期刊
POLYMER
卷 179, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2019.121639
关键词
Poly(hexahydrotriazine); Hexagonal boron nitride; Recycle
资金
- Korea Institute of Science and Technology (KIST) Institutional Program
- Materials and Components Technology Development Program of MOTIE/KEIT, Republic of Korea [10076464]
- Ministry of Trade, Industry and Energy (MOTIE)
- Korea Institute for the Advancement of Technology (KIAT) [P0004101]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10076464, P0004101] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Shape, size, and orientation of fillers within polymer matrix are important factors for realizing various composite functionalities. Here, we describe an industrially scalable approach to preparing composites bearing highly aligned model hexagonal boron nitride filler (hBN) by simple melt-pressing. This outcome is achieved by using a malleable but thermal stiffening polymer matrix. The matrix maintains or even increases its stiffness during processing at elevated temperatures, producing the composites with highly aligned hBN and consequently a high thermal conductivity (28 W/mK). Furthermore, the composite bearing aligned hBN exhibits a 62% reduction in oxygen permeation with only 2.7 vol% of hBN. Since the matrix can be chemically depolymerized with an aid of acid, it is also possible to recover the hBN from the composite without physical/chemical denaturation of the filler, thus the recovered filler can be re-used in the future.
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