The carbon nanotubes/carbon fiber/poly (ether ether ketone) (CNTs/CF/PEEK) multiscale composites with excellent properties were prepared by introducing treated CNTs (t-CNTs) into CF/PEEK composites using prepreg spraying method. The effect of t-CNTs content on the mechanical performance of composites such as interlaminar shear strength (ILSS), flexural strength and flexural modulus were investigated. The results indicated that the ILSS, flexural strength and flexural modulus of CNTs/CF/PEEK composites were increased by 35.8%, 25.4% and 23.7% after 0.5 wt% t-CNTs introducing. The surface of prepregs and cross-section of the composites displayed evenly t-CNTs dispersion and strong fiber-resin adhesion by scanning electron microscope observation. With the addition of t-CNTs, the electrical conductivity and thermal conductivity of CNTs/CF/PEEK composites were also markedly improved, in comparison with that of CF/PEEK composites. This suggested that the prepreg spraying method was an effective approach to coat t-CNTs on CF/PEEK prepregs and enhance the performance of CNTs/CF/PEEK composites.

将碳纳米管/碳纤维/聚醚醚酮（CNTs / CF / PEEK）多尺度复合材料通过预浸料喷涂法将处理后的碳纳米管（t-CNTs）引入CF / PEEK复合材料中，制备出性能优异的碳纳米管/碳纤维/聚醚醚酮（CNTs / CF / PEEK）多尺度复合材料。研究了t-CNTs含量对复合材料力学性能的影响，如层间剪切强度（ILSS），弯曲强度和弯曲模量。结果表明，引入0.5wt％的t-CNT后，CNTs / CF / PEEK复合材料的ILSS，弯曲强度和弯曲模量分别增加了35.8％，25.4％和23.7％。通过扫描电子显微镜观察，预浸料的表面和复合材料的横截面显示出均匀的t-CNT分散和强的纤维-树脂粘合性。随着t-CNT的加入，与CF / PEEK复合材料相比，CNTs / CF / PEEK复合材料的电导率和导热率也得到了显着提高。这表明预浸料喷涂方法是一种在CF / PEEK预浸料上涂覆t-CNT并增强CNT / CF / PEEK复合材料性能的有效方法。