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<p>This work presents a novel strategy for constructing flexible material by integrating microencapsulated phase change materials (MPCMs) into a porous polydimethylsiloxane (PDMS). The resulting composite exhibits stable MPCMs within the abundant distributed internal pore network, confirmed by scanning electron microscopy. Differential scanning calorimetry reveals a well-defined phase transition temperature and a high latent heat of fusion of 44.3&#xa0;kJ/kg, enabling efficient thermal energy storage and release. Furthermore, the composite demonstrates remarkable mechanical resilience (tensile strength: 0.59&#xa0;MPa) and superior hydrophobicity (water contact angle: 110°), ensuring durability and resistance to moisture. Thermal insulation evaluations under both constant heat and direct solar exposure showcase the material's exceptional performance, achieving temperature differentials of 9.4 and 6.2&#xa0;°C, respectively. This superior insulating capability stems from the synergistic effect of the low thermal conductivity of the porous PDMS matrix and the latent heat storage/release properties of the MPCMs.</p> Graphical Abstract <p></p>

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Development and thermal performance of porous PDMS composites with microencapsulated phase change materials for enhanced thermal insulation

  • 期刊论文

  • 发表日期：

    2025年4月25日

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  • Changling Wang,
  • Zhaofeng Dai,
  • Juan Yang,
  • Baobin Liu,
  • Yuanzhi Gao,
  • Dongxu Wu,
  • Yujiang Xia,
  • Jing Yu,
  • Weidong Yan,
  • Xiaosong Zhang

摘要

This work presents a novel strategy for constructing flexible material by integrating microencapsulated phase change materials (MPCMs) into a porous polydimethylsiloxane (PDMS). The resulting composite exhibits stable MPCMs within the abundant distributed internal pore network, confirmed by scanning electron microscopy. Differential scanning calorimetry reveals a well-defined phase transition temperature and a high latent heat of fusion of 44.3 kJ/kg, enabling efficient thermal energy storage and release. Furthermore, the composite demonstrates remarkable mechanical resilience (tensile strength: 0.59 MPa) and superior hydrophobicity (water contact angle: 110°), ensuring durability and resistance to moisture. Thermal insulation evaluations under both constant heat and direct solar exposure showcase the material's exceptional performance, achieving temperature differentials of 9.4 and 6.2 °C, respectively. This superior insulating capability stems from the synergistic effect of the low thermal conductivity of the porous PDMS matrix and the latent heat storage/release properties of the MPCMs.

Graphical Abstract