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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
Published on: October 23, 2015
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Exploring the Adaptability of 4D Printed Shape Memory Polymer Featuring Dynamic Covalent Bonds
Jing Zhang1,2, Mingkun Xu1,2, Nan Zhang1
1State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
Small (Weinheim an Der Bergstrasse, Germany)
|September 10, 2024
Summary
Researchers developed a new dynamic shape memory polymer (DSMP) for 4D printing using digital light processing. This advanced material enables self-healing, recycling, and photothermal shape morphing for complex applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Additive Manufacturing
Background:
- 4D printing (4DP) using digital light processing (DLP) offers high precision for complex shapes.
- Developing high-performance dynamic shape memory polymers (DSMPs) for DLP is challenging due to material incompatibilities.
Purpose of the Study:
- To create a mechanically robust DSMP compatible with DLP printing.
- To enable advanced functionalities like self-healing, recycling, and photothermal control in 4D printed structures.
Main Methods:
- Incorporation of dynamic covalent imine bonds linking polyimide rigid segments into the polymer structure.
- Utilizing digital light processing (DLP) for 4D printing the developed DSMP.
Main Results:
- The DSMP exhibits excellent mechanical properties (tensile strength ~41.7 MPa, modulus ~1.63 GPa) and thermal stability (Tg ~113°C).
- 4D printed structures demonstrate solid-state plasticity, enabling reconfiguration, self-healing, and recycling.
- The material possesses an intrinsic photothermal effect for dual-mode triggered shape morphing.
Conclusions:
- This work expands the applications of high-performance 4D printed configurations.
- The developed DSMP offers a sustainable approach to material use and addresses environmental concerns.
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