期刊
APPLIED SURFACE SCIENCE
卷 569, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2021.151094
关键词
Boron nitride; Covalent modification; Thermal conductivity
类别
资金
- Science and Technology Development Project of Jilin Province [20200401038GX]
- National Natural Science Foundation of China [51673197]
The study shows that by reacting h-BN with sulfonyl chloride at room temperature, active groups can be generated, which can then be used to introduce PEG through a DielsAlder reaction. This improves the dispersibility and compatibility of h-BN in epoxy resin matrix, leading to enhanced thermal conductivity of the composites.
The wide application of hexagonal boron nitride (h-BN) is limited because it is difficult to achieve functionalization with trace amounts of active groups. We noticed that a considerable amount of hydroxyl and amino groups are generated after mixing h-BN and sulfonyl chloride at room temperature for 48 h. Subsequently, these active groups are used to react with furoyl chloride, and polyethylene glycol (PEG) is introduced through a mild DielsAlder reaction to improve its dispersibility and compatibility with epoxy resin matrix. The modified h-BN are characterized by Fourier transform infrared (FT-IR), thermogravimetric (TGA), and transmission electron microscopy (TEM) to investigate the covalent modification results and its structure. Finally, the thermal conductivity of epoxy composites with different filler content show that the h-BN covalently modified by PEG can improve the thermal conductivity of the composites.
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