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纤维与树脂的复合需要有一个良好的界面相,以便能将载荷从基体有效地传递给增强纤维,纤维表面改性处理是达到这一要求的主要方法。采用盐酸刻蚀法对玄武岩纤维(BF)表面进行处理,讨论了酸刻蚀对纤维单丝拉伸性能、表面硅烷偶联剂吸附量的影响以及盐酸浓度对BF/环氧树脂复合材料力学性能的影响。结果表明:纤维的单丝拉伸强度随着盐酸浓度的升高呈加速下降趋势;1mol/L盐酸处理后的纤维表面对硅烷偶联剂KH550的吸附量最大;1mol/L盐酸刻蚀后再经硅烷偶联剂KH550处理的纤维制成的BF-KH550/环氧树脂复合材料的弯曲性能、拉伸性能和层间剪切强度最优。
The combination of fiber and resin requires a good interface phase so that the load can be effectively transferred from the substrate to the reinforcing fibers. The modification of the fiber surface is the main method to achieve this requirement. The surface of basalt fiber (BF) was treated by hydrochloric acid etching. The influence of acid etching on the tensile properties of fiber monofilament, the adsorption capacity of silane coupling agent and the effect of hydrochloric acid concentration on the mechanical properties of BF / epoxy composites Impact. The results showed that the tensile strength of monofilament fiber decreased rapidly with the increase of hydrochloric acid concentration. The adsorption of silane coupling agent KH550 on the surface of 1mol / L hydrochloric acid fiber was the largest. After 1mol / L hydrochloric acid etching The flexural properties, tensile properties and interlaminar shear strength of BF-KH550 / epoxy composites made from fibers treated with silane coupling agent KH550 are the best.