Mechanical and drilling properties of graphene oxide modified urea-melamine-phenol formaldehyde composites reinforced by glass fiber

摘要

Graphene oxide (GO) modified urea-melamine-phenol formaldehyde resin was reinforced by R-glass fiber woven (RFW-GO/UMPF). The influence of GO content on the tensile, flexural, and drilling properties was investigated. Polytetrafluoroethylene (PTFE) coatings was applied onto individual glass fibers to evaluate the reinforcement mechanism of GO sheets on the tensile and flexural properties of RFW-GO/UMPF composites laminates. Compared to the R-glass fiber woven reinforced urea-melamine-phenol formaldehyde resin (RFW-UMPF), the tensile strength and modulus of RFW-GO/UMPF with 0.6 wt% GO contents increased by 28.1% and 200.3%, respectively. The flexural strength and modulus of RFW-GO/UMPF with 0.4 wt% GO loadings improved to 51.8 MPa and 716.7 MPa, respectively. Moreover, when the content of GO increased from 0 wt% to 0.8 wt%, the delamination factor of RFW-GO/UMPF decreased by 0.2. Morphology analysis of failure surface was systematically revealed by SEM.