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<p>Using polyethylene glycol (PEG) as phase change material (PCM), a new type of PEG/Tuff composite PCMs (CPCMs) made of PEG infiltrated in tuff with various mass percentage was prepared via direct impregnation technique. The result of the form-stability test suggested that the maximum mass loading percentage of PEG in tuff was about 70%. In addition, the 70%PEG/Tuff with different mass fractions of boron nitride (BN) particles loadings were also made and the findings reveal that 5%BN loading leads to a substantial increase of up to 188% in thermal conductivity while maintaining the melting enthalpy of the composite. The melting temperature and latent heat of the 70%PEG/Tuff/5BN CPCM are determined from DSC measurement at 61.8 °C and 54.6&#xa0;J&#xa0;g<sup>−1</sup>, respectively. The thermal cycle test indicated that the 70%PEG/Tuff/5BN CPCM displayed good thermal reliability after experiencing 100 thermal cycles. Furthermore, the composite has enhanced thermal storage/release rate. In summary, the as-prepared 70%PEG/Tuff/5BN CPCM has promising potentials for building energy saving.</p>

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Preparation and thermal performances of polyethylene glycol/tuff/boron nitride composite phase change materials

  • 期刊论文

  • 发表日期：

    2025年9月30日

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  • Jianfen Shen,
  • Qiang Song,
  • Xing Liu,
  • Chaoming Wang,
  • Lei Zhang,
  • Rui Zheng

摘要

Using polyethylene glycol (PEG) as phase change material (PCM), a new type of PEG/Tuff composite PCMs (CPCMs) made of PEG infiltrated in tuff with various mass percentage was prepared via direct impregnation technique. The result of the form-stability test suggested that the maximum mass loading percentage of PEG in tuff was about 70%. In addition, the 70%PEG/Tuff with different mass fractions of boron nitride (BN) particles loadings were also made and the findings reveal that 5%BN loading leads to a substantial increase of up to 188% in thermal conductivity while maintaining the melting enthalpy of the composite. The melting temperature and latent heat of the 70%PEG/Tuff/5BN CPCM are determined from DSC measurement at 61.8 °C and 54.6 J g−1, respectively. The thermal cycle test indicated that the 70%PEG/Tuff/5BN CPCM displayed good thermal reliability after experiencing 100 thermal cycles. Furthermore, the composite has enhanced thermal storage/release rate. In summary, the as-prepared 70%PEG/Tuff/5BN CPCM has promising potentials for building energy saving.