Affiliation:
1. School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000, China
Abstract
In this work, a kind of side chain liquid crystalline poly(urethane-acrylate)s was synthesized by free polymerization based on self-made liquid crystalline monomers, and a series of liquid crystalline polyurethane/shape memory polyurethane composite membranes were prepared by electrospinning. The synthesized liquid crystalline poly(urethane-acrylate)s have excellent thermal stability. Due to the regular arrangement of azobenzene on the side chains, polymers can rapidly undergo a photoinduced transition from trans-isomerism to cis-isomerism in THF solution and restore reversible configurational changes under visible light. The composite membranes prepared by electrospinning can also undergo photoinduced deformation within 6 s, and the deformation slowly returns under visible light. Meanwhile, the composites have shape memory, and after deformation caused by stretching, the membranes can quickly recover their original shape under thermal stimulation. These results indicate that the composites have triple response performances of photoinduced deformation, photo-, and thermal recovery.
Funder
University Doctoral Research Fund Project
National Natural Science Foundation of China
Reference31 articles.
1. Photodeformable azobenzene-containing liquid crystal polymers and soft actuators;Pang;Adv. Mater.,2019
2. Light-responsive polymer membranes;Pantuso;Adv. Opt. Mater.,2019
3. Light-responsive shape-changing polymers;Stoychev;Adv. Opt. Mater.,2019
4. Photomobile polymer materials with complex 3D deformation, continuous motions, self-regulation, and enhanced processability;Toru;Adv. Opt. Mater.,2019
5. Tiptipakorn, S., Angkanawarangkana, C., Rimdusit, S., Hemvichian, K., and Lertsarawut, P. (2023). Investigation of multiple shape memory behaviors, thermal and physical properties of benzoxazine blended with diamino polysiloxane. Polymers, 15.