Scholarlink

<p>Cracking is a common distress in asphalt pavement due to repeated traffic loads and ambient environmental changes especially in cold regions. Although asphalt is a temperature-sensitive material with intrinsic self-healing properties, its effectiveness in crack repair is often severely compromised by external constraints. Corn straw, a widely available agricultural residue rich in phenolic compounds and polysaccharide, has garnered much attention in the field of biomass material. To achieve the valorization of corn straw in pavement engineering and enhance asphalt’s self-healing capability, the cellulose extracted from corn straw was functionalized with dynamic reversible boronic ester bonds, and the corresponding modified asphalt (B-CA) was subsequently prepared. The chemical structure, stability, and morphology of the boronic-ester-modified cellulose (BE-CSC) were characterized by Fourier-transform infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and scanning electron microscopy. The mechanical performance, fatigue resistance, and healing capacity of the B-CA were evaluated through physical tests, analysis of fracture-healing strain behavior, the viscoelastic continuum damage (VECD) model, self-healing master curve, and repeated fatigue-recovery tests under various conditions. Results show that phenylboronic acid esterifies with cellulose to form reversible boronic ester bonds. The functionalized BE-CSC exhibits stable bonding states, enabling B-CA to develop a robust network structure. Compared to base asphalt (BA), B-CA shows 90% higher cracking resistance and a fivefold improvement in fatigue resistance. The dynamic bonds enable interfacial reconfiguration, increasing the healing index (HI) by over 80% and the short-term healing more than 50%. Furthermore, healing efficiency (HE<sub>F</sub>) and recovery ratio (R) improve by over 30% under repeated fatigue cycles. These enhancements strength with high temperature, longer healing time, and accumulated fatigue cycles, confirming that reversible boronic ester bonds effectively enhance asphalt self-healing performance.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Boronic ester-crosslinked cellulose as a sustainable biomaterial for high-efficiency self-healing asphalt

  • 期刊论文

  • 发表日期：

    2026年7月6日

查看全文
  • Yiming Li,
  • Rui Ma,
  • Guoqiang Sun,
  • Aoting Cheng,
  • Qichao Gao,
  • Xiaoming Huang,
  • Peifeng Cheng

摘要

Cracking is a common distress in asphalt pavement due to repeated traffic loads and ambient environmental changes especially in cold regions. Although asphalt is a temperature-sensitive material with intrinsic self-healing properties, its effectiveness in crack repair is often severely compromised by external constraints. Corn straw, a widely available agricultural residue rich in phenolic compounds and polysaccharide, has garnered much attention in the field of biomass material. To achieve the valorization of corn straw in pavement engineering and enhance asphalt’s self-healing capability, the cellulose extracted from corn straw was functionalized with dynamic reversible boronic ester bonds, and the corresponding modified asphalt (B-CA) was subsequently prepared. The chemical structure, stability, and morphology of the boronic-ester-modified cellulose (BE-CSC) were characterized by Fourier-transform infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and scanning electron microscopy. The mechanical performance, fatigue resistance, and healing capacity of the B-CA were evaluated through physical tests, analysis of fracture-healing strain behavior, the viscoelastic continuum damage (VECD) model, self-healing master curve, and repeated fatigue-recovery tests under various conditions. Results show that phenylboronic acid esterifies with cellulose to form reversible boronic ester bonds. The functionalized BE-CSC exhibits stable bonding states, enabling B-CA to develop a robust network structure. Compared to base asphalt (BA), B-CA shows 90% higher cracking resistance and a fivefold improvement in fatigue resistance. The dynamic bonds enable interfacial reconfiguration, increasing the healing index (HI) by over 80% and the short-term healing more than 50%. Furthermore, healing efficiency (HEF) and recovery ratio (R) improve by over 30% under repeated fatigue cycles. These enhancements strength with high temperature, longer healing time, and accumulated fatigue cycles, confirming that reversible boronic ester bonds effectively enhance asphalt self-healing performance.