With wearable smart textiles playing an increasingly important role in people’s life, aramid fiber (AF) stands out among high-performance materials due to its outstanding flexibility, high strength, and impact resistance. However, its excellent insulation makes it unable to sense and respond to external stimuli, which seems to be a call to multiwalled carbon nanotubes (MWCNTs) with high conductivity. In this paper, the effect of MWCNTs in enhancing the electrical properties and interfacial strength of aramid fiber reinforced polymer (AFRP) composites was researched. Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) proved that the polydopamine (PDA) layer and MWCNTs were successfully grafted onto the surface of the AF. Scanning electron microscopy (SEM) showed that the distribution of MWCNTs on the fiber surface is quite uniform and dense. As a result, the adhesion of PDA is more conducive to the deposition of MWCNTs, compared with the pristine aramid fiber. The modified fiber AF-PDA-MWCNTs obtained a resistance on the order of 10⁴ MΩ without reducing its mechanical properties (the tensile strength has obtained an increase of 10.59%). The composite material may also have good interface properties, with the interlaminar fracture toughness G_I increased by 200.99%. After being endowed with electrical properties, aramid fibers have strong potential in wearable textiles due to their flexibility, high sensitivity to various deformations, and excellent safety protection performance.

随着可穿戴智能纺织品在人们生活中扮演着越来越重要的角色，芳纶纤维（AF）由于其出色的柔韧性，高强度和抗冲击性而在高性能材料中脱颖而出。但是，其出色的绝缘性使其无法感知和响应外部刺激，这似乎是对具有高电导率的多壁碳纳米管（MWCNT）的呼唤。本文研究了多壁碳纳米管在增强芳纶纤维增强聚合物（AFRP）复合材料的电性能和界面强度方面的作用。傅里叶变换红外（FT-IR）和X射线光电子能谱（XPS）证明聚多巴胺（PDA）层和MWCNTs已成功接枝到AF的表面上。扫描电子显微镜（SEM）显示，MWCNT在纤维表面上的分布是相当均匀和致密的。结果，与原始芳族聚酰胺纤维相比，PDA的粘附更有利于MWCNT的沉积。改性纤维AF-PDA-MWCNT的电阻约为10⁴ MΩ而不降低其机械特性（拉伸强度已获得的10.59％的增加）。该复合材料还可以具有良好的界面性质，其中层间断裂韧性G _I增加了200.99％。芳族聚酰胺纤维具有电性能后，由于其柔韧性，对各种变形的高度敏感性以及出色的安全防护性能，在可穿戴纺织品中具有强大的潜力。