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Related Experiment Video

Updated: Aug 14, 2025

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Three-Dimensional-Printed Shape Memory Biomass Composites for Thermal-Responsive Devices.

Hongjie Bi1, Xin Jia1, Gaoyuan Ye1

  • 1Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education of China, College of Material Science and Engineering, Northeast Forestry University, Harbin, China.

3D Printing and Additive Manufacturing
|January 19, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed 3D-printed shape memory biomass composites using polyurethane, polycaprolactone (PCL), and wood flour (WF). These materials exhibit excellent shape recovery and can be triggered by heat or light, offering versatile applications.

Keywords:
3D printingbiomass compositesphotothermal conversionshape memorythermal response

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Area of Science:

  • Materials Science
  • Polymer Science
  • Biocomposites

Background:

  • Shape memory materials offer adaptive functionalities.
  • Biomass composites present sustainable alternatives in materials engineering.
  • 3D printing enables complex structure fabrication.

Purpose of the Study:

  • To develop novel 3D-printed shape memory biomass composites.
  • To investigate the influence of polycaprolactone (PCL) content on material properties.
  • To achieve photothermal response shape memory performance using carbon black (CB).

Main Methods:

  • Melt blending and extrusion of polyurethane, PCL, and wood flour (WF).
  • Fabrication of 3D-printed composite structures.
  • Characterization using X-ray diffraction, differential scanning calorimetry, and mechanical testing.
  • Evaluation of shape memory properties under thermal and photothermal stimuli.

Main Results:

  • Composites exhibited tunable shape memory transition temperatures and high shape fixing rates (∼100%) at 30 wt.% PCL.
  • Tensile strength varied with PCL content, while elongation at break decreased.
  • Addition of carbon black (CB) enabled photothermal response and improved thermal conductivity.
  • Shape recovery time was dependent on specimen thickness and light intensity.

Conclusions:

  • Adjustable PCL content effectively controls shape memory properties in 3D-printed biomass composites.
  • Incorporation of CB provides photothermal responsiveness for enhanced shape memory performance.
  • The developed materials demonstrate potential for advanced functional applications requiring stimuli-responsive behavior.