镀镍碳纤维改性水泥基材料的力学性能及耐久性研究

doi:10.19936/j.cnki.2096-8000.20260328.008

摘要/Abstract

摘要： 碳纤维表面光滑且呈惰性,与水泥基材料的相容性较差,化学镀镍处理可改善其表面性能。通过表征镀镍碳纤维的表面元素和拉伸强度,制备了镀镍碳纤维改性水泥基材料,研究了其力学性能、抗裂抗渗性和抗冻性,并与碳纤维改性水泥基材料进行了对比。结合SEM,分析了镀镍碳纤维/水泥基材料界面改性机理。结果表明:与碳纤维相比,镀镍碳纤维表面氧元素含量和拉伸强度均有所增大;对水泥基材料力学性能和耐久性的提高效果与在水泥基材料中的分散性均更优,其最佳掺量为0.9%。在此掺量下,水泥基材料的抗折和抗压强度分别增大了32.88%、26.61%,开裂总权值、渗水高度、质量损失率、抗折强度损失率和抗压强度损失率分别减小了34.76%、53.19%、57.41%、51.29%、45.42%。碳纤维/水泥基材料界面存在较大孔隙,而镀镍碳纤维/水泥基材料界面结合良好。镀镍碳纤维表面的氧元素提高了其亲水性,镍镀层提高了其与水泥基材料的机械咬合力。

关键词: 水泥基材料, 镀镍碳纤维, 力学性能, 抗裂抗渗性, 抗冻性

Abstract: The surface of carbon fiber is smooth and it is inert, which results in poor compatibility with cement-based material. The surface properties of carbon fiber can be improved by electroless nickel plating. The surface elements and tensile strength of nickel-plated carbon fiber were characterized, and the nickel-plated carbon fiber modified cement-based material were prepared. Meanwhile, the mechanical properties, crack resistance, impermeability and frost resistance of nickel-plated carbon fiber modified cement-based materials were studied and compared with carbon fiber modified cement-based materials. The interfacial modification mechanism of nickel-plated carbon fiber/cement based material was analyzed by SEM. The results show that, compared with carbon fiber, nickel-plated carbon fiber exhibits higher surface oxygen content and greater tensile strength; it provides better improvement in the mechanical properties and durability of cement-based materials as well as superior dispersion in the matix, with an optimal content of 0.9%. With this fiber content, the flexural strength and compressive strength of the cement-based materials increase by 32.88% and 26.61%, respectively, while the total cracking weight, water seepage height, mass loss rate, flexural strength loss rate, and compressive strength loss rate decrease by 34.76%, 53.19%, 57.41%, 51.29%, and 45.42%, respectively. Numerous pores are observed at the interface of carbon fiber/cement-based material, but the interface of nickel-plated carbon fiber/cement-based material is well bonded. The oxygen element on the surface of nickel-plated carbon fiber improves its hydrophilicity, and the nickel coating enhances its mechanical interlocking force with cement-based material.

Key words: cement-based materials, nickel-plated carbon fiber, mechanical properties, crack resistance and impermeability, frost resistance

中图分类号:

TB332

刘丽, 杨旭. 镀镍碳纤维改性水泥基材料的力学性能及耐久性研究[J]. 复合材料科学与工程, 2026, 0(3): 65-71.

LIU Li, YANG Xu. Study on mechanical properties and durability of nickel-plated carbon fiber modified cement-based material[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(3): 65-71.

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