표면 오염을 저감하기 위한 성막 기술에 관한 연구

Abstract

Research of Thin Film Technology for Mitigating Surface Contamination Chang Hoon Kim Advisor: Prof. Jae B. Kwak. Dept. of Mechanical Engineering. Graduate School of Chosun University Surface contamination can appear in various forms and states on surfaces. Among them, preventing surface contamination caused by the undesired adhesion of substances to the surface of objects or living organisms poses significant challenges in diverse industrial applications. Accidents, malfunctions, and performance degradation often result from surface contaminations in industrial settings. Consequently, technologies aimed at mitigating surface contamination have become pivotal for industrial advancements. This study explores thin film technologies to reduce surface contamination, focusing on durable hydrophobic and omniphobic. Additionally super-hydrophilic films manufactured through deposition techniques. In the first approach, durable hydrophobic and omniphobic films were fabricated using iCVD (initiated chemical vapor deposition). The process involved the deposition of p(C6FMA- co-DVB) films with a thickness of 800nm on diverse substrates such as PCB, glass, sand, and fabrics. The resulting films exhibited contact angles greater than 120°, confirming their hydrophobic and omniphobic nature. Mechanical durability tests revealed the films maintaining a contact angle of approximately 120° even after 500 cycles of friction. Additionally, coated nozzles demonstrated improved resistance to clogging during industrial processes, illustrating the effectiveness of these films in practical industrial applications. In the second approach, super-hydrophilic films were fabricated on a nickel sheet using ECD (ElectroChemical Deposition). The process involved preparing a solution using Ni, Fe, Co, SeO2, and LiCl, which was introduced into a three-electrode cell for deposition through constant chronoamperometric methods. Consequently, the films exhibited a contact angle of 0° on water, ethanol, and acetone, confirming there super-hydrophilic properties. EDX analysis revealed the abundant presence of oxygen atoms within the film, enabling hydrogen bonding and contributing to the removal of surface contaminants. However, in durability tests, the contact angle increased from 0° to 45° after a single friction cycle, indicating a decrease in mechanical durability. In conclusion, this study investigates two distinct approaches durable hydrophobic and super -hydrophilic films for surface contamination reduction. While durable hydrophobic films proved effective in industrial applications, the super-hydrophilic films exhibited challenges related to mechanical durability. The research highlights the promising potential of thin film technologies in addressing surface contamination issues, paving the way for further advancements in industrial practices.