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Body-Temperature Programmable Soft-Shape Memory Hybrid Sponges for Comfort Fitting.

Balasundaram Selvan Naveen1, Azharuddin Bin Mohamed Naseem1, Catherine Jia Lin Ng1

  • 1School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.

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Summary

Porous shape memory hybrids using silicone and polycaprolactone (PCL) show excellent shape recovery. These lightweight, eco-friendly materials demonstrate high potential for applications like comfortable insoles and soles.

Keywords:
body temperaturecomfort fittinghydrogellightweightprogrammingrecoveryshape fixity ratioshape memory cycleshape memory hybridsshape recovery ratiosponge

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Area of Science:

  • Materials Science
  • Polymer Science
  • Biomaterials

Background:

  • Shape memory materials offer adaptive properties.
  • Porous structures enhance lightweight characteristics.
  • Polycaprolactone (PCL) and silicone hybrids are explored for advanced applications.

Purpose of the Study:

  • To fabricate and characterize porous shape memory hybrids.
  • To investigate the mechanical response and shape memory performance.
  • To evaluate the influence of matrix hardness and PCL ratio.

Main Methods:

  • Fabrication of porous hybrids with varying silicone hardness and PCL ratios.
  • Mechanical characterization under cyclic loading (with/without pre-straining/programming).
  • Shape memory performance evaluation after body-temperature programming.

Main Results:

  • Porous shape memory hybrids exhibit good shape memory effect (~90%) at higher PCL ratios.
  • Lightweight materials due to porous structures.
  • Eco-friendly fabrication process using reusable hydrogels.

Conclusions:

  • Porous shape memory hybrids demonstrate superior shape memory performance compared to solid versions.
  • Materials are lightweight and fabricated using an eco-friendly method.
  • High potential for applications in comfort fitting, such as insoles and soles.