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Photothermally induced shape memory effects in thermoplastic polyurethanes with gold nanoparticles
Ainur F Abukaev1, Lada O Sineva1, Azaliia F Akhkiamova1,2
1Federal Research Centre of Problems of Chemical Physics and Medicinal Chemistry RAS, 142432 Chernogolovka, Russia.
Physical Chemistry Chemical Physics : PCCP
|April 29, 2026
Summary
This study shows gold nanoparticles in thermoplastic polyurethane enable light-activated shape memory effects. This photothermal heating allows for remote control in soft robotics and advanced materials.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Thermoplastic polyurethanes (TPU) are versatile polymers with shape memory properties.
- Controlling shape memory effects remotely and with spatial precision remains a challenge.
Purpose of the Study:
- To demonstrate a photoinduced shape memory effect in TPU-gold nanoparticle (AuNP) nanocomposites.
- To investigate the photothermal heating mechanism and its impact on TPU's crystalline phase.
- To analyze the influence of AuNPs on TPU's crystallization and polymorphic transitions.
Main Methods:
- Synergistic use of confocal micro-Raman spectroscopy and fast scanning chip calorimetry (FSCC).
- Photothermal heating of AuNPs using green laser irradiation.
- Structural and thermal analysis techniques.
Main Results:
- Localized melting of the TPU crystalline phase was induced by photothermal heating of AuNPs.
- AuNPs were found to influence the crystallization behavior and polymorphic transitions of TPU.
- A light-triggered thermal response was successfully demonstrated.
Conclusions:
- TPU-AuNP nanocomposites exhibit a photoinduced shape memory effect.
- The photothermal heating of AuNPs provides a mechanism for localized actuation.
- These nanocomposites show potential for remote, spatially resolved actuation in shape memory and soft robotic systems.
