Green synthesis of polyurethane with reversible oxime-urethane bond to enhance the self-healing properties of asphalt binder at room temperature

Gong, Xing; Liu, Quantao; Huang, Wenwei; Wang, Jiazhu; Cao, Zhilong; Wu, Shaopeng

doi:10.1016/j.conbuildmat.2023.134766

Construction and Building Materials

2024

DOI: 10.1016/j.conbuildmat.2023.134766

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Green synthesis of polyurethane with reversible oxime-urethane bond to enhance the self-healing properties of asphalt binder at room temperature

Xing Gong,

Quantao Liu,

Wenwei Huang

et al.

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Cited by 6 publications

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Polydopamine‐modified black phosphorus/microcapsule composite material used to enhance the solar thermal conversion and self‐healing performance of SBS modified asphalt

Ren,

Jiang,

Fan

et al. 2024

J of Applied Polymer Sci

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This study developed UV‐responsive microcapsules to enhance the self‐healing properties of asphalt, addressing the limitations of low survival rates and single‐release mechanisms in current encapsulated rejuvenators. The microcapsules, featuring a urea‐formaldehyde shell embedded with polydopamine‐coated black phosphorus nanosheets (BP/DA) and microalgae bio‐oil as the core, can convert solar energy into thermal energy, promoting proactive self‐healing in asphalt materials. BP/DA expands the microcapsules' light absorption range, enhancing their photothermal conversion efficiency. When incorporated into styrene‐butadiene‐styrene (SBS)‐modified asphalt at a 1.5% dosage, the microcapsules (BP/DA/MC) improved the mechanical properties: ductility increased by 13.7%, softening point rose by 2%, and penetration decreased by 3.3%. The storage modulus (G′) at 46 and 64°C increased by 35.9% and 24.3%, respectively, compared to SBS asphalt. Additionally, the ductility self‐healing rate of BP/DA/MC/SBS asphalt improved by 209.7%, with a healing index (HI) of 78.16%. The microcapsules also demonstrated excellent photothermal conversion, increasing the asphalt's temperature by 22.6% under identical lighting conditions. This research offers a new method for developing intelligent self‐healing asphalt with multi‐mechanism activation, providing theoretical support for future third‐generation microcapsule‐based asphalt with remote‐controlled release and activation response.

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Polydopamine‐modified black phosphorus/microcapsule composite material used to enhance the solar thermal conversion and self‐healing performance of SBS modified asphalt

Ren,

Jiang,

Fan

et al. 2024

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

Dynamic polymers based on oxime-urethane chemistry: design, performances, and applications

Zhang,

Zhou,

Xiong

et al. 2024

Sci. China Chem.

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Self-healing microcapsule properties improvement technology: Key challenges and solutions for application in asphalt materials

Xu,

Yuan,

Cong

et al. 2024

Construction and Building Materials

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Green synthesis of polyurethane with reversible oxime-urethane bond to enhance the self-healing properties of asphalt binder at room temperature

Cited by 6 publications

References 45 publications

Polydopamine‐modified black phosphorus/microcapsule composite material used to enhance the solar thermal conversion and self‐healing performance of SBS modified asphalt

Polydopamine‐modified black phosphorus/microcapsule composite material used to enhance the solar thermal conversion and self‐healing performance of SBS modified asphalt

Dynamic polymers based on oxime-urethane chemistry: design, performances, and applications

Self-healing microcapsule properties improvement technology: Key challenges and solutions for application in asphalt materials

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