Abstract: A series of self-crosslinking fluorinated acrylate copolymer latex were prepared via the semi- continuous core shell emulsion polymerization method from the dodecafluoroheptyl methacrylate( DFHM)as fluorine-containing monomer, diacetone acrylamide(DAAM)as crosslinking monomer and adipic dihydrazide(ADH)as crosslinking agent.The hydrophobicity of the prepared latex film affected by the fluorine content was investigated.The effect of DFHM and DAAM on the surface properties of the latex film were investigated and the structure and the stability of the film were characterized by infrared spectrometer, differential scanning calorimeter and the contact angle measuring instrument, etc. It was revealed that the surface hydrophobicity and the water resistance of the latex film were enhanced by the introduction of the fluorinecontaining monomer and the crosslinking monomer. When the fluorine content was 6. 84% based on the total weight of polymerizable monomers wherein the content of the fluorine-containing monomer was 12%, the solid content of the prepared emulsion could be up to 38. 2%, and mixed with the crosslinking monomer 4% to form a latex film howing water contact angle 116. 6°, When the content of the fluorine-containing monomer dropped to 4%(i.e., the fluorine content of the system was only 2. 28%), the water contact angle could also reach to 104. 2° by means of higher film-forming temperature and film-forming additives, which presented a good hydrophobic performance.

Key words: fluorine-containing acrylate emulsion, low content of fluorine, hydrophobic, self-crosslinking, semi-continuous core-shell emulsion polymerization

摘要： 为了研究含氟丙烯酸酯乳液涂膜的疏水性与氟含量的平衡关系，以甲基丙烯酸十二氟庚酯（DFHM）为含氟单体，双丙酮丙烯酰胺（DAAM）和己二酸二酰肼（ADH）为交联单体，采用半连续核壳乳液聚合的方法合成了一系列自交联含氟丙烯酸酯共聚物乳液。 研究表明：含氟单体含量为 12%（即氟含量为 6.84%，均以聚合单体的总质量计，下同）时，含氟基团在涂膜表面可以达到饱和，乳液固含量可达 38.2%；再添加 4%交联单体，涂膜的水接触角为 116.6°。 当含氟单体含量降为 4%（氟含量2.28%）时，通过提高成膜温度或添加成膜助剂，也可使涂膜表面的水接触角达到 104.2°，具有较好的疏水性能。

关键词: 含氟丙烯酸酯乳液, 低氟含量, 疏水性, 自交联, 半连续核壳乳液聚合