School of Chemical Engineering and Technology , Tianjin University , Tianjin 300350 , China.
Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering , Tianjin University of Technology , Tianjin 300384 , China.
Langmuir. 2018 Jul 3;34(26):7738-7743. doi: 10.1021/acs.langmuir.8b00166. Epub 2018 Jun 18.
Monodisperse patchy silica nanoparticles (PSNPs) less than 100 nm are prepared based on the seed-regrowth method using a poly(ethylene oxide) (PEO)-poly(propylene oxide) (PPO)-PEO-type block copolymer as a surface modifier. Well-defined patches are controllably synthesized through area-selective deposition of silica onto the surface of seeds. After colloidal PSNPs are further modified with trimethylchlorosilane, the advancing and receding contact angles of water for PSNPs are 168 ± 2° and 167 ± 2°, respectively. The superhydrophobic and transparent coatings on the various types of substrates are obtained by a simple drop-casting procedure. Additionally, almost the same superhydrophobicity can be achieved by using colloidal PSNPs via redispersing the powder of superhydrophobic PSNPs in ethanol.
采用种子生长法，以聚氧化乙烯（PEO）-聚环氧丙烷（PPO）-PEO 型嵌段共聚物为表面改性剂，制备了粒径小于 100nm 的单分散性、具有规则纳米凹坑的二氧化硅纳米颗粒（PSNPs）。通过在种子表面选择性地沉积二氧化硅，可以可控地合成具有规则纳米凹坑的 PSNPs。进一步用三甲基氯硅烷对胶体 PSNPs 进行改性后，PSNPs 的前进和后退接触角分别为 168±2°和 167±2°。通过简单的滴涂法，在各种类型的基底上得到了超疏水透明涂层。此外，通过将超疏水 PSNPs 的粉末在乙醇中再分散，也可以使用胶体 PSNPs 获得几乎相同的超疏水性。
