Self-healing thermally conductive adhesives

Author:

Lafont Ugo12,Moreno-Belle Christian2,van Zeijl Henk3,van der Zwaag Sybrand2

Affiliation:

1. Materials Innovation Institute, Delft, The Netherlands

2. Novel Aerospace Materials, Faculty of Aerospace Engineering, Delft University of Technology, Delft, The Netherlands

3. DIMES, Faculty of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, Delft, The Netherlands

Abstract

Thermally conductive composites with a temperature-triggered self-healing response were produced by dispersing boron nitride or graphite particles into two types of polysulphide-based thermoset matrices. The composites produced exhibit recovery of both cohesion and adhesion properties upon thermally activated healing. Using a mild healing temperature (65°C), the materials show full recovery of their initial adhesive strength during multiple healing cycles. The composites behave differently regarding the cohesion recovery: 20%–100% recovery is achieved depending on the filler type, filler loading and the type of matrix. The thermal conductivity of the composites increases with the amount of filler. Values of 1 and 2 W/m K can be achieved for the boron nitride and graphite-based composite, respectively. The results presented in this work clearly show that multifunctional materials with different functionalities and mechanical self-healing responses can be designed using this strategy.

Publisher

SAGE Publications

Subject

Mechanical Engineering,General Materials Science

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