The main objective was to study the anticorrosion performance of poly(o-toluidine)/nano ZrO2/epoxy composite coating.Poly(o-toluidine)/nano ZrO2 composite was prepared by in situ polymerization of o-toluidine mono...The main objective was to study the anticorrosion performance of poly(o-toluidine)/nano ZrO2/epoxy composite coating.Poly(o-toluidine)/nano ZrO2 composite was prepared by in situ polymerization of o-toluidine monomer in the presence of nano ZrO2 particles.Fourier transformation infrared spectroscopy(FT-IR),UV-visible spectroscopy(UV-vis),X-ray diffraction(XRD),Scanning electron microscopy(SEM),and Thermogravimetric analysis(TGA) were used to characterize the composition and structure of the composite.Poly(o-toluidine)/nano ZrO2 composite was mixed with epoxy resin through a solution blending method and the three components poly(o-toluidine)/nano ZrO2/epoxy composite coating was coated onto the surface of steel sample by the brush coating method.The anticorrosion performance of poly(o-toluidine)/nano ZrO2/epoxy composite coating on steel sample was studied by polarization curve and electrochemical impendence spectroscopy in 3.5% Na Cl solution as corrosion environment and also compared with that of poly(o-toluidine)/epoxy composite coating and pure epoxy coating.It was observed that the composite coating containing poly(otoluidine)/nano ZrO2 composite has got higher corrosion protection ability than that of poly(o-toluidine).The electrochemical measurement results demonstrated that poly(o-toluidine) fillers improve the electrochemical anticorrosion performance of epoxy coating and the addition of nano ZrO2 particles increases the tortuosity of the diffusion pathway of corrosive substances.展开更多
In this study, to improve hemocompatibility of biomedical materials, a waterborne polyurethane (WPU)haepafin release coating system (WPU/heparin) is fabricated via simply blending biodegradable WPU emulsions with ...In this study, to improve hemocompatibility of biomedical materials, a waterborne polyurethane (WPU)haepafin release coating system (WPU/heparin) is fabricated via simply blending biodegradable WPU emulsions with heparin aqueous solutions. The surface compositions and hydrophilicity of these WPU/heparin blend coatings are characterized by attenuated total reflectance infrared spectroscopy (ATR-FTIR) and water contact angle measurements. These WPU/heparin blend coatings show effectively controlled release of heparin, as determined by the toluidine blue method. Furthermore, the biocompatibility and anticoagulant activity of these blend coatings are evaluated based on the protein adsorption, platelet adhesion, activated partial thromboplastin time (APTT), thrombin time (TT), hemolysis, and cytotoxicity. The results indicate that better hemocompatibility and cytocompatilibity are obtained due to blending heparin into this waterborne polyurethane. Thus, the WPU/heparin blend coating system is expected to be valuable for various biomedical applications.展开更多
基金Funded by the Innovation Project of Guangxi Graduate Education(No.YCSZ2014202)
文摘The main objective was to study the anticorrosion performance of poly(o-toluidine)/nano ZrO2/epoxy composite coating.Poly(o-toluidine)/nano ZrO2 composite was prepared by in situ polymerization of o-toluidine monomer in the presence of nano ZrO2 particles.Fourier transformation infrared spectroscopy(FT-IR),UV-visible spectroscopy(UV-vis),X-ray diffraction(XRD),Scanning electron microscopy(SEM),and Thermogravimetric analysis(TGA) were used to characterize the composition and structure of the composite.Poly(o-toluidine)/nano ZrO2 composite was mixed with epoxy resin through a solution blending method and the three components poly(o-toluidine)/nano ZrO2/epoxy composite coating was coated onto the surface of steel sample by the brush coating method.The anticorrosion performance of poly(o-toluidine)/nano ZrO2/epoxy composite coating on steel sample was studied by polarization curve and electrochemical impendence spectroscopy in 3.5% Na Cl solution as corrosion environment and also compared with that of poly(o-toluidine)/epoxy composite coating and pure epoxy coating.It was observed that the composite coating containing poly(otoluidine)/nano ZrO2 composite has got higher corrosion protection ability than that of poly(o-toluidine).The electrochemical measurement results demonstrated that poly(o-toluidine) fillers improve the electrochemical anticorrosion performance of epoxy coating and the addition of nano ZrO2 particles increases the tortuosity of the diffusion pathway of corrosive substances.
基金financially supported by the National Natural Science Foundation of China(Nos.51173118,51273124 and51273126)the National Science Fund for Distinguished Young Scholars of China(No.51425305)+1 种基金the Youth Science and Technology Innovation Team of Sichuan Province(No.2015TD0001)State Key Laboratory of Polymer Materials Engineering(No.sklpme2014-2-03)
文摘In this study, to improve hemocompatibility of biomedical materials, a waterborne polyurethane (WPU)haepafin release coating system (WPU/heparin) is fabricated via simply blending biodegradable WPU emulsions with heparin aqueous solutions. The surface compositions and hydrophilicity of these WPU/heparin blend coatings are characterized by attenuated total reflectance infrared spectroscopy (ATR-FTIR) and water contact angle measurements. These WPU/heparin blend coatings show effectively controlled release of heparin, as determined by the toluidine blue method. Furthermore, the biocompatibility and anticoagulant activity of these blend coatings are evaluated based on the protein adsorption, platelet adhesion, activated partial thromboplastin time (APTT), thrombin time (TT), hemolysis, and cytotoxicity. The results indicate that better hemocompatibility and cytocompatilibity are obtained due to blending heparin into this waterborne polyurethane. Thus, the WPU/heparin blend coating system is expected to be valuable for various biomedical applications.