Improving fracture toughness of epoxy resin composites by magnetic particles modified short glass fiber

2019 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

无线电电子学;计算机科学;材料科学

Huang, J.J.^1 ; Ma, C.G.^1^2 ; Wang, S.^1 ; Huang, T.^1 ; Chen, C.F.^1 ; Dai, P.B.^1

School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin

541004, China^1

Key Laboratory of Guangxi Information Materials, Guilin University of Electronic Technology, Guilin

541004, China^2

关键词: Epoxy resin composites;    Magnetic nano-particles;    Magnetic orientation;    Solvent-thermal method;    Solvothermal synthesis;    Toughening mechanisms;    Vibration sample magnetometers;    X ray diffractometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/563/2/022035/pdf
DOI  :  10.1088/1757-899X/563/2/022035

来源: IOP

【 摘 要 】

In this paper, magnetic nanoparticles were loaded on the surface of short glass fibers by solvent thermal method to prepare magnetic short glass fibers (MSGF) that has orientation response to a weak magnetic field (0.12T), and further MSGF/epoxy resin (EP) composites were prepared. Scanning electron microscope, X-ray diffractometer, infrared spectroscopy and vibration sample magnetometer were used to characterize the samples before and after loading magnetic nanoparticles on the surface of SCF. The effects of MSGF particle content and magnetic field on the fracture toughness of MSGF/EP composites and the toughening mechanism were investigated. The results show that γ-Fe2O3 nanoparticles surface loaded MSGF are successfully achieved using solvothermal synthesis method under the 240 °C with ferric acetylacetonate as iron source and ethanol as solvent. With the optimum MSGF content of 3wt%, when MSGF are oriented along the direction perpendicular to the crack growth under magnetic field, compared to that of pure epoxy resin, the fracture toughness Kic and Gic of the composite materials with magnetic orientation are increased by 54.4% and 138.5%, respectively, and increased by 20% and 43.9% than that of MSGF/EP composites without magnetic orientation, respectively. The main mechanisms of toughening epoxy resin by MSGF include debonding, pulling-out, bridging and deflecting crack.