Main-Chain Azobenzene Poly(ether ester) Multiblock Copolymers for Strong and Tough Light-Driven Actuators DOI
He Chong, Yang Xiao, Sheng Wang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(42), P. 56469 - 56480

Published: Oct. 9, 2024

The stimulus-responsive polymeric materials have attracted great research interest, especially those remotely manipulated with potential applications in actuators and soft robotics. Here we report a photoresponsive main-chain actuator based on azobenzene poly(ether ester) multiblock copolymer (mBCP) thermoplastic elastomers, (PTAD-b-PTMO-b-PTAD)n, which were synthesized by cascade polycondensation-coupling ring-opening polymerization method using poly(tetramethylene oxide) (PTMO) azobenzene-containing cyclic oligoesters (COTADs) as monomers. thermal, mechanical, microphase separation behaviors of mBCPs could be flexibly tuned altering the ratios soft-to-hard segments block number (n). oriented mBCP fibers prepared melt spinning, showing reversible properties remarkably high strength (∼1000 MPa) elongation at break comparable to spider silks. Fast photoinduced bending contraction successfully achieved these work power densities energy conversion efficiency, enabling it lift up about 250 times its own weight. Moreover, can take out inside tube UV-light control. These applied light-driven or telecontrolled robot arms.

Language: Английский

Robust cross-linked polyurethane elastomers with reprocessing capabilities and flame-retardant from renewable vanillin DOI

Tongshuai Tian,

Teng Zhang, Lei Liu

et al.

Polymer Degradation and Stability, Journal Year: 2025, Volume and Issue: 234, P. 111240 - 111240

Published: Jan. 31, 2025

Language: Английский

Citations

1
Tailoring Diels–Alder Cross-Linked Liquid Crystal Elastomers for Spatially Programmable Monolithic Actuators DOI
Yue Liu, Qing Yang, Qing Liu

et al.

ACS Macro Letters, Journal Year: 2025, Volume and Issue: unknown, P. 495 - 501

Published: March 30, 2025

Liquid crystal elastomers with thermo-reversible Diels-Alder cross-links (DALCEs) offer exceptional reprocessability and mild-temperature reprogrammability, enabling repeated fabrication of diverse actuators. However, optimizing their molecular design refabrication protocols remains crucial to further unlocking potential. This work systematically investigates DALCEs synthesized via aza-Michael addition reactions between RM82, furfurylamine, various chain extenders (phenylethylamine, ethylamine, butylamine, hexylamine, octylamine, 6-amino-1-hexanol). The effects cross-linking density extender selection on phase behavior, thermomechanical properties, actuation performance have been thoroughly examined. results show that a PEA-based formulation moderate achieves the most balanced performance. Based this optimized formulation, novel (re)fabrication strategy is introduced by harnessing DALCEs' intrinsic reprocessability, self-healing properties. employs multilevel fiber programming before monolithic actuator formation, spatially controlled liquid alignment facilitating iterative refinement through reconstruction. Consequently, complex morphing behaviors in disk films stress-modulating functions tubular actuators were demonstrated. establishes versatile, easily material platform for programmable, dynamic actuators, paving way advanced applications soft robotics adaptive devices.

Language: Английский

Citations

0
Main-Chain Azobenzene Poly(ether ester) Multiblock Copolymers for Strong and Tough Light-Driven Actuators DOI
He Chong, Yang Xiao, Sheng Wang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(42), P. 56469 - 56480

Published: Oct. 9, 2024

The stimulus-responsive polymeric materials have attracted great research interest, especially those remotely manipulated with potential applications in actuators and soft robotics. Here we report a photoresponsive main-chain actuator based on azobenzene poly(ether ester) multiblock copolymer (mBCP) thermoplastic elastomers, (PTAD-b-PTMO-b-PTAD)n, which were synthesized by cascade polycondensation-coupling ring-opening polymerization method using poly(tetramethylene oxide) (PTMO) azobenzene-containing cyclic oligoesters (COTADs) as monomers. thermal, mechanical, microphase separation behaviors of mBCPs could be flexibly tuned altering the ratios soft-to-hard segments block number (n). oriented mBCP fibers prepared melt spinning, showing reversible properties remarkably high strength (∼1000 MPa) elongation at break comparable to spider silks. Fast photoinduced bending contraction successfully achieved these work power densities energy conversion efficiency, enabling it lift up about 250 times its own weight. Moreover, can take out inside tube UV-light control. These applied light-driven or telecontrolled robot arms.

Language: Английский

Citations

1