石墨烯改性苯丙-环氧防护涂层性能研究

Performance of graphene modified styrene propylene-epoxy protective coating

以水性环氧乳液、高岭土、自制转锈剂、氧化石墨烯分散液为苯丙乳液的改性材料,采用物理共混法制备石墨烯改性苯丙-环氧乳液防护涂层,探讨了苯丙-环氧乳液配比、高岭土、转锈剂及氧化石墨烯分散液掺量对涂层粘结强度的影响,并考察了涂层拉伸性能及基本性能。结果表明,涂层粘结强度随水性环氧乳液质量比例增大逐渐提高,随高岭土、转锈剂、石墨烯分散液掺量的增加呈先增大后减小的趋势;当m苯丙∶m环氧=1∶2,高岭土、转锈剂、氧化石墨烯分散液掺量分别为10%,3%,0.2%时,涂层各项基本性能良好,且涂层电阻率远大于普通金属材料,防护效果优异。

The graphene-modified styrene-acrylic-epoxy emulsion protective coating was prepared by physical blending method with waterborne epoxy emulsion,Kaolin,self-made rust transfer agent and graphene oxide dispersion as the modified materials of styrene-acrylic emulsion.The effects of styrene-acrylic-epoxy emulsion ratio and content of Kaolin,rust transfer agent and graphene oxide dispersion on the bonding strength of the coating were discussed,and the tensile properties and basic properties of the coating were investigated.The results show that the bond strength of the coating increases with the increase of the mass ratio of waterborne epoxy emulsion and increases first and then decreases with the increase of the content of Kaolin,rust transfer agent and graphene dispersion.When m phenyl acrylic∶m epoxy=1∶2 and content of Kaolin,rust transfer,graphene oxide dispersion is 10%,3%,0.2%,respectively,coating basic performance is good,and the coating resistivity is much larger than ordinary metal materials,excellent protective effect.