Carbon Layer Formation on Hexagonal Boron Nitride by Plasma Processing in Hydroquinone Aqueous Solution
Carbon Layer Formation on Hexagonal Boron Nitride by Plasma Processing in Hydroquinone Aqueous Solution
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DOI：
10.1021/acsami.2c15951
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发表时间：
2022-11-17
影响因子：
9.5
通讯作者：
Terashima, Kazuo
中科院分区：
文献类型：
--
作者：
Inoue, Kenichi;Sakakibara, Noritaka;Terashima, Kazuo
虽然六方氮化硼（hBN）是复合材料中的导热和电绝缘填料，但表面改性仍然困难，这限制了其可固化和功能化。在这项研究中，碳层的形成hBN颗粒在对苯二酚水溶液中的等离子体处理作为一种表面改性技术进行了研究。结果表明，在对苯二酚辅助等离子体改性的hBN（HQpBN）颗粒上均匀分布着具有聚合氢化无定形碳特征的碳组分。电子自旋共振测量显示，丰富的未成对电子在HQpBN，表明缺陷形成的hBN等离子体处理和碳层含有悬挂键。hBN上的缺陷可以帮助碳层的附着，而悬挂键可以作为进一步官能化的反应位点。HQpBN上的碳层成功地用异氰酸酯基团官能化，从而证实了该碳层促进表面改性的能力。这些结果表明，在hBN上形成的碳层可以在有机/无机复合材料中提供可设计的界面。
Although hexagonal boron nitride (hBN) is a thermally conductive and electrically insulating filler in composite materials, surface modification remains difficult, which limits its dispersibility and functionalization. In this study, carbon layer formation on hBN particles by plasma processing in hydroquinone aqueous solution was investigated as a surface modification technique. Carbon components with features of polymeric hydrogenated amorphous carbon were found to be uniformly distributed on the hydroquinone-aided plasma-modified hBN (HQpBN) particles. Electron spin resonance measurements revealed abundant unpaired electrons in HQpBN, indicating that defects were formed on hBN by plasma processing and that the carbon layer contained dangling bonds. The defects on hBN could help in the attachment of the carbon layer, whereas the dangling bonds could act as reactive sites for further functionalization. The carbon layer on HQpBN was successfully functionalized with isocyanate groups, thus confirming the ability of this carbon layer to facilitate surface modification. These results demonstrate that the carbon layer formed on hBN can provide a designable interface in organic/inorganic composite materials.