| 학회 |
한국공업화학회 |
| 학술대회 |
2019년 봄 (05/01 ~ 05/03, 부산 벡스코(BEXCO)) |
| 권호 |
23권 1호 |
| 발표분야 |
콜로이드·계면화학_포스터 |
| 제목 |
Cassie equation Review : Wetting property measurements of chemically heterogeneous smooth surface |
| 초록 |
Cassie equations have been used in wetting for decades, but the limitations of the Cassie equation due to various applications of wetting researches are being investigated through a variety of experimental and theoretical studies. In this study, the contact angle of water to a surface that is flat and partially chemically heterogeneous (silica surfaces with hexagonal array circular patches of 20 nm thick trichloro-(1H,1H,2H,2H-perfluorooctyl) silane layers) was measured. Patterns with different patch sizes and spacings were utilized to investigate changes in static contact angle due to chemical heterogeneity. We have found that as the diameter of the patch increases, the deviation between the measured value and the Cassie equation increases and the water droplet does not retain its shape. And the deviation from the Cassie equation was observed when the ratio of the diameter of the patch to the base diameter of the droplet was higher than ~0.17. |
| 저자 |
박진우, 정광희, 신은혜, 박주현, 곽상규, 이동욱
|
| 소속 |
울산과학기술원 |
| 키워드 |
Contact angle; wetting; surface
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| E-Mail |
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