微球构筑防污减阻涂层的制备  

Preparation of Anti-fouling and Drag Reduction Coating Constructed by Microspheres

作　　者：宋美艳 赵曼 石淑先[1] 陈晓农[1] SONG Meiyan;ZHAO Man;SHI Shuxian;CHEN Xiaonong(Beijing Laboratory of Biomedical Materials,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学生物医用材料北京实验室,北京100029

出　　处：《中国表面工程》2018年第5期134-141,共8页China Surface Engineering

摘　　要：通过乳液聚合法制备表面具有聚乙二醇(PEG)支链的聚苯乙烯微球,将所得微球悬浮液与丙烯酸酯聚合物乳液共混,采用涂覆的方式制备仿生减阻涂层。考察微球的组成及其粒度、不同微球含量对涂层表面形貌及润湿性的影响,研究交联对涂层稳定性的影响。采用异硫氰酸荧光素标记的牛血清蛋白(BSA-FITC)考察不同微球含量对涂层抗蛋白吸附性的影响,运用扭矩测定法考察了涂层的减阻性能。结果表明:具有PEG支链的聚苯乙烯微球粒径具有单分散性,所得仿生涂层表面分布着大量的聚合物微球,且随着微球质量分数增大,涂层水接触角减小、亲水性增强;交联反应显著改善涂层的耐水稳定性;与未添加微球的涂层相比,当微球质量分数为15%时,涂层的抗蛋白吸附效率最大可达到97%,当微球质量分数为6%时,涂层的减阻率最大可达到21%。Polystyrene microspheres with hairy polyethylene glycol （PEG） chains on surface was prepared by emulsion polymerization. Aqueous suspension of the microspheres was then blended with an acrylic polymer emulsion to form a latex blend. A biomimetic layer was obtained through coating approach using the latex blend. The composition and particle size of the microspheres and its content in the coating layer on the surface morphology and wettability of the coating layer were investigated, respectively. The effect of crosslinking within the coating layer on the stability of the coating layer was also studied. Protein adsorption of the coatings with different contents of the microsphere was investigated using BSA-FITC. Drag- reducing efficiency of the coatings was tested using torque measurement. The results show that the polystyrene microspheres with PEG hairy chains are monodispersed regarding their particle size. A large number of the microspheres present on the surface of the coating prepared from the latex blend. The hydrophilicity of the coating layer increases with the increase of the microspheres content in the layer, indicated by the contact angle of water drop. Crosslinking reaction significantly improves the stability of the coatings under water. Compared with the coating without microspheres, the coatings with 15% content of microspheres provided dramatically less protein adsorption by 97%. With 6% content of microspheres, the drag-reducing efficiency of the coatings attains 21%.

关 键 词：减阻涂层 微球涂覆法 抗蛋白吸附 减阻性能 

分 类 号：TB333.23[一般工业技术—材料科学与工程] Q811.7[生物学—生物工程]