采用自由基聚合法合成了聚乙二醇双丙烯酸酯(PEGDA)/甲基丙烯酸β-羟乙酯(HEMA)共聚物水凝胶,材料表面在非反应性气体氢气气氛下进行等离子体表面处理,并在紫外光辐照条件下进行丙烯酰胺接枝共聚.红外谱图证明PEGDA/HEMA共聚物水凝胶上接枝了酰胺基团,材料的亲水性提高,等离子体表面处理后,材料表面形成含氧基团,氮原子含量增加.
The poly(ethylence glycol) diacrylate(PEGDA)/2-hydroxyethyl methacrylate(HEMA) hydrogels crossinked network copolymers were prepared by living radical polymerization.The hydrogels were immersed into acrylamide solution by UV-light after being treated by argon(Ar)-plasma.Attenuated total reflection-flourier transform infrared(ATR-FT-IR) spectroscopy showed that the amide linkage has been substantially introduced to surface of PEGDA/HEMA hydrogels as plasma treatment proceeded.Contact angle on Ar-plasma treated surface decreased with increasing of the concentration acrylamide solution, which improves the hydrophilicity of the PEGDA-based hydrogel surface.X-ray photoelectron spectroscopy(XPS) showed that nitrogen has been introduced, which increases from 0.416% to 3.352% on the surface of membrane after modification.
参考文献
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