Research PaperA facile synthesis of solid-solid phase change material for thermal energy storage

- Solid-solid phase change materials based on PEG and PAPI were prepared.
- The brief and concise method made the industrial applications of PCMs possible.
- The maximum latent heat of prepared PCMs reached 111.7 J/g.
- The prepared PCMs show the potential for thermal energy storage application.
- The prepared PCMs will make an effective utilization of waste energy.

Thermosetting polyurethane based on Polyethylene glyol and Polyaryl polymethylene isocyanate was prepared through solvent-free bulk polymerization for solid-solid phase change materials. Chemical structure, crystallization behavior, phase change behavior, thermal reliability and thermal stability of Polyethylene glyol based phase change materials were extensively studied by fourier transform infrared spectroscopy, X-ray diffraction, polarizing optical microscopy, differential scanning calorimetry, thermal cycling testing and thermogravimetric analysis, respectively. The polarizing optical microscopy and X-ray diffraction results indicated that the crystal structure of prepared phase change materials was not affected by the crosslink structure. Differential scanning calorimetry measurements showed that prepared phase change materials possess high latent heat and appropriate phase change temperature for the application of thermal energy storage. The maximum latent heat of phase change materials in melting and freezing process reached 111.7 J/g and 110.4 J/g, respectively. Thermal cycling test and thermogravimetric analysis results demonstrated the good thermal reliability and stability of prepared phase change materials. The prepared phase change materials showed the potential for thermal energy storage application and will make an effective utilization of waste energy.