Improving fiber/matrix interfacial strength through graphene and graphene-oxide nano platelets

37th Risø International Symposium on Materials Science

Pegoretti, A.^1 ; Mahmood, H.^1 ; Pedrazzoli, D.^2 ; Kalaitzidou, K.^3,4

Department of Industrial Engineering, University of Trento, via Sommarive 9, Trento

I38123, Italy^1

Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland

OH

44106-7202, United States^2

G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta

GA

30336, United States^3

School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta

GA

30322, United States^4

关键词: Fiber/matrix interface;    Glass fiber reinforced composite;    Interfacial shear strength;    Interfacial strength;    Micromechanical tests;    Polypropylene based composites;    Single fiber composite;    Structural composites;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/139/1/012004/pdf
DOI  :  10.1088/1757-899X/139/1/012004

来源: IOP

【 摘 要 】

Fiber/matrix interfacial shear strength (ISS) is a key factor determining the mechanical properties of structural composites. In this manuscript the positive effects of both graphene and graphene oxide in improving the ISS value of glass-fiber reinforced composites are experimentally demostrated. Two strategies will be presented: i) uniform dispersion of the nanofillers in the polymer matrix or ii) selective deposition of the nanofillers at the fiber/matrix interface. Both thermoplastic (polypropylene) and thermosetting (epoxy) matrices are investigated and the effects of nanoparticles on the fiber/matrix interface are determined through micromechanical tests on single-fiber composites. Finally, the beneficial effects of the investigated nanofillers on both mechanical and functional (strain monitoring) properties of multiscale macrocomposites are experimentally proved for the cases of polypropylene-based composites reinforced with short glass fibers and on epoxy-based composites reinforced with continuous unidirectional glass fibers.