木质素
形状记忆聚合物
聚合物
兴奋剂
材料科学
化学工程
复合材料
化学
有机化学
工程类
光电子学
作者
Bei Liu,X. Gu,Xi Chen,Yawen Yang,Jiaqi Zhang,Haibin Yin,Yu Cai
摘要
Abstract In this paper, the influence of different material trademarks, mass ratios, the melt mass‐flow rate ( MMFR ) and molecular weights ( MW ), mold and injection temperatures, Al 2 O 3 powder and lignin on the shape memory properties of PLA / PCL SMP material ( PPSM ) were then analyzed in detail by different characteristic methods. Besides, three promising applications (Origami metamaterials and variable‐stiffness grippers) are provided utilizing the PPSM doped with Al 2 O 3 /lignin. Eventually, a compensating strategy was discussed to improve the final configuration of the SMP after multi‐cycles. The shape memory recovery ratios could be improved by increasing the MMFR of PLA and the MW of PCL . The addition of 2 g‐Al 2 O 3 could shorten the recovery time, while the addition of 2 g‐lignin could increase the thermal‐recovery force and mechanical performance. The shape memory rate under 20 g weights, initial peak forces at room and high temperatures of the origami metamaterials could reach 57%, 2027. 29 N and 17. 49 N , respectively. The tensile force of banding rebars could reach 150. 29 N , which is promising to apply into the construction field.
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