Self-Healing Polyurethane Elastomers Based on a Disulfide Bond by Digital Light Processing 3D Printing,ACS Macro Letters

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Self-Healing Polyurethane Elastomers Based on a Disulfide Bond by Digital Light Processing 3D Printing
ACS Macro Letters ( IF 5.1 ) Pub Date : 2019-10-31 , DOI: 10.1021/acsmacrolett.9b00766
Xinpan Li _{1,

2} , Ran Yu ₁ , Yangyang He _{1,

2} , Ying Zhang ₁ , Xin Yang ₁ , Xiaojuan Zhao ₁ , Wei Huang _{1,

2}

Affiliation

A type of polyurethane elastomer with excellent self-healing ability has been fabricated through digital light processing 3D printing. First, a type of polyurethane acrylate containing disulfide bonds is synthesized and then compounded with reactive diluent and photoinitiators to get a photopolymer resin. Due to the good fluidity and high curing rate, the photopolymer resin can be applied in DLP 3D printing, and various 3D objects with complicated structures, high printing accuracy, and remarkable self-healing ability have been printed. The tensile strength and elongation at break of the polyurethane elastomer are 3.39 ± 0.09 MPa and 400.38 ± 14.26%, respectively, and the healing efficiency can get to 95% after healing at 80 °C for 12 h and can be healed for multiple times. With the ease of fabrication and excellent performance, the polyurethane elastomers from DLP 3D printing have great potential applications in flexible electronics, soft robotics, and sensors.

中文翻译：

数字光处理 3D 打印基于二硫键的自修复聚氨酯弹性体

通过数字光处理3D打印制造出一种具有优异自愈能力的聚氨酯弹性体。首先合成一种含有二硫键的聚氨酯丙烯酸酯，然后与反应性稀释剂和光引发剂复合得到光聚合物树脂。由于流动性好、固化速度快，光敏树脂可应用于DLP 3D打印，已打印出各种结构复杂、打印精度高、自愈能力显着的3D物体。聚氨酯弹性体的拉伸强度和断裂伸长率分别为3.39±0.09 MPa和400.38±14.26%，在80℃愈合12 h后愈合效率可达95%，可多次愈合。凭借易于制造和卓越的性能，

更新日期：2019-11-01

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