Improving interlaminar fracture toughness of carbon fiber/epoxy resin composite toughened by BN particles modified PVDF electrospinning fibrous interleaf

doi:10.19936/j.cnki.2096-8000.20240428.004

Abstract

Abstract: To address the problem of delamination damage in fiber reinforced composite laminate, an interleaving method of boron nitride (BN) particle-modified electrospun polyvinylidene fluoride (PVDF) fibrous was proposed to improve the interlaminar fracture toughness of carbon fiber/epoxy (CF/EP) composite laminate. The BN was first uniformly dispersedin PVDF solution by ultrasonic treatment, then BN-modified PVDF fibrous (BN&PVDF) was prepared using an electrospinning method and introduced into the interlayer of carbon fibres as an intercalation material, and BN&PVDF reinforced CF/EP composite laminates (BN&PVDF-CF/EP) were prepared by manual lay-up method and vacuum hot-pressing process. The study focused on the effect of BN particle content in modified PVDF electrospun fibrous on the reinforcement of CF/EP interlaminar fracture toughness and the relevant interlaminar toughening mechanism. The results show that the modified PVDF electrospun fibrous with a BN content of 3.2wt% have achieved the best toughening effect. The mode Ⅰ and Ⅱ interlaminar fracture toughness of BN&PVDF-CF/EP are increased by 129.6% and 160.6%, respectively, compared to that of CF/EP. The introduction of the BN particles increases the tensile strength and modulus of the PVDF fibers. The BN particles areembedded in the PVDF fibers and increase the roughness of the PVDF surface, which enhances the interfacial interaction between the PVDF fibers and the matrix, inducing a more complex toughening behavior and improving the toughening effect of the PVDF fibers.

Key words: carbon fiber reinforced composites, interlaminar fracture toughness, boron nitride particles, polyvinylidene fluoride, electrospun fibers

CLC Number:

TB332

ZENG Tangyu, MA Chuanguo, XIANG Yang, SHAO Shilei. Improving interlaminar fracture toughness of carbon fiber/epoxy resin composite toughened by BN particles modified PVDF electrospinning fibrous interleaf[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(4): 26-32.

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