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<p>Basalt fiber (BF) reinforced polymer composites (BFRPs) hold significant potential for aerospace, petrochemical and civil engineering applications. However, their wider application is hindered by weak interfacial bonding and the difficultyof detecting internal cracks. This study proposes a facile strategy combining electrophoretic deposition (EPD) and thermal reduction to construct wrinkled reduced graphene oxide (rGO) coating on BF surfaces. The modified functional interface enhances both mechanical properties and electrical conductivity. Mechanical characterization reveals substantial improvements in rGO-modified BFRP: flexural modulus and tensile modulus increase by 52% and 105%, respectively. Compared with the original BFs, the surface roughness (Ra) of BF after treatment rises from 38.2&#xa0;nm to 182.9&#xa0;nm, while the maximum interface thickness increased from 99&#xa0;nm to 384&#xa0;nm (increased by 288%). Finite element analysis (FEA) indicates that this thickened interface reduces maximum interfacial stress by 51.8%. Remarkably, the modified BFRP using solution with GO content of 0.1% exhibits excellent damage self-sensing capabilities under multiple loads, demonstrating gauge factors (GF) of 102.5 under tensile loading, 176.4 under compressive loading, and 59.7 under flexural loading conditions. It also enables early crack detection at 0.8% strain during cyclic flexural loading, surpassing conventional monitoring thresholds. This work provides an efficient and scalable approach to address interfacial and damage monitoring challenges in BFRP composites, promoting their application in smart structural health monitoring systems.</p>

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Basalt fiber reinforced epoxy composites with a micro-wrinkled interface constructed by reduced graphene oxide for mechanical enhancement and damage self-sensing

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月11日

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  • Dong Xiang,
  • Haoming Sun,
  • Libing Liu,
  • Kunming Ye,
  • Peiyong Wang,
  • Wei Tan,
  • Haoran Huang,
  • Jinbo Cheng,
  • Li Wang,
  • Yuanpeng Wu

摘要

Basalt fiber (BF) reinforced polymer composites (BFRPs) hold significant potential for aerospace, petrochemical and civil engineering applications. However, their wider application is hindered by weak interfacial bonding and the difficultyof detecting internal cracks. This study proposes a facile strategy combining electrophoretic deposition (EPD) and thermal reduction to construct wrinkled reduced graphene oxide (rGO) coating on BF surfaces. The modified functional interface enhances both mechanical properties and electrical conductivity. Mechanical characterization reveals substantial improvements in rGO-modified BFRP: flexural modulus and tensile modulus increase by 52% and 105%, respectively. Compared with the original BFs, the surface roughness (Ra) of BF after treatment rises from 38.2 nm to 182.9 nm, while the maximum interface thickness increased from 99 nm to 384 nm (increased by 288%). Finite element analysis (FEA) indicates that this thickened interface reduces maximum interfacial stress by 51.8%. Remarkably, the modified BFRP using solution with GO content of 0.1% exhibits excellent damage self-sensing capabilities under multiple loads, demonstrating gauge factors (GF) of 102.5 under tensile loading, 176.4 under compressive loading, and 59.7 under flexural loading conditions. It also enables early crack detection at 0.8% strain during cyclic flexural loading, surpassing conventional monitoring thresholds. This work provides an efficient and scalable approach to address interfacial and damage monitoring challenges in BFRP composites, promoting their application in smart structural health monitoring systems.