Synthesis and characterization of emulsifier-free core–shell fluorine-containing polyacrylate latex
Synthesis and characterization of emulsifier-free core–shell fluorine-containing polyacrylate latex
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DOI：
10.1016/j.colsurfa.2007.03.037
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发表时间：
2007-08
期刊：
影响因子：
--
通讯作者：
Xuejun Cui;Shuangling Zhong;Hongyan Wang
中科院分区：
文献类型：
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作者：
Xuejun Cui;Shuangling Zhong;Hongyan Wang
以含氟丙烯酸酯和无氟丙烯酸酯单体为原料，以聚甲基丙烯酸甲酯（PMMA）粒子为种子，采用无皂种子乳液聚合法，在水中成功制备了壳层富含含氟聚合物的核壳型含氟聚丙烯酸酯乳胶粒。采用傅里叶变换红外光谱（FTIR）和透射电镜（TEM）分别对核壳结构和化学组成进行了表征。TEM、SEM和动态光散射分析表明，核壳结构粒子均匀，粒径分布窄。X射线光电子能谱（XPS）分析表明，在核壳型含氟乳胶膜的结构中，从膜-空气界面到膜-玻璃界面，氟的激发浓度呈梯度变化。此外，与相同聚合条件下制备的核壳型无氟聚丙烯酸酯乳胶膜相比，核壳型含氟乳胶膜具有更高的接触角和热稳定性。
Core–shell fluorine-containing polyacrylate latex particles with fluorine-containing polymer rich in shell were successfully prepared by emulsifier-free seeded emulsion polymerization of fluorine-containing acrylate and fluorine-free acrylate monomers in water with PMMA particles as seeds. The chemical composition and core–shell structure were investigated by Fourier transform infrared (FTIR) spectrometry and transmission electron microscopy (TEM), respectively. TEM, scanning electron microscopy (SEM) and dynamic light scattering (DLS) analysis indicated that the core–shell particles were uniform and possessed narrow size distributions. X-ray photoelectron spectroscopy (XPS) analysis revealed that a gradient concentration of fluorine excited in the structure of the core–shell fluorine-containing latex film from the film–air interface to the film–glass interface. In addition, compared with the latex film of core–shell fluorine-free polyacrylate prepared under the similar polymerization condition, the core–shell fluorine-containing latex film showed higher contact angle and thermal stability.