Enhanced Electrical Conductivity and Interlaminar Fracture Toughness of CF/EP Composites via Interleaving Conductive The
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Enhanced Electrical Conductivity and Interlaminar Fracture Toughness of CF/EP Composites via Interleaving Conductive Thermoplastic Films Jialiang Liu1 · Yuntao Li1 · Dong Xiang1 · Chunxia Zhao1 · Bin Wang1 · Hui Li1 Received: 20 June 2020 / Accepted: 11 November 2020 © Springer Nature B.V. 2020
Abstract 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 asobtained 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 throughthickness (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. Keywords CF / EP composites · Interlaminar fracture toughness · Conductivity · Carbon nanotubes · Polyethersulfone
1 Introduction In recent decades, carbon fiber reinforced composites have gradually replaced the traditional metal-based materials in the aerospace industry owing to their high specific strength, superior stiffness, and good fatigue and corrosion resistance. For instance, carbon fiber
* Yuntao Li [email protected] * Dong Xiang [email protected] 1
School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
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Applied Composite Materials
reinforced composites(CFRP) are used in parts constituting the Airbus A350, Airbus A380, and Boeing 787 [1, 2]. Moreover, carbon fiber reinforced composites possess lightweight than metal-based materials, thereby saving fuel consumption and economic costs. However, the electrical conductivity remains a crucial problem in the aerospace industry. Though carbon fiber itself has good electrical conductivity, it still not good enough for use in the aerospace industry when compared to metal-based materials like aluminum and copper [3, 4]. Therefore, the development of novel conductive structures with good conductivity is highly desirable in the aerospace industry. In the last few years, numerous conductive nanoparticles have been added to matrices to b
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