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A thermo-reversible silicone elastomer with remotely controlled self-healing
E Ogliani1, L Yu1, I Javakhishvili1
1Danish Polymer Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark Søltofts Plads, Building 229, 2800 Kgs Lyngby Denmark al@kt.dtu.dk.
RSC Advances
|May 11, 2022
Summary
This study introduces a novel, recyclable silicone elastomer that is self-healing and stimuli-responsive. This advanced material offers enhanced durability and reliability for demanding applications.
Area of Science:
- Materials Science
- Polymer Chemistry
Background:
- Soft thermoplastic elastomers are highly sought after for their durability and reliability.
- Silicone elastomers, while soft and durable, lack thermoplasticity and can fail under extreme conditions.
Purpose of the Study:
- To develop a thermo-reversible, self-healing, and recyclable silicone-based elastomer.
- To overcome the limitations of conventional silicone elastomers.
Main Methods:
- Incorporation of supramolecular 2-ureido-4[1H]-pyrimidone (UPy) self-assembling motifs via free radical polymerization.
- Stimuli-responsivity achieved through UPy motifs and incorporation of Fe3O4 particles for magnetic field-triggered self-healing.
Main Results:
- The novel elastomer exhibits self-healing properties triggered by direct or indirect heating (magnetic field).
- The material demonstrates excellent recyclability due to temperature responsiveness and high thermal stability, withstanding multiple reprocessing cycles.
- The developed elastomer maintains its properties after repeated processing.
Conclusions:
- The novel silicone-based elastomer offers a unique combination of self-healing, recyclability, and stimuli-responsiveness.
- This material presents a promising solution for applications requiring soft, reliable, and durable elastomers.
- The developed material is suitable for various applications demanding high performance under extreme conditions.
