笼型倍半硅氧烷(POSS)基多含氟支链共聚物的制备及其在棉织物上的应用

Ov-POSS-based multi-branched fluorine containing copolymer:preparation and application to cotton fabrics

以季戊四醇为原料,经4步合成了含三条全氟烷基链的丙烯酸酯单体,并以偶氮二异丁腈(AIBN)为引发剂,与八乙烯基笼型倍半硅氧烷(Ov-POSS)和甲基丙烯酸甲酯(MMA)进行自由基溶液聚合获得POSS基含氟共聚物。经核磁共振(~1H-NMR、^(19)F-NMR、^(13)C-NMR)、红外光谱(FT-IR)、元素分析、扫描电子显微镜(SEM)和热重分析(TGA)等进行确证和表征。通过调节3种单体配比,可以获得具有超疏水性、良好疏油性的共聚物(Ov-POSS质量分数10%,MMA与含氟单体摩尔比为4:1),经其处理过的棉织物的对水接触角能够达到156°,对色拉油接触角为124°。

An acrylate monomer containing three perfluoroalkyl chains was synthesized starting from pentaerythritol. It was then copolymerized in solution with octavinyl polyhedral oligomeric silsesquioxane（Ov-POSS）and methyl methacrylate（MMA）initiated by azodiisohutyronitrile（AIBN）to afford a novel Ov-POSS-hased copolymer grafted with muhi-perfluoroalkyl chains. The copolymers were characterized by NMR, FT-IR, elemental analysis, scanning electron mieroscopy（SEM）and thermogravimetric analysis（TGA）. The cotton fabrics coated with these copolymers possessed superhydrophohicity and good oil repellency. The water and salad oil contact angle of cotton fabrics treated with copolymer（mass containing of Ov-POSS as 10 %, mole ratio of MMA/fluorine containing monomer as 4/1）could be achieved 156° and 124°, respectively.