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<p>Hexagonal boron nitride (h-BN) is used as a nano-filler in polymer composites because of its exceptional properties such as high insulation, superior thermal conductivity, and excellent thermal stability. In order to further enhance its improvement on the performance of polymer matrices, the rational regulation of the surface of h-BN is very important. Herein, we conducted functionalization modification on h-BN and confirmed the successful preparation of hydroxy-modified h-BN (h-BN–OH) and phthalic anhydride-modified h-BN (h-BN@PAH) through infrared spectroscopy, thermal stability analysis, and X-ray photoelectron spectroscopy (XPS). The prepared modified h-BN was blended with linear low-density polyethylene (LLDPE) to prepare composites, aiming to enhance the DC breakdown strength. Under a load of 0.5%, the LLDPE composite containing h-BN@PAH reached 338.12&#xa0;kV/mm, which is about 20% higher than that of pure LLDPE. This work provides a simple and effective strategy of nanoparticle interface engineering for developing polymer nanocomposites.</p>

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Functional modification of hexagonal boron nitride and its impact on DC breakdown performance of LLDPE

  • 期刊论文

  • 发表日期：

    2026年7月4日

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  • Dongyu Huang,
  • Xuan Zhang,
  • Jiayang Qu,
  • Ruixiang Yao,
  • Wenfei Li,
  • Zhanhai Yao

摘要

Hexagonal boron nitride (h-BN) is used as a nano-filler in polymer composites because of its exceptional properties such as high insulation, superior thermal conductivity, and excellent thermal stability. In order to further enhance its improvement on the performance of polymer matrices, the rational regulation of the surface of h-BN is very important. Herein, we conducted functionalization modification on h-BN and confirmed the successful preparation of hydroxy-modified h-BN (h-BN–OH) and phthalic anhydride-modified h-BN (h-BN@PAH) through infrared spectroscopy, thermal stability analysis, and X-ray photoelectron spectroscopy (XPS). The prepared modified h-BN was blended with linear low-density polyethylene (LLDPE) to prepare composites, aiming to enhance the DC breakdown strength. Under a load of 0.5%, the LLDPE composite containing h-BN@PAH reached 338.12 kV/mm, which is about 20% higher than that of pure LLDPE. This work provides a simple and effective strategy of nanoparticle interface engineering for developing polymer nanocomposites.