Fully Recyclable Vitrimer Composite with Segregated Filler Structures for Efficient Heat Dissipation
발표자
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초록
내용
As current electronics get lighter, denser in energy, and being more eco-friendly, relevant industries strive to develop recyclable polymer composite with high thermal conductivity (TC). However, a trade-off between composite weight and TC prohibits constant increase in filler loading. To develop recyclable polymer composite with high TC and lightweight, therefore, a new poly(β-amino ester) vitrimer was synthesized and composites were prepared by mixing the vitrimer and hBN in powder forms. Ascribing to a unique characteristic of vitrimer, continuous heat conduction pathways could be well-constructed as the hBN was confined between malleable vitrimer domains. As a result, a TC of 10 W/mK was achieved at only 34 vol% hBN, which is 20 vol% less than the loading for composites prepared by mixing liquid monomer and filler. To emphasize efficient recyclability of the composites, composite reprocessing and filler recovery by depolymerizing the matrix in heated water were also demonstrated.