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Triple Stimuli-Responsive Flexible Shape Memory Foams with Super-Amphiphilicity.

Xinyun Ding1, Yunan Shi1, Shijie Xu1

  • 1School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China.

Small (Weinheim an Der Bergstrasse, Germany)
|December 3, 2022
PubMed
Summary

Researchers developed a novel, lightweight, multi-responsive shape memory foam using carbon foam and polycaprolactone. This advanced material exhibits excellent shape memory effects and can act as a sensor for detecting electrolyte leakage.

Keywords:
carbonizationelectrothermal conversionphotothermal conversionshape memory foamssuper-amphiphilicity

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Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Highly porous, multi-responsive shape memory foams offer unique advantages for lightweight 3D materials.
  • Developing foams with tunable responses for diverse applications remains a key challenge.

Purpose of the Study:

  • To fabricate a novel thermo-, electro-, and photo-responsive shape memory composite foam.
  • To explore the dual role of carbon foam as a structural framework and energy conversion network.

Main Methods:

  • Commercial melamine sponge (MS) was transformed into highly porous carbon foam (CF) via a multi-step carbonization protocol.
  • In situ crosslinked polycaprolactone (PCL) layers were incorporated onto the CF skeleton to create the cPCL@CF composite foam.

Main Results:

  • The cPCL@CF composite foam demonstrated high electrical conductivity (≈140 S m⁻¹) and excellent light absorption (≈97.7%).
  • The material exhibited sensitive electro- and photo-induced shape memory effects (SME) with high shape fixation and recovery ratios.
  • The foam functioned as a sensor, providing rapid electric signals upon contact with salt solutions or lithium-ion battery electrolytes.

Conclusions:

  • The developed cPCL@CF composite foam is a promising lightweight, multi-responsive material with significant potential in shape memory applications.
  • Its unique properties enable its use as a novel sensor for detecting electrolyte leakage, particularly in lithium-ion batteries.