摘要
4D打印形状记忆聚合物是在3D打印的基础上,物体形状可随时间改变的智能材料。利用聚酯丙烯酸酯改善丙烯酸酯基形状记忆聚合物的形状记忆性能,制备了聚酯丙烯酸酯/环氧丙烯酸酯形状记忆聚合物打印样品,系统地研究了预聚物比例以及稀释剂添加量对形状记忆性能和机械性能的影响。结果表明,聚酯丙烯酸酯/双酚A型环氧丙烯酸酯为1∶2时,拉伸强度最高达到30.5MPa,杨氏模量为286.38MPa。当预聚物比例为1∶2,稀释剂质量分数为50%(质量分数)时,在14次折叠水浴实验中,形状记忆聚合物的形状恢复率稳定保持在99.3%~99.8%;在85℃水浴温度中,4D打印样品4s就可以恢复到180°,具有良好的形状记忆性能。
Shape memory polymer with 4D printing is a smart material that can change the shape of an object over time based on 3D printing.In this work,polyester acrylates were exploited to improve the performance of shape memory based on acrylate,and printed samples with shape memory polymer of polyester acrytate/epoxy acrylate were prepared.The effects of prepolymer ratio and diluent amount on shape memory and mechanical properties were investigated systematically.The results demonstrated that when polyester acrytate/bisphenol A epoxy acrylate was 1∶2,the maximum tensile strength was 30.5 MPa and elastic modulus was 286.38 MPa.While the prepolymer ratio was 1∶2 and the diluent mass fraction was 50 wt%,the shape memory polymer maintained a stable shape recovery rate of 99.3%-99.8%under the 14-folding experiments of water bath.The 4D printed samples recovered to 180°in 4 s at 85℃water bath temperature,showing good performance of shape memory.
作者
张静
刘秀军
王瑞晨
王帅达
ZHANG Jing;LIU Xiujun;WANG Ruichen;WANG Shuaida(School of Chemistry and Chemical Engineering,Tiangong University,Tianjin 300387,China;State Key Laboratory of Hollow Fiber Membranes and Membrane Processes,Tiangong University,Tianjin 300387,China)
出处
《功能材料》
CAS
CSCD
北大核心
2022年第10期10157-10161,共5页
Journal of Functional Materials
基金
国家自然科学基金项目(21878232)。
