Affiliation:
1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology 1 , Wuhan 430070, China
2. Hefei General Machinery Research Institute 2 , Hefei 230031, China
3. Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory 3 , Chaozhou 521000, China
4. Hubei Technology Innovation Center for Advanced Composites, Wuhan University of Technology 4 , Wuhan 430070, China
Abstract
Titanium alloy and stainless steel implants have been widely applied in orthopedics. However, harmful ions released from implant corrosion caused by human body fluids and bacterial infections may inhibit patients’ recovery. In this work, a polytetrafluoroethylene-silver composite coating was prepared by RF unbalanced magnetron sputtering to improve the bacterial and corrosion resistance of the SS316L. The removal rates of the composite coatings for Escherichia coli and Staphylococcus aureus reached 97.27% and 99.99%, respectively. The contact angle of 131.5° and fluorescence staining experiments show that the composite coating has an antiadhesive effect on bacteria and less cytotoxicity against osteoblasts. The corrosion voltage of the composite coating was much higher than that of the control SS316L substrate, and the corrosion current density was reduced to 1/3, implying the enhancement of the corrosion resistance of the SS316L substrate.
Funder
Key-Area Research and Development Program of Guangdong Province
the Guangdong Major Progect of Basic and Applied Basic Research
the Self-Innovation Research Funding Project of Hanjiang Laboratory
the Self-Innovation Reserach Funding Project of Hanjiang Laboratory
The Major Science and Technology Project in Zhongshan City, Guangdong Province
This work was also supported by the National Natural Science Foundation of China
the 111 Project
the Technological Innovation of Hubei Province
the central guidance on local science and technology development fund of Hubei Province
independent innovation projects of the Hubei Longzhong Laboratory