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Effects of microencapsulated phase change materials on the performance of asphalt binders

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  • Wei, Kun
  • Wang, Yachuan
  • Ma, Biao

Abstract

This work aims at evaluating the physical properties, storage stability, and temperature-adjustable performance of asphalt binder modified with microencapsulated phase-change materials (micro-PCMs). Micro-PCMs with melamine–formaldehyde (MF) resin shells and n-tetradecane cores are fabricated through in situ polymerization. The MF resin shell successfully encapsulates the n-tetradecane core. The prepared micro-PCMs have spherical profiles, smooth surfaces, and particle diameters of 100 μm–200 μm. In addition, the micro-PCMs exhibit high phase-change enthalpy and excellent thermal stabilities. A neat asphalt binder is modified with various amounts of micro-PCMs modifiers. The addition of micro-PCMs does not considerably affect the physical properties of the modified asphalt. However, excessive micro-PCMs content will adversely affect the storage stability of asphalts modified with micro-PCMs. The temperature change rate of the micro-PCMs modified asphalt near the phase-transition temperature of the micro-PCMs decreases with the increase in micro-PCMs content. The specific heat capacity of the micro-PCM-modified asphalt shows a large peak near the phase-transition temperature of the micro-PCMs, and the peak value of the asphalt modified with micro-PCMs increases with increasing micro-PCMs content.

Suggested Citation

  • Wei, Kun & Wang, Yachuan & Ma, Biao, 2019. "Effects of microencapsulated phase change materials on the performance of asphalt binders," Renewable Energy, Elsevier, vol. 132(C), pages 931-940.
    • Handle: RePEc:eee:renene:v:132:y:2019:i:c:p:931-940
    DOI: 10.1016/j.renene.2018.08.062
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    References listed on IDEAS

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    1. Llorach-Massana, Pere & Peña, Javier & Rieradevall, Joan & Montero, J. Ignacio, 2017. "Analysis of the technical, environmental and economic potential of phase change materials (PCM) for root zone heating in Mediterranean greenhouses," Renewable Energy, Elsevier, vol. 103(C), pages 570-581.
    2. Li, Chaoen & Yu, Hang & Song, Yuan & Zhao, Mei, 2018. "Synthesis and characterization of PEG/ZSM-5 composite phase change materials for latent heat storage," Renewable Energy, Elsevier, vol. 121(C), pages 45-52.
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    Cited by:

    1. Dai, Jiasheng & Ma, Feng & Fu, Zhen & Li, Chen & Jia, Meng & Shi, Ke & Wen, Yalu & Wang, Wentong, 2021. "Applicability assessment of stearic acid/palmitic acid binary eutectic phase change material in cooling pavement," Renewable Energy, Elsevier, vol. 175(C), pages 748-759.

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