Study On Preparation And Properties Of MoO₃/Nano-Carbon Material Reinforced Glass Fiber Composites

Fiber reinforced resin matrix composites are becoming a viable substitute for metal-based polymers in many common and advanced engineering applications.Due to its ease of manufacture,good choice of thermoplastics and thermosetting materials and economic feasibility,fiber reinforced resin matrix composites have been widely used in the fields of automobile lightweight,aerospace,wind turbine blades and sports equipment.In this paper,glass fiber reinforced epoxy resin composites?GF/EP?were chosen as the research object.The preparation process and tribological properties of EP/GF composites were studied using MoO₃ nanoribbons/oxidized multi-walled carbon nanotubes?MoO₃-CNTs?and MoO₃ nanoribbons/graphene oxide?MoO₃-GO?as nano-modified materials.The main results of this paper are as follows:1.MoO₃-CNTs and MoO₃-GO nanocomposites were prepared by hydrothermal method.MoO3/nano carbon filled glass fiber reinforced epoxy resin matrix composites were prepared by vacuum assisted resin transfer moulding?VARTM?.The friction and wear properties of the composites were studied.Compared with GF/EP composites,MoO₃-GO/GF/EP composites and MoO₃-CNTs/GF/EP composites exhibit better friction and wear resistance,i.e.under the same wear conditions,the COF and wear rate of MoO₃-GO/GF/EP composites are lower than those of GF/EP composites.2.Uniform MoO₃-CNTs?f-MoO₃-CNTs?and MoO₃-GO?f-MoO₃-GO?films were prepared by improved vacuum filtration technology.MoO₃/nano-carbon film modified GF/EP composites were prepared by vacuum assisted resin transfer moulding?VARTM?.On this basis,the friction and wear properties of f-MoO₃-CNTs modified GF/EP composites and f-MoO₃-GO modified GF/EP composites were systematically studied.The results show that a high quality transfer film is formed between the wear couples during the wear resistance of f-MoO₃-carbon nano-materials/GF/EP composites.This film acts as an intermediate in the friction process,resulting in the"polymer-polymer"contact between the interface of friction pairs,thus effectively avoiding the occurrence of"steel-polymer"wear.Therefore,the tribological properties of f-MoO₃-carbon-based nanomaterials/GF/EP composites are obviously better than those of MoO₃-carbon-based nanomaterials/GF/EP composites and GF/EP composites.3.In addition to characterizing the tribological properties of GF/EP,MoO₃-CNTs/GF/EP and f-MoO₃-GO/GF/EP composites,the electrical properties of these composites were compared.The conductivity of f-MoO₃-carbon nano-materials/GF/EP composites is one order of magnitude higher than that of MoO₃-carbon nano-materials/GF/EP composites because of the good conductive network in the structure of f-MoO₃-carbon nano-materials/GF/EP composites.