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VACUUM ›› 2025, Vol. 62 ›› Issue (2): 22-27.doi: 10.13385/j.cnki.vacuum.2025.02.03

• Vacuum Technology Application • Previous Articles     Next Articles

Preparation and Characterization of Particle Modified Composite Vacuum Insulation Panels

SHEN Xiao1, JIN Hai2, ZHAN Heng2, ZHANG Haotian1, CHEN Zhou1   

  1. 1. School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China;
    2. Shanxi Jinju Coal Electrification Co., Ltd., Jincheng 048000, China
  • Received:2024-04-29 Online:2025-03-25 Published:2025-03-24

Abstract: Vacuum insulation panels (VIP), as a new type of insulation material, have been widely used in various industries. However, the existing chopped strand glass fiber core material VIP has the problems of high rebound rate and low service life, which limits its further development. Therefore, a particle-modified composite VIP with excellent comprehensive performance was prepared by adding nano fumed silica particles to the core material for modification. The microstructure, uniformity, compression rate and rebound rate of the as-prepared composite core material were tested, and the thermal conductivity and pressure sensitivity of the prepared VIP were studied. The results show that the particle modified composite VIP has excellent comprehensive performance, accompanied by a fumed silica particle mass fraction of 0%-15%. With the increasing of fumed SiO2, the compression rate decreases from 63.9% to 53.2%, and the rebound rate decreases from 74.9% to 64.3%. At the same time, the pressure sensitivity of VIP also shows a downward trend.

Key words: vacuum insulation panel, chopped strand glass fiber, fumed silica, thermal conductivity

CLC Number:  TB79

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