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<p>Currently, heat-not-burn (HNB) products are gaining increasing popularity, with reconstructed tobacco sheets (RTS) as the main heating medium. Due to the porous structure and poor thermal conductivity of RTS products, the aroma release during heating is uneven and the heating time is prolonged. In this study, Al<sub>2</sub>O<sub>3</sub> thermal conductive adhesive was prepared to enhance the thermal conductivity of RTS and subsequently applied to RTS products. The results showed that with 5&#xa0;mass% Al<sub>2</sub>O<sub>3</sub> filling, the thermal conductivity of RTS composite material increased to 0.4522 W·m<sup>−1</sup>·K<sup>−1</sup>, which was 29.2% higher than that of RTS without the thermal conductive adhesive. When the content was increased to 10 mass%, the thermal conductivity reached 0.5185&#xa0;W·m<sup>−1</sup>·K<sup>−1</sup>, an increase of 48.2%. Meanwhile, the thermal diffusion coefficient was 0.7745&#xa0;mm<sup>2</sup>·s<sup>−1</sup>, which was 280% higher than that of RTS without thermal conductive adhesive, indicating that Al<sub>2</sub>O<sub>3</sub> thermal conductive adhesive has great potential to improve the thermal conductivity of RTS products without affecting the organic components.</p>

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Preparation and application of thermal conductive adhesive for reconstructed tobacco sheets with Al2O3

  • 期刊论文

  • 发表日期：

    2025年12月7日

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  • Xiaowei Hu,
  • Jingxian Sun,
  • Fengfeng Zhang,
  • Junling Yang,
  • Ruixiang Wang,
  • Zhentao Zhang,
  • Zhongcheng Guo,
  • Shilu Zhou,
  • Qiang Wang,
  • Xinhua Song

摘要

Currently, heat-not-burn (HNB) products are gaining increasing popularity, with reconstructed tobacco sheets (RTS) as the main heating medium. Due to the porous structure and poor thermal conductivity of RTS products, the aroma release during heating is uneven and the heating time is prolonged. In this study, Al2O3 thermal conductive adhesive was prepared to enhance the thermal conductivity of RTS and subsequently applied to RTS products. The results showed that with 5 mass% Al2O3 filling, the thermal conductivity of RTS composite material increased to 0.4522 W·m−1·K−1, which was 29.2% higher than that of RTS without the thermal conductive adhesive. When the content was increased to 10 mass%, the thermal conductivity reached 0.5185 W·m−1·K−1, an increase of 48.2%. Meanwhile, the thermal diffusion coefficient was 0.7745 mm2·s−1, which was 280% higher than that of RTS without thermal conductive adhesive, indicating that Al2O3 thermal conductive adhesive has great potential to improve the thermal conductivity of RTS products without affecting the organic components.