The poor electrical conductivity and interlaminar fracture toughness of carbon fiber reinforced epoxy (CF/EP) composites could reduce their reliability for aerospace applications. In this work, multi-walled carbon nanotubes (MWCNTs) doped polyethersulfone (PES) conductive thermoplastic films (CTFs) were prepared by solution casting method. The as-obtained composites were then interleaved into CF/EP prepregs to yield composite laminates. The effects of CTFs on the electrical conductivity and interlaminar fracture toughness of the as-prepared CF/EP composites were investigated. The results suggested an increase in conductivity of laminates by 104% and 84% in the transverse (Y) and through-thickness (Z) directions, respectively. The Mode I and Mode II interlaminar fracture toughness values were evaluated by double cantilever beam (DCB) and end-notched flexure (ENF) testing. The data revealed that the introduction of CTFs with 10wt% MWCNTs led to enhancement in Mode I and Mode II interlaminar fracture toughness of Composite laminates by 206% and 47%, respectively. The failure mechanism was investigated through microstructural and morphological changes in the composites studied by scanning electron microscopy (SEM). This work provides valuable guidance for the simultaneous enhancement of electrical conductivity and interlaminar fracture toughness of CF/EP composites.

碳纤维增强环氧树脂（CF / EP）复合材料的不良电导率和层间断裂韧性可能会降低其在航空航天应用中的可靠性。在这项工作中，通过溶液流延法制备了掺杂多壁碳纳米管（MWCNTs）的聚醚砜（PES）导电热塑性薄膜（CTF）。然后将所获得的复合材料插入CF / EP预浸料中，制成复合材料层压板。研究了CTFs对所制备CF / EP复合材料的电导率和层间断裂韧性的影响。结果表明，在横向（Y）和厚度方向（Z）方向上，层压板的电导率分别提高了104％和84％。通过双悬臂梁（DCB）和端切口挠曲（ENF）测试评估了I型和II型层间断裂韧性值。数据显示，引入含有10wt％MWCNT的CTF可使复合材料层压板的I型和II型层间断裂韧性分别提高206％和47％。通过扫描电子显微镜（SEM）研究复合材料的微观结构和形态变化，研究其破坏机理。这项工作为同时提高CF / EP复合材料的电导率和层间断裂韧性提供了有价值的指导。分别。通过扫描电子显微镜（SEM）研究复合材料的微观结构和形态变化，研究其破坏机理。这项工作为同时提高CF / EP复合材料的电导率和层间断裂韧性提供了有价值的指导。分别。通过扫描电子显微镜（SEM）研究复合材料的微观结构和形态变化，研究其破坏机理。这项工作为同时提高CF / EP复合材料的电导率和层间断裂韧性提供了有价值的指导。