Surface characteristics of the 316L stainless steel modified by ethylene vinyl acetate/chitosan composite films
| Autor: | Shih-Hang Chang, Wei-Jyun Chan, Bo-Yen Huang, Yuan-Ting Tsao, Jyun-Sian Liou |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Composite number 02 engineering and technology 010402 general chemistry 01 natural sciences Chitosan chemistry.chemical_compound Adsorption X-ray photoelectron spectroscopy Polymer chemistry otorhinolaryngologic diseases Materials Chemistry Fourier transform infrared spectroscopy technology industry and agriculture Ethylene-vinyl acetate Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films chemistry Surface modification sense organs 0210 nano-technology Protein adsorption Nuclear chemistry |
| Zdroj: | Surface and Coatings Technology. 320:635-639 |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/j.surfcoat.2016.10.031 |
| Popis: | This study investigated the surface characteristics and anticoagulant properties of 316L stainless steel coated with ethylene vinyl acetate (EVA)/chitosan (CS) composite films, using various EVA/CS ratios, for biomedical applications. The Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) results showed that in the EVA/CS composite films, the signal of the –CH 3 hydrophobic functional group became more significant when the EVA powder content increased. The results of the bicinchoninic acid (BCA) protein assay showed that EVA/CS composite films with EVA/CS content ratios lower than 5 possessed lower adsorption concentrations of bovine serum albumin than chitosan films, suggesting that the anticoagulant properties of 316L stainless steel could be improved after its surface modification with EVA/CS composite films. However, when the EVA/CS content ratio was higher than 8, the anticoagulant properties of the EVA/CS composite films deteriorated significantly because its surface morphology became rougher with abundant protuberances. Therefore, EVA/CS composite films with appropriate EVA/CS content ratios are good candidate materials for biomedical applications because they possess advantages such as hydrophobic properties, smooth surface morphologies, and a low capacity for protein adsorption. |
| Databáze: | OpenAIRE |
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