摘要：

采用原位乳液聚合法，在可聚合阴离子乳化剂/非离子乳化剂复配体系下，以γ-甲基丙烯酰氧丙基三甲氧基硅烷(KH-570)改性的纳米SiO₂、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、丙烯酸(AA)等为核相组成，以MMA、BA及甲基丙烯酸十二氟庚酯(DFMA)为壳相单体，合成纳米SiO₂/

关键词: 原位乳液聚合；改性纳米FONT-SIZE: 10.5pt, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体, mso-bidi-font-size: 11.0pt, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast" lang=EN-US>SiO₂FONT-SIZE: 10.5pt, mso-ascii-font-family: Calibri, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-bidi-font-size: 11.0pt, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast">；含氟丙烯酸酯；核壳结构；疏水性

Abstract:

The core-shell nano-SiO₂/fluorinated polyacrylate emulsion containing fluorine in the shell was synthesized via in-situ emulsion polymerization in the presence of reactive anionic emulsifier and nonionic emulsifier, with the core phase consisting of nano-SiO₂ modified by γ-(methacryloxy）propyltrimethoxy silane (KH-570), methyl methacrylate (MMA), butyl acrylate (BA）and acrylic acid (AA), and the shell phase monomer consisting of methyl methacrylate (MMA), butyl acrylate (BA）and dodecafluoroheptyl methacrylate (DFMA).The influence of the amount of nano-SiO₂ and fluorine-containing monomer (DFMA）on the emulsion polymerization process and surface hydrophobic properties of the latex films was discussed.The nano-SiO₂/fluorinated polyacrylate emulsion and its films were characterized by transmission electron microscopy (TEM), differential scanning calorimetry (DSC), thermogravimetry (TG), contact angle (CA）and X-ray photoelectron spectroscopy (XPS）analysis.The results showed that the resultant particles had core-shell structure and a gradient distribution of fluorine in the latex films was formed.The core-shell nano-SiO₂/fluorinated polyacrylate latex film showed higher hydrophobicity and thermal stability comparing with fluorinated polyacrylate latex film due to the addition of nano-SiO₂.

Key words: 原位乳液聚合；改性纳米FONT-SIZE: 10.5pt, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体, mso-bidi-font-size: 11.0pt, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast" lang=EN-US>SiO₂FONT-SIZE: 10.5pt, mso-ascii-font-family: Calibri, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-bidi-font-size: 11.0pt, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast">；含氟丙烯酸酯；核壳结构；疏水性