Development of Superhydrophobic Material SS 17-4 PH for Bracket Orthodontic Application by Metal Injection Molding

International Conference on Chemistry and Material Science 2017

化学;材料科学

Supriadi, S.^1 ; Suharno, B.^2 ; Widjaya, T.^3 ; Ayuningtyas, S.T.^2 ; Baek, E.R.^3

Mechanical Engineering Department, University of Indonesia, Depok, Indonesia^1

Metallurgy and Materials Engineering Department, University of Indonesia, Depok, Indonesia^2

School of Materials Science and Engineering, Yeungnam University, Korea, Republic of^3

关键词: Etching technique;    Etching treatment;    Hydrophobic surfaces;    Metal injection molding;    Orthodontic brackets;    Orthodontic treatments;    Sintered materials;    Superhydrophobic materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/299/1/012096/pdf
DOI  :  10.1088/1757-899X/299/1/012096

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Dental's plaque is a common problem that encountered during orthodontic treatment using bracket. It is caused by demineralization of enamel due to the activity of bacteria. The bacteria increase with remaining excess food which trapped in teeth and bracket. A hydrophobic surface could reduce food attachment on the bracket because of extremely low wettability properties that make it easy to clean with water. There are several methods to obtain hydrophobic surfaces, which are sol-gel, template replica and also etching. The propose of this work is to compare etching treatment and surface modification on sintered SS 17-4 PH as bracket material using CuCl2and HCl as an etchant while stearic acid was used for surface modification. Hydrophobic surfaces were produced under various etching time i.e 15, 30, 45 and 60 seconds for CuCl2and 40, 50, 60 and 70 minutes for HCl and also HCl concentration i.e 1,2 and 3 mol/L at room temperature. The hydrophobicity is observed using contact angle measurement while the microstructures observed by Scanning Electron Microscope. The result shows the contact angle could be achieved up to 60% higher than the as-sintered material. Hydrophobic structure has successfully fabricated using etching technique that might be applied to the orthodontic bracket.