中文摘要：

采用硅烷偶联剂KH550改性前后的微/纳米二氧化硅（SiO2）颗粒对丙烯酸树脂进行改性,采用傅里叶红外光谱仪（FT-IR）对树脂固化结果进行表征;用线性涂布器在铸铁表面制成微/纳米SiO2-丙烯酸树脂复合涂层,采用摩擦试验机R-tec、表面轮廓仪和扫描电子显微镜分别测试涂层的摩擦因数、磨损率和磨痕形貌。结果表明：改性后SiO2对于涂层性能的增强均优于未改性SiO2,改性纳米SiO2提高涂层在干燥条件下的摩擦磨损性能,但对其在海水存在条件下的摩擦性能没有明显的影响;改性微米SiO2提高涂层的抗磨损性,但对摩擦因数影响不大;改性微纳米SiO2协同改性的涂层,在干燥条件下具有良好的摩擦磨损性能,但在海水存在条件下的摩擦磨损性能不如单组份SiO2改性丙烯酸树脂涂层。

英文摘要：

Acrylic resin was reinforced with micro/nano SiO2 particles before and after being chemically modified by KH550.The chemical compositions of the resin before and after being cured were characterized with an intelligent Fourier transform infrared spectroscopy（FT-IR） .Various kinds of Acrylic resin-SiO2 composite coatings were prepared on east iron surface with a bar eoater.Friction coefficient, wear rate and wear morphologies of the coatings were evaluated with R-tec tri- bology tester, surface profiler and SEM, respectively.The results show that the modified SiO2 particles can remarkably en- hance the tribologieal performance of the coating better than unmodified SiO2.Modified nano SiO2 particles can improve the wear resistance of acrylic resin in dry condition, but less effect in sea water. Modified micro SiO2 particles can improve the anti-wear performances of the composite coatings but show no obvious influence on their friction coefficients. The hybrid coatings containing both of modified mirco SiO2 and nano SiO2 particles display better anti-wear ability in dry condition, but worse than that the coating containing only single SiO2 particles in sea water.