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Updated: Aug 18, 2025

Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold

Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold

Published on: October 23, 2015

Halogen-bonded shape memory polymers.

Hongshuang Guo¹, Rakesh Puttreddy², Turkka Salminen³

¹Smart Photonic Materials, Faculty of Engineering and Natural Sciences, Tampere University, Korkeakoulunkatu 3, FI-33720, Tampere, Finland.

Nature Communications

|December 5, 2022

Summary

This summary is machine-generated.

Researchers developed a new shape-memory polymer using halogen bonding (XB). This material can be programmed by hand and recovers its shape using body heat, paving the way for smart medical devices.

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Area of Science:

Supramolecular chemistry
Materials science
Polymer science

Background:

Halogen bonding (XB) is a crucial non-covalent interaction in organic synthesis and crystal engineering.
Developing stimuli-responsive soft materials using XB remains challenging due to its weak nature.
Existing materials lack precise control over shape memory properties for advanced applications.

Purpose of the Study:

To create a novel liquid crystalline network with reversible thermo-responsive shape memory behavior.
To investigate the role of I···N halogen bonds in shape programming and recovery.
To explore potential applications in areas like medical devices.

Main Methods:

Fabrication of a liquid crystalline network with both permanent covalent and dynamic halogen bond crosslinks.
Systematic structure-property-performance studies to elucidate the mechanism of shape memory.
Demonstration of shape programming via human-hand operation and a micro-robotic injection model for shape morphing.

Main Results:

The developed network exhibits reversible thermo-responsive shape memory behavior.
I···N halogen bonds enable temporary shape fixation at room temperature and recovery at body temperature (37°C).
Versatile shape programming and complex 1D to 3D shape morphing in aqueous media were achieved.

Conclusions:

The I···N halogen bonds are essential for the observed shape memory effect.
This work expands the possibilities for creating smart supramolecular constructs with tunable mechanical and thermal properties.
The findings offer a promising platform for developing advanced materials, particularly for future medical devices.