基于聚琥珀酰亚胺衍生物仿生超亲水表面的制备及性能

利用对聚琥珀酰亚胺(PSI)的亲核加成反应,仿生设计合成侧基带有多巴胺和磺酸甜菜碱两性离子基团的新型聚琥珀酰亚胺衍生物(PSI-DA-ZW);通过聚琥珀酰亚胺衍生物中多巴邻苯二酚基团的氧化自聚和沉积,制备了仿生超亲水功能涂层表面(PSI-DA-ZW/glass).利用X射线光电子能谱仪(XPS)、扫描电子显微镜(SEM...

Preparation and Characterization of Biomimetic Superhydrophilic Surface Based on Polysuccinimide Derivatives

In this work,a novel type of polysuccinimide(PSI)derivative with dopamine and zwitterionic sulfobetaine groups in the side chain was designed and synthesized via nucleophilic ring-opening reaction on polysuccinimide.Then,a biomimetic superhydrophilic coating(PSI-DA-ZW/glass)was prepared through the oxidative self-polymerization and deposition of the pendant catechol anchor group in PSI-DA-ZW on the surface of glass.The micro-chemical structure,wettability and transmittance of the functional coatings were characterized by Fourier transform infrared spectrometer(FTIR),X-ray photoelectron spectroscopy(XPS),scanning electron microscope(SEM),contact angle measuring instrument,and UV-visible spectroscopy(UV-Vis),respectively.The research results showed that the zwitterionic group was successfully introduced to the surface of the PSI-DA-ZW/glass sample.Compared with the original surfaces,the obtained biomimetic functional surface had self-assembly into nanoscale microstructures,with a water contact angle(WCA)close to 0°and an underwater-oil contact angle(UWOCA)close to 180°,presenting excellent superhydrophilic and underwater oil-repellent properties.Meanwhile,the functional surface had a light transmittance of 90.4%at 550 nm,showing good antireflection effect compared with that of the blank glass.Moreover,the bacterial adhesion experiments demonstrated that PSIDA-ZW/glass surface exhibited obvious anti-adhesion properties for S.aureus and E.coli.The simple and effective method for preparing biomimetic functional surface proposed in this study is suitable for different substrates and thus had potential application in the fields of sanitary materials,biomedical coatings,oil-water separation,antifouling coatings and so on.