Surface and Protein Adsorption Properties of 316L Stainless Steel Modified by Polyvinyl Alcohol and Plasma-Treated Polyvinyl Alcohol Films and Surface Modification of Graphite Rod Electrodes by Cetyltrimethylammonium Bromide for Microbial Fuel Cells

• Main Author: 童冠韋
• Other Authors: 張世航
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/d5jd9z

碩士 === 國立宜蘭大學 === 化學工程與材料工程學系碩士班 === 107 === The first part of this study is to investigate the surface and protein adsorption properties of 316L stainless steels coated with polyvinyl alcohol (PVA) and N2-plasma-modified PVA films. The water contact angle of the 316L stainless steel significantly decreased after the coating with the PVA film owing to the abundant hydrophilic functional groups formed on the surface of the PVA film. The signal of the hydrophilic functional groups of the PVA film became more significant after the N2 plasma modification, leading to a further decrease in the water contact angle of the PVA film. Electrochemical tests showed that the corrosion resistance of the 316L stainless steel improved by the coating of the PVA and N2-plasma-modified PVA films. Bicinchoninic-acid protein assay results showed that the 316L stainless steels coated with the PVA and N2-plasma-modified PVA films exhibited lower bovine serum albumin concentrations than that of the neat 316L stainless steel, indicating that the anticoagulant properties of the 316L stainless steel surface could be improved after the coating with the PVA and plasma-modified PVA films. The second part of the study is to investigate the surface and electrochemical properties of the graphite rod electrodes surface-modified by soaking in a cetyltrimethylammonium bromide (CTAB) solution followed by plasma-treatment. Water contact angle measurement results show that the surface of the graphite rod electrode becomes highly hydrophilic after modified by CTAB and plasma, which is promising for the biosorption on the anode electrodes of MFCs. Electrochemical measurements show that the power density generated from the MFC configured with graphite rod modified by CTAB and plasma is higher that of the MFC configured with untreated graphite rod electrode. Surface modification of graphite rod by CTAB and plasma is a non-toxic, rapid, and cost-effective process, making it promising for the fabrication of large-scale MFCs