jian-hong;WANG Jing;ZHOU Hong(Jiangxi Vocational Technical College of Industry&Trade,Nanchang 330038,China)

机构地区：[1]江西工业贸易职业技术学院,江西南昌330038

出　　处：《塑料科技》2020年第4期24-27,共4页Plastics Science and Technology

摘　　要：采用基于过氧化苯甲酰(BPO)热交联乙烯-醋酸乙烯共聚物(PEVA)的盐浸化技术,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。通过使用不同尺寸的NaCl颗粒获得了多种孔径的PEVA/BPO多孔泡沫,其表现出可逆的形状变化,能够进行热胀冷缩,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内存性能。通过扫描电子显微镜(SEM)和X射线显微计算机断层扫描(μCT)对其进行形态特征分析并且研究了PEVA/BPO泡沫的压缩行为。分析表明,具有双向可逆形状记忆特性的PEVA/BPO泡沫塑料可以使其成为人工智能和航空航天应用中的轻质多孔执行器。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.

关 键 词：形状记忆泡沫 可逆性 热交联 孔径 多孔执行器 

分 类 号：TQ328[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]