ABSTRACT

The effects of carbon nanofibres (CNFs), titanium nanoparticles (Ti) and CNF–Ti fillers on the water absorption and mechanical properties of the composites were studied. The results showed that with the increase in filler mass fraction, the water absorption and mechanical properties of epoxy resin composites showed a trend of first increasing and then decreasing. When 6% CNF–Ti filler was added, the water absorption and diffusion coefficients of the composites were reduced to 2.32% and 1.04 ± 0.05 × 10⁻⁶ m²/s, and their tensile and impact strengths were improved by 200% and 124.55%, respectively, compared with the pure resin. However, when the filler was added in excess, agglomerates were generated inside the composite, which can affect the performance of the composite to a great extent. The above experimental results were verified by morphology observations via scanning electron microscopy.

摘要

研究了碳纳米纤维 (CNF)、钛纳米颗粒 (Ti) 和 CNF-Ti 填料对复合材料吸水性和机械性能的影响。结果表明，随着填料质量分数的增加，环氧树脂复合材料的吸水率和力学性能均呈现先升高后降低的趋势。添加 6% CNF–Ti 填料后，复合材料的吸水扩散系数分别降低至 2.32% 和 1.04 ± 0.05 × 10 ^-6  m ²/s，与纯树脂相比，拉伸强度和冲击强度分别提高了200%和124.55%。但是，当填料加入过量时，复合材料内部会产生团聚物，这会在很大程度上影响复合材料的性能。上述实验结果通过扫描电子显微镜的形貌观察得到了验证。