作　　者： ;

机构地区： 东莞理工学院化学工程与能源技术学院

出　　处： 《化工新型材料》 2020年第5期168-171,共4页

摘　　要： 采用Pickering乳液聚合工艺制备苯丙聚合物/SiO2(PSA/SiO2)复合乳液。透射电镜(TEM)和傅里叶红外光谱(FT-IR)分析显示复合乳胶粒为典型的草莓型结构,纳米SiO2通过静电吸附在乳胶粒表面。动态光散射(DLS)结果证实纳米SiO2作为Pickering乳化剂降低了复合乳液的平均粒径。X射线光电子能谱分析(XPS)结果发现Si-OH亲水基团在复合涂层表面富集。原子力显微镜(AFM)图片显示纳米SiO2在涂层表面均匀分布且形成微细结构。水接触角(WCA)分析发现复合涂层的超亲水机理符合Cassie的复合接触角理论。 The poly(styrene-acrylate)/SiO2 composite latexes(PSA/SiO2)were prepared by pickering emulsion polymerization.Transmission electron microscopy(TEM)and fourier transform infrared(FT-IR)spectra results shown that raspberry-like composite latexes were obtained and SiO2 particles were adsorbed on the surface of latexes.Dynamic light scattering(DLS)disclosed that the average particle size of composite latexes decreased which was attributed to the emulsification of SiO2.X-ray photoelectron spectroscopy(XPS)confirmed that Si-OH hydrophilic groups were enriched on the surface of composite films.Atomic force microscope(AFM)indicated that SiO2 particles were uniformly distributed and simultaneously formed the microstructure.Water contact angle(WAC)demonstrated that the superhydrophilic principle of composite films was according to the Cassie’s law.

关 键 词： 乳液聚合 微细结构 超亲水

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