Self-healing thermally conductive adhesives. (January 2014)

• Record Type: Journal Article
• Authors: Lafont, Ugo; Moreno-Belle, Christian; van Zeijl, Henk; van der Zwaag, Sybrand
• Other Names: Bond Ian P guest-editor.; Trask Richard S guest-editor.; Varley Russell J guest-editor.
• Is Part Of: Journal of intelligent material systems and structures. Volume 25:Number 1(2014:Jan.)
• Page Start: 67
• Page End: 74
• Publication Date: 2014-01
• Subjects: Self-healing -- composites -- adhesive -- cohesion recovery -- thermal conduction; Smart materials -- Periodicals; Intelligent control systems -- Periodicals; Artificial intelligence -- Periodicals; Matériaux intelligents -- Périodiques; Commande intelligente -- Périodiques; Intelligence artificielle -- Périodiques; 620.11
• DOI: 10.1177/1045389X13498314
• Languages: English
• ISSNs: 1045-389X

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.