以TiO₂为核体，通过共沉淀法制备Sb-SnO₂/TiO₂（SST）导电复合材料，并采用甲基苯基二甲氧基硅烷（MPD）对其进行表面改性。利用XRD、SEM、TEM、FT-IR、水接触角和TG等技术对导电材料进行表征。结果表明，MPD的合适用量为3%且以化学键形式结合于SST表面，其包覆层厚度为3~5 nm。将改性Sb-SnO₂/TiO₂（MSST）复合材料加到丙烯酸树脂中制备导电涂料，并将其涂覆在ABS基板上固化后得导电涂层。结果表明，MSST导电涂层的表面电阻小于SST导电涂层，添加量为18%时效果较佳。通过流变仪测定导电涂料的流变性能，结果表明，与SST相比，MSST大幅提高了丙烯酸导电涂料的分散性、储存稳定性和机械性能。

Sb-SnO₂/TiO₂ (SST) conductive composites are prepared through a co-precipitation method using TiO₂ as the carrier,and the obtained SST is modified by methylphenyldimethoxysilane (MPD).The modified SST conductive composites (MSSTs) are characterized by means of XRD,SEM,TEM,FT-IR,water contact angle and TG techniques.It is found that the appropriate addition amount of MPD is about 3%.MPD organic layer with a thickness of 3-5 nm exists in the form of chemical bonds on the surface of MSST.Conductive coatings are prepared through adding MSSTs into acrylic resin,and then coated onto ABS substrate and cured to obtain a conductive coating.The results show that the optimum addition amount of MSST is 18%,and the surface resistance of MSST conductive coating is lower than that of SST conductive coating.The rheological properties of conductive coatings are measured by means of a rheometer.It is indicated that compared to SST MSST improves more significantly the dispersion,storage stability and mechanical property of acrylic conductive coatings.

姚宇(1996-),男,硕士研究生,研究方向为导电复合材料的制备及应用,yaochao420@163.com