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Updated: Jun 11, 2025
08:17
Free-form Light Actuators — Fabrication and Control of Actuation in Microscopic Scale
Published on: May 25, 2016
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Main-Chain Azobenzene Poly(ether ester) Multiblock Copolymers for Strong and Tough Light-Driven Actuators
Chong He1,2, Yang Xiao1, Sheng Wang1
1Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
ACS Applied Materials & Interfaces
|October 9, 2024
Summary
Researchers developed novel photoresponsive polymer fibers from azobenzene multiblock copolymers. These strong, silk-like fibers exhibit fast light-induced bending and contraction, enabling applications in light-driven actuators and soft robotics.
Area of Science:
- Polymer Science
- Materials Science
- Robotics
Background:
- Stimulus-responsive polymers are of great interest for actuators and soft robotics.
- Photoresponsive materials offer remote manipulation capabilities.
Purpose of the Study:
- To synthesize and characterize novel photoresponsive main-chain actuators.
- To investigate the potential of azobenzene poly(ether ester) multiblock copolymers (mBCPs) for light-driven applications.
Main Methods:
- Synthesis of mBCPs via cascade polycondensation-coupling ring-opening polymerization.
- Preparation of oriented fibers using melt spinning.
- Characterization of thermal, mechanical, and photoresponsive properties.
Main Results:
- mBCPs exhibited tunable thermal, mechanical, and microphase separation behaviors.
- Melt-spun fibers demonstrated high strength (~1000 MPa) and elongation at break, comparable to spider silk.
- Fibers showed fast, reversible photoinduced bending and contraction, lifting up to 250 times their own weight.
Conclusions:
- Azobenzene mBCP fibers are promising materials for light-driven actuators and telecontrolled robotic arms.
- The developed materials offer high performance and remote manipulation capabilities for advanced applications.
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