Spin crossover particle shielding upon grinding in thermoplastic polyurethane composites

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Spin crossover (SCO) materials exhibit unique thermal and magnetic properties.
• Integrating SCO materials into functional devices requires robust processing methods.
• Mechanical processing like ball milling can often deactivate SCO materials.

Purpose of the Study:

• To investigate the effect of a polyurethane matrix on the integrity of SCO particles during ball milling.
• To assess the potential of SCO@polyurethane composites for device integration.

Main Methods:

• Ball milling experiments were performed on pristine SCO powder.
• Ball milling was also conducted on SCO@polyurethane composite samples.
• The structural and functional integrity of SCO particles before and after milling was analyzed.

Main Results:

• Ball milling of SCO powder alone led to particle deactivation.
• SCO particles embedded within a polyurethane (TPU) matrix were protected from deactivation during ball milling.
• The TPU matrix acted as a physical shield, preserving SCO properties.

Conclusions:

• Polyurethane matrices effectively shield SCO particles during mechanical processing.
• This protective effect enables the integration of SCO materials into devices via robust manufacturing techniques.
• The study highlights a viable strategy for enhancing the processability of SCO materials.