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<p>To improve the self-regulating temperature of asphalt and mitigate the temperature diseases of asphalt pavement, polyethylene glycol (PEG) and surface organic layered double hydroxides (OLDHs) were functionally designed and prepared for asphalt modification. The result of Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) showed that PEG modified OLDHs phase-change composite (PEG@OLDHs) has been successfully synthesized. Compared with PEG, PEG@OLDHs exhibited superior shape stabilization and smaller supercooling degree, which indicated that OLDHs contributed to enhancing the shaping effect and the thermal storage capacity of PEG at high temperature. PEG had a negative influence on physical and rheological properties of asphalt, especially at high temperature. The adverse impact of PEG on the performance of asphalt was notably inhibited after compounding with OLDHs, and PEG@OLDHs modified asphalt (PLMB) showed superior performance than PEG modified asphalt (PMB). PEG could mitigate temperature variation of asphalt during heating and cooling processes, and PMB possessed autonomous temperature regulation. Unfortunately, the temperature regulation of PMB was substantially deteriorated after thermal cycles. PLMB exhibited better temperature regulation than PMB, and the maximum temperature regulation during heating and cooling processes was 7.8&#xa0;°C and − 4.0&#xa0;°C, respectively. Furthermore, PLMB still maintained outstanding temperature control performance after thermal cycles, and the corresponding maximum temperature regulation was 6.7&#xa0;°C and − 3.6&#xa0;°C. OLDHs modification could significantly promote the temperature regulation and thermal stability of PEG, contributing to the full exertion and long-term effect of PEG on the temperature adaptability of asphalt.</p>

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Synthesis of polyethylene glycol surface-grafted layered double hydroxides and application in improving thermal regulation and durability of asphalt

  • 期刊论文

  • 发表日期：

    2026年3月24日

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  • Canlin Zhang,
  • Liyang Song,
  • Ting Wang,
  • Chuxin Lin,
  • Yan Yuan,
  • Bin Xue,
  • Zenghua Sun,
  • Shiyao Shao,
  • Peng Xia

摘要

To improve the self-regulating temperature of asphalt and mitigate the temperature diseases of asphalt pavement, polyethylene glycol (PEG) and surface organic layered double hydroxides (OLDHs) were functionally designed and prepared for asphalt modification. The result of Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) showed that PEG modified OLDHs phase-change composite (PEG@OLDHs) has been successfully synthesized. Compared with PEG, PEG@OLDHs exhibited superior shape stabilization and smaller supercooling degree, which indicated that OLDHs contributed to enhancing the shaping effect and the thermal storage capacity of PEG at high temperature. PEG had a negative influence on physical and rheological properties of asphalt, especially at high temperature. The adverse impact of PEG on the performance of asphalt was notably inhibited after compounding with OLDHs, and PEG@OLDHs modified asphalt (PLMB) showed superior performance than PEG modified asphalt (PMB). PEG could mitigate temperature variation of asphalt during heating and cooling processes, and PMB possessed autonomous temperature regulation. Unfortunately, the temperature regulation of PMB was substantially deteriorated after thermal cycles. PLMB exhibited better temperature regulation than PMB, and the maximum temperature regulation during heating and cooling processes was 7.8 °C and − 4.0 °C, respectively. Furthermore, PLMB still maintained outstanding temperature control performance after thermal cycles, and the corresponding maximum temperature regulation was 6.7 °C and − 3.6 °C. OLDHs modification could significantly promote the temperature regulation and thermal stability of PEG, contributing to the full exertion and long-term effect of PEG on the temperature adaptability of asphalt.