Research And Development Of Graphene/epoxy Adhesives

Du to excellent mechanical properties,electrical properties,thermal properties,optical properties,graphene has been a hot research topic now.With further research graphene applications attracts widespread attention.According to the present study indicate that graphene can be applied in many fields such as field effect transistors,sensors,supercapacitors,graphene/polymer composite materials and the like.There are many graphene preparation methods such as microcomputer delamination method,vapor deposition method,epitaxial growth method,the solution peeling method,chemical oxidation-reduction method.However chemical oxidation-reduction method has the advantages of preparation process maturity,low production cost,simple preparation process,high product yield,so it is widely used.Graphene that the development process used is prepared by Hummer method.The development process take advantage of solvent extraction method prepares graphene/ethanol solution,then prepare graphene/ethanol solution and epoxy resin E-51 mixture by the methods of ultrasonic dispersion and emulsification in order to graphene can uniformly disperse in E-51.The development process use situ polymerization method to prepare graphene/epoxy resin cured.Some test results show cured materials that prepared by emulsion method have more excellent mechanical properties.When the graphene content is 0.3wt%glass transition temperature increased17?,Stretching strength increase 74%at graphene content of 2.0wt%,impact intensity when graphene content is 1.8wt%increase 8.203 KJ·m^-2,hardness increase 9.3%when graphene content is 1.8wt%.Make use of graphene/epoxy adhesive with different content graphene to bond aluminum sheets and test their shear strength.When the graphene content is 2.0wt%the shear strength achieve the maximum,compared to pure epoxy resin shear strength increase 55.6%.So Graphene can significantly improve the mechanical properties of epoxy resin adhesive.