纳米SiO_(2)改性水性EP涂料的制备及耐磨性能研究

Preparation of Waterborne Epoxy Resin Coating Modified by Nano-SiO_(2) and Its Wear Resistance

目的制备纳米SiO_(2)改性水性环氧树脂涂料,并对其耐磨性能进行研究。方法在水性环氧树脂涂料的基础上添加质量分数为1%、2%、3%、4%、5%的纳米SiO_(2)对涂料进行改性,将一部分制得的纳米SiO_(2)改性水性环氧树脂涂料涂在处理好的马口铁片上,其余部分则浇筑在自制的哑铃型模具中,制备出两种不同的试样,用来进行红外光谱表征、SEM、涂层力学性能测试、涂层耐磨性测试、涂层吸水性测试以及涂料黏度测试。结果当纳米SiO_(2)质量分数为2%时,涂层硬度达到6 H,附着力等级为0,耐冲击高度达50 cm,拉伸强度为43.27 MPa,磨耗质量为0.0002g,摩擦系数为0.0375,涂料适用期为40 min,涂层抗弯曲性、吸水性良好。结论改性后涂层的吸水性下降,力学性能、耐磨性显著提高,纳米SiO_(2)的分散性良好,未发生团聚现象。

Waterborne epoxy resin coating modified by nano SiO_(2) is prepared,and its wear resistance is studied.Nano-SiO_(2) with mass fraction of 1%,2%,3%,4%and 5%was added in waterborne epoxy resin coating to modify the coating.Two different samples were prepared by part of the prepared coating coated on the processed tinplate,and the rest poured in a self-made dumbbell-shaped mold.The two kinds samples used for infrared spectrum characterization,SEM,coating mechanical properties test,coating wear resistance test,coating water absorption test and coating viscosity test.When the mass fraction of nano-SiO_(2) is 2%,the hardness of the coating reaches 6H,the adhesion grade is 0,the impact resistance height is 50cm,the tensile strength is 43.27 MPa,the wear mass is 0.0002 g,the friction coefficient is 0.0375,and the coating life is 40min and has good bending resistance and water absorption.After modification,the water absorption of the coating decreased,and the mechanical properties and wear resistance were significantly improved.The nano-SiO_(2) had good dispersibility and no agglomeration occurred.