mz9b00766_si_001.pdf (1.84 MB)
Self-Healing Polyurethane Elastomers Based on a Disulfide Bond by Digital Light Processing 3D Printing
journal contribution
posted on 2019-10-30, 18:33 authored by Xinpan Li, Ran Yu, Yangyang He, Ying Zhang, Xin Yang, Xiaojuan Zhao, Wei HuangA 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.