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| Study on the Microstructures and Thermophysical Properties of the Spacer Fibre Papers |
| Received:September 02, 2024 |
| DOI：10.11980/j.issn.0254-508X.2025.03.008 |
| Key Words:multilayer insulation spacer fibre papers mercury intrusion porosimetry transient plane source method |
| Fund Project:甘肃省科技计划资助（22ZD6GA026）。 |
| Author Name | Affiliation | Postcode | | MA Xiaoyong | School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, Gansu Province, 730050 | 730050 | | CHEN Shuping* | School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, Gansu Province, 730050 | 730050 | | ZHANG Yajuan | School of Chemical Engineering, Lanzhou City University, Lanzhou, Gansu Province, 730070 | 730070 | | YU Yang | School of Energy and Power Engineering, Xian Jiaotong University, Xi’an, Shaanxi Province, 710049 | 710049 | | YU Haifeng | School of Energy and Power Engineering, Xian Jiaotong University, Xi’an, Shaanxi Province, 710049 | 710049 | | WANG Bo | School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, Gansu Province, 730050 | 730050 |
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| Abstract:Fibre papers are appropriate for utilisation as multilayer insulation spacers due to their lightweight， thin， and low thermal conductivity properties. The microstructures and thermophysical properties of glass-fibre paper， plant-fibre paper， and chemical-fibre paper were investigated experimentally using scanning electron microscopy， mercury intrusion porosimetry， and transient plane source methods. The results showed that the glass fibres and chemical fibres exhibited smooth surfaces and rounded cross-sections， whereas the plant fibres displayed natural textures and flat cross-sections. Significant differences in fibre diameter were observed among the various types of fibre papers， with the glass-fibre paper possessing the smallest fibre diameters. Among of the three kinds of fibre papers， chemical-fibre paper exhibited the lowest porosity （83.62%）， plant-fibre paper demonstrateed the greatest total pore volume （7.174×10-3 m3/kg）， and glass-fibre paper showed the largest total pore area （3 889 m2/kg）. In terms of thermophysical properties， glass-fibre paper exhibited the lowest horizontal and vertical thermal conductivities， as well as specific heat capacity. However， the thermal diffusivity of glass-fiber paper was significantly higher than that of plant-fibre paper and chemical-fibre paper. |
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