【摘要】 目的制备一种高耐水性的亲水防雾涂层。方法通过光引发巯基-烯点击化学反应,合成聚醚改性多面体低聚倍半硅氧烷(POSS),得到聚醚改性POSS(POSS-SH6-PEGMA2),采用FT-IR、1H-NMR表征合成产物的结构。将其与亲水性UV树脂混合,在聚碳酸酯基板上涂布、光固化,形成高耐水性亲水防雾层。采用X射线光电子能谱仪(XPS)分析涂层表面元素,通过超景深三维显微镜对涂层表面形貌进行分析,使用接触角分析仪表征涂层的亲水性,并评价涂层的耐水性和防雾性能。结果通过XPS得到的结果表明,POSS在涂层中发生迁移,富集在涂层表面。通过超景深三维显微镜观察涂层表面发现,表面产生了一系列不同的微观结构,表面粗糙度增大。随涂层中POSS-SH6-PEGMA2的含量增大,涂层的耐水性、亲水性以及防雾性能增强。当POSS-SH6-PEGMA2的含量为55%时(POSS含量为9.71%),涂层的耐水性(吸水率为7.3%)、亲水性(水接触角为7.41°±2.35°)和防雾性能最佳。结论在聚乙二醇二丙烯酸酯涂层中添加一定量聚醚改性POSS(POSS-SH6-PEGMA2的含量为55%),能获得高耐水性的亲水防雾涂层。更多还原

【Abstract】 The work aims to fabricate a water resistant hydrophilic anti-fog coating. Polyether modified POSS(POSS-SH6-PEGMA2) was prepared by synthesizing polyether polyhedral oligosilsesquioxanes through thiol-ene click chemistry. The structure of the reaction products were characterized by FT-IR and 1 H-NMR. Then, the reaction products were mixed with hydrophilic UV resin. The mixture was coated and UV-cured on a cleaned polycarbonate sheet to form a hydrophilic anti-fog coating with high water resistance. The X-ray photoelectron spectroscopy was used to analyze surface elements of the coating. The 3 d optical microscope was used to analyze the surface topography of coatings. The contact angle measurement was used to characterize the hydrophilic property of coatings. The water resistance and anti-fog performance were also evaluated. The XPS results indicated that POSS migrated in the coating and enriched on the surface. With the help of the 3 D optical microscope, a series of different micro structures were found on the surface, indicating that the surface roughness was increased. The hydrophilic and anti-fog properties and water resistance of the coating were improved with the increase of the content of POSS-SH6-PEGMA2 within a certain range, and the coating had the best water resistance(the water absorption rate was 7.3%), hydrophilic property(the water contact angle was 7.41°±2.35°) and anti-fog performance when the content of POSS-SH6-PEGMA2 was 55%(9.71% POSS). Adding polyether modified POSS into PEGDMA coating(the content of POSS-SH6-PEGMA2 is 55%) can obtain a hydrophilic and anti-fog coating with high water resistance.更多还原