One-Step Fabrication of Superhydrophobic Surfaces with Wettability Gradient Using Three-Dimensional Printing
- Authors
- Sung, Jaebum; Lee, Hoo Min; Yoon, Gil Ho; Bae, Sungchul; So, Hongyun
- Issue Date
- Jan-2023
- Publisher
- Korean Society for Precision Engineeing
- Keywords
- Wettability gradient; Superhydrophobic; 3D printing; Rapid prototyping; Droplet control
- Citation
- International Journal of Precision Engineering and Manufacturing - Green Technology, v.10, no.1, pp.85 - 96
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- International Journal of Precision Engineering and Manufacturing - Green Technology
- Volume
- 10
- Number
- 1
- Start Page
- 85
- End Page
- 96
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/185420
- DOI
- 10.1007/s40684-022-00418-y
- ISSN
- 2288-6206
- Abstract
- Polymer surfaces with wettability gradient were fabricated using three-dimensional (3D) printing technology to control the velocity of droplets on the surfaces. A microscale pattern of a semicircular casting mold was created layer-by-layer using a 3D printer based on fused deposition modeling. A surface with a wettability gradient was fabricated by replicating the semicircular mold with a continuously varying surface slope. Water contact angle measurements and droplet test results demonstrated the characterization of the wettability gradient. Droplets were released on a gradient surface inclined at 80°, and their movements were controlled; the locations of the droplets after collision on the ground were tracked. The distance of the main drop and splash drop was found to be reduced by 96.7% (from 6.1 to 0.2 cm) and 87.8% (from 18.8 to 2.3 cm), respectively, compared to that on a general superhydrophobic surface. This study demonstrates a simple, rapid, and inexpensive microfabrication method for functional polymer surfaces to control droplet movement using 3D printing technology.
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