仿珍珠层自组装制备有机/无机纳米复合薄膜

Self-assembled organic/inorganic nanocomposite thin film of mimic nacre

模仿珍珠层结构,采用蒸发诱导自组装的方法,在石英片表面制备了聚三缩丙二醇双丙烯酸酯(PTPG-DA)/SiO2纳米复合薄膜,采用FT-IR、XRD和TEM等分析技术对薄膜结构进行了表征,测试了其摩擦力学行为,并初步讨论了纳米复合薄膜的形成机理。结果表明,所制备的薄膜具有有机/无机有序交替的层状纳米复合结构,其聚合前的层间距为2.65 nm,聚合后的层间距为2.35 nm。聚合后的纳米复合薄膜具有较好的减摩性能。

Mimicking the structure of nacre, the poly（tripropylene glycol diacrylate, TPGDA）/SiO2 nanocomposite thin film was prepared using an evaporation- induced self- assembly procedure on the quartz glass substrate. The structure of the nanocomposite thin film was characterized by means of FT-IR spectroscope, X-ray diffraction （XRD） and transmission electron microscope （TEM）. The frictional force behavior of the nanocomposite thin film was tested. The formation mechanism of the poly（TPGDA）/SiO2 nanocomposite thin film was investigated. The results indicate that the thin film is composed of organic and inorganic layers in alternately orderly arrangement. The distance between the organic layer and inorganic layer is 2.69 nm before polymerization and 2.35 nm after polymerization. Moreover, the polymerized film has preferable antiwear property.