| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Thermal Properties and Infrared Stealth Performance of Paraffin Phase Change Microcapsules |
| WANG Xingang*, LIU Shicheng, LEI Weiyu, ZHANG Chenyang
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| School of Infrastructure Engineering, Nanchang University, Nanchang 330031, China |
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Abstract Paraffin phase change microcapsules were prepared by in-situ polymerization, using paraffin (PW) as core material and melamine urea for-maldehyde resin (MUF) as wall material. The micro morphology, chemical structure, heat storage performance, infrared stealth perfor-mance and thermal stability of microcapsules were analyzed by ESEM, FTIR, DSC, infrared thermal imager, thermal cycling test and fragmentation test. The results show that PM1 (core wall mass ratio 3 ∶ 2) and PM2 (core wall mass ratio 2 ∶ 1) have good heat storage performance, with encapsulation efficiency of 74.82% and 75.12%, respectively, and phase change latent heat of 140.54 J/g and 141.10 J/g, respectively. PM2 has good thermal stability, with the mass loss rate of 8.8% and the fragmentation rate of 2.5%. The epoxy resin doped with PM2 has good infrared stealth performance. When heated in water bath at 80 ℃ for 12 min, the surface temperature of PMER-40% (m(microcapsule) ∶m(epoxy resin)=4 ∶ 6 ) is 12.9 ℃ lower than that of epoxy resin.
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Published:
Online: 2023-01-03
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| Fund:National Natural Science Foundation of China (52062032, 51972158), Major Discipline Academic and Technical Leaders Training Program of Jiangxi Province (20204BCJ22001) and Jiangxi Provincial Natural Science Foundation (20212ACB204017). |
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2022, Vol. 36 
