[논문]플라즈마 에칭 처리된 PTFE 표면의 발수성 연구

강효민; 김재형; 이상혁; 김기웅

doi:10.5407/jksv.2021.19.3.123

플라즈마 에칭 처리된 PTFE 표면의 발수성 연구
Study on Water Repellency of PTFE Surface Treated by Plasma Etching 원문보기

한국가시화정보학회지= Journal of the Korean society of visualization, v.19 no.3, 2021년, pp.123 - 129

강효민 (Department of Mechanical Engineering, Hannam University) , 김재형 (Nuclear Equipment Qualification & Safety Research Group, Korea Institute of Machinery and Materials) , 이상혁 (Nuclear Equipment Qualification & Safety Research Group, Korea Institute of Machinery and Materials) , 김기웅 (Department of Mechanical Engineering, Hannam University)

Abstract ▼ AI-Helper

Many plants and animals in nature have superhydrophobic surfaces. This superhydrophobic surface has various properties such as self-cleaning, moisture collection, and anti-icing. In this study, the superhydrophobic properties of PTFE surface were treated by plasma etching. There were four important factors that changed the surface properties. Micro-sized protrusions were formed by plasma etching. The most influential parameter was RF Power. The contact angle of the pristine PTFE surface was about 113.8°. The maximum contact angle of the surface after plasma treatment with optimized parameters was about 168.1°. In this case, the sliding angle was quite small about 1°. These properties made it possible to remove droplets easily from the surface. To verify the self-cleaning effect of the surface, graphite was used to contaminate the surface and remove it with water droplets. Graphite particles were easily removed from the optimized surface compared to the pristine surface. As a result, a surface having water repellency and self-cleaning effects could be produced with optimized plasma etching parameters.

주제어

표/그림 (10)

표 Table 1. Main parameters of plasma treatment
표 Table 2. PTFE sheets with plasma treatment
그림 Fig. 1. Schematic diagram of plasma etching system.
그림 Fig. 2. Schematic diagram for investigation of surface water repellency.
그림 Fig. 3. A) Contact angle and sliding angle of treated samples. B, C, D, E) Changes in contact angle for RF power, exposure time, total gas flow and O₂ gas flow.
그림 Fig. 4. Contact angle for each sheet. A) Pristine sheet, B) Sheet No.1, C) Sheet No. 9.
그림 Fig. 5. Droplet behavior on the surface. A) Sheet No.1, B) Sheet No.9.
그림 Fig. 6. Morphological features of plasma etched surface. A) Sheet No.1, B) Sheet No.9.
표 Table 3. Contact angle and sliding angle of PTFE sheets.
그림 Fig. 7. Water repellency of sheets. A) Droplet collision on pristine sheet. B) Droplet collision on Sheet No.9. A droplet dropping onto a dirty surface with graphite. C) Pristine sheet, D) Sheet No.9.

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