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VACUUM ›› 2026, Vol. 63 ›› Issue (2): 47-54.doi: 10.13385/j.cnki.vacuum.2026.02.07

• Vacuum Technology Application • Previous Articles     Next Articles

Preparation and Characterization of Vacuum Insulated Panels With Composite Core of Poplar Wood Fiber

ZHANG Haotian1, JIN Hai2, YU Xiaoxue1, WANG Jiaxiang1, ZHAN Heng2, LI Kunzhao2, CHEN Zhou1   

  1. 1. Nanjing Tech University, Nanjing School of Mechanical and Power Engineering, Nanjing 211816, China;
    2. Shanxi Jinju Coal Electrochemical Co. Ltd. Jincheng 048000, China
  • Received:2025-04-17 Online:2026-03-25 Published:2026-03-27

Abstract: Vacuum Insulation Panel (VIP) is a kind of high-performance insulation material, which realizes extremely low thermal conductivity through the synergistic effect of vacuum technology and porous core material, and is widely used in green building, low-temperature cold chain, ultra-low-energy appliances, etc. It is an important direction for the development of insulation and energy-saving materials in the future. Most of the traditional VIP use glass fiber as the core material, but there are problems such as difficult to degrade and recycle, and prone to causing environmental pollution during production. Plant fiber is expected to solve the above problems owing to its wide source, degradable, green and other characteristics. However, because of its high thermal conductivity and poor mechanical properties, plant fiber needs inorganic fiber as a reinforcing phase to improve the overall performance of VIP. Therefore, in this paper, poplar fiber was selected as the core material matrix, and centrifugal glass wool was used as the reinforcing fiber to prepare a composite core material VIP with excellent overall performance, and the composite core material micro-morphology, uniformity, and compression rate and resilience were tested. The thermal, mechanical and aging properties of the as-prepared VIP were investigated. The results show that the comprehensive performance of poplar fiber composite core VIP is excellent, along with the centrifugal glass wool content increasing from 0% to 75 wt.%, the thermal conductivity of poplar fiber composite core decreases by 31.78%, the thermal conductivity of poplar fiber composite core VIP decreases by 50.05%, the tensile strength increases by 420.21%, and the sensitivity of VIP to air pressure is also decreased.

Key words: vacuum insulation panel, plant fiber, centrifugal glass wool, thermal conductivity

CLC Number:  TB79

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