作　　者： ; ; ; ; ; ;

机构地区： 华南理工大学化学与化工学院

出　　处： 《电镀与涂饰》 2015年第18期1003-1008,共6页

摘　　要： 以甲基丙烯酸甲酯(MMA)、丙烯酸正丁酯(BA)、甲基丙烯酸-β-羟乙酯(HEMA)、2-(全氟辛基)乙基甲基丙烯酸酯(FMA)、甲基丙烯酸酯基异丁基八面低聚倍半硅氧烷(MAPOSS)为单体,偶氮二异丁腈(AIBN)为引发剂,采用自由基溶液聚合法合成了含POSS含氟杂化丙烯酸酯共聚物。然后用二甲苯与三氟三氯乙烷的混合溶剂溶解该共聚物,将玻璃片和不锈钢滤网浸入其中,通过浸渍提拉法得到一层疏水涂膜。研究了POSS的含量对涂膜疏水性的影响。采用场发射扫描电子显微镜(SEM)、原子力显微镜(AFM)和X射线光电子能谱仪(XPS)对涂膜的表面形貌和元素进行了表征。结果表明,杂化共聚物中的POSS能够自发聚集在玻璃片和滤网表面,形成特定的粗糙结构,而随POSS含量增多,其聚集带来的表面粗糙度增加,导致涂膜的水接触角更大。当POSS质量分数为20%时,POSS聚集表面的平均粗糙度(Ra)达到209 nm,同时低表面能的氟在涂膜表面的质量分数为25.70%,结合滤网本身的微米孔结构,三者共同作用造就了涂膜滤网表面良好的疏水性,其水接触角达到144°。 A POSS （polyhedral oligomeric silsesquioxane）-containing fluorinated polyacrylate copolymer was synthesized via free radical solution polymerization with methyl methacrylate （MMA）, n-butyl acrylate （BA）, 2-hydroxyethyl methacrylate （HEMA）, 2-（perfluorooctyl）ethyl methacrylate （FMA）, and methacrylisobutyl-POSS （MAPOSS） as monomers, and azobisisobutyronitrile （AIBN） as initiator. Hydrophobic coatings were formed on glass plate and stainless steel mesh by dip coating method in a mixture of xylene and trichlorotrifluoroethane dissolved with the hybrid copolymer. The effect of POSS content on coating＇s hydrophobicity was studied. The surface morphology and chemical compositions of the coatings were characterized by field-emission scanning electron microscopy （SEM）, atomic force microscopy （AFM）, and X-ray photoelectron spectroscopy （XPS）. The results revealed that POSS contained in the hybrid copolymer can self-aggregate into a defined rough structure on the surfaces of glass plate and stainless steel mesh. The surface roughness caused by the aggregation of POSS is increased with the increasing of POSS content, resulting in larger water contact angle of the coating. When the content of POSS is 20wt%, the surface average roughness （Ra） of POSS aggregation reaches 209 nm, and the surficial mass fraction of low-surface-energy fluorine is 25.70% on the coating. The combination of the above two factors and the inherent micron-scale porous structure leads to a highly hydrophobic surface of the coated stainless steel mesh, whose water contact angle is 144°.

关 键 词： 多面低聚倍半硅氧烷 氟化丙烯酸酯 杂化共聚物 自由基溶液聚合 疏水性 浸渍提拉法 不锈钢滤网

领　　域： [化学工程]