Cao Danfeng, Zhang Yingchao, Li Yao, Shi Xiaoyu, Gong Haihuan, Feng Dan, Guo Xiaowei, Shi Zuosen, Zhu Song, Cui Zhanchen
State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China.
Weifang University of Science and Technology, Shouguang 262700, PR China.
Mater Sci Eng C Mater Biol Appl. 2017 Sep 1;78:333-340. doi: 10.1016/j.msec.2017.04.054. Epub 2017 Apr 14.
Superhydrophobic coatings were successfully fabricated by photo-crosslinked polyurethane (PU) and organic fluoro group-functionalized SiO nanoparticles (F-SiO NPs), and were introduced for preventing microleakage in a dental composite restoration. The F-SiO NPs possessed low surface energy and the PU can not only improve the mechanical stability but also promote F-SiO NPs to form multiscale structure, which could facilitate the properties of the as-prepared superhydrophobic coating by synergetic effect. The morphology and properties of the resulted superhydrophobic coatings with different PU/F-SiO ratios were studied using H NMR spectrum, fourier transform infrared spectra, scanning electron microscopy, atomic force microscopy and UV-vis spectrophotometry. The results showed that the superhydrophobic coatings with low PU/F-SiO ratio (1:3) possessed excellent hierarchical papillae structure with trapped air pockets, high contact angle (160.1°), low sliding angle (<1°) and good transparency. Additionally, MTT experiments results certified the prominent cell viability and biocompatibility for clinical application. Based on its fantastically superhydrophobic property, the as-prepared superhydrophobic coatings effectively prevented water permeation in resin composite restoration evaluation. This research may provide an effective method to solve the problem of microleakage and will efficiently increase the success rate of dental composite restorations.
通过光交联聚氨酯（PU）和有机氟基团功能化的SiO纳米颗粒（F-SiO NPs）成功制备了超疏水涂层，并将其引入用于防止牙科复合修复体中的微渗漏。F-SiO NPs具有低表面能，PU不仅可以提高机械稳定性，还能促进F-SiO NPs形成多尺度结构，通过协同效应可促进所制备超疏水涂层的性能。使用核磁共振氢谱、傅里叶变换红外光谱、扫描电子显微镜、原子力显微镜和紫外可见分光光度法研究了不同PU/F-SiO比例的超疏水涂层的形貌和性能。结果表明，低PU/F-SiO比例（1:3）的超疏水涂层具有优异的分层乳头结构，带有截留气穴，高接触角（160.1°），低滑动角（<1°）和良好的透明度。此外，MTT实验结果证实了其在临床应用中具有显著的细胞活力和生物相容性。基于其出色的超疏水性能，所制备的超疏水涂层在树脂复合材料修复评估中有效地防止了水渗透。本研究可能提供一种解决微渗漏问题的有效方法，并将有效提高牙科复合修复体的成功率。
