Surface texturing of polytetrafluoroethylene by hot embossing
Source abstract
Abstract
Abstract In this study, hot embossing by reusable Ni mold with features in the form of rectangular diffraction gratings of 4 μm period was successfully employed for surface texturing of polytetrafluoroethylene (PTFE) film above the glass transition temperature of PTFE amorphous phase with the aim to enhance surface hydrophobicity. Imprint pressure was set to 0.5 MPa and it was at least tenfold lower than reported by other authors using cold stamping. Embossed gratings were clearly seen on the surface of all imprinted samples even after the annealing at 140 °C and aging for 1 month at room temperature. The best results were achieved when imprint temperature was 150 °C. Measurements of the water contact angle on imprinted PTFE surfaces have showed that increase of the average contact angle for the current test setup was 8°. Using imprint stamp with the more favorable features may lead to somewhat higher hydrophobicity.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Surface Modification and Superhydrophobicity · Adhesion, Friction, and Surface Interactions · Metal and Thin Film Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (21)
Show source-provided references
1. Durable ultra-hydrophobic surfaces for self-cleaning applications10.1002/pat.1208 ↗
2. Modification of LDPE molecular structure by gamma irradiation for bioapplications10.1016/j.nimb.2005.04.030 ↗
3. The lowest surface free energy based on –CF3 alignment10.1021/la981727s ↗
4. Influence of nanoscale topography on the hydrophobicity of fluoro-based polymer thin films10.1016/j.apsusc.2004.08.030 ↗
5. Resistance of solid surfaces to wetting by water10.1021/ie50320a024 ↗
6. Wettability of porous surfaces10.1039/tf9444000546 ↗
7. Harper · 2003
8. Effect of aging on the morphology and wettability of polytetrafluoroethylene10.1016/S0167-577X(00)00328-1 ↗
9. Studies on surface modification of poly(tetrafluoroethylene) film by remote and direct Ar plasma10.1016/j.apsusc.2007.10.029 ↗
10. Superhydrophobicity of polytetrafluoroethylene thin film fabricated by pulsed laser deposition10.1016/j.apsusc.2007.04.036 ↗
11. Superhydrophobic polytetrafluoroethylene thin films with hierarchical roughness deposited using a single step vapor phase technique10.1016/j.tsf.2008.12.048 ↗
12. Topological and chemical investigation on super-hydrophobicity of PTFE surface caused by ion irradiation10.1016/j.apsusc.2007.06.044 ↗
13. The effect of topography on water wetting and micro/nano tribological characteristics of polymeric surfaces10.1023/A:1024409316644 ↗
14. Biomimetic, hierarchical structures on polymer surfaces by sequential imprinting10.1016/j.apsusc.2007.10.061 ↗
15. Mass-producible replication of highly hydrophobic surfaces from plant leaves10.1088/0957-4484/17/13/019 ↗
16. Effects of intrinsic hydrophobicity on wettability of polymer replicas of a superhydrophobic lotus leaf10.1088/0960-1317/17/4/003 ↗
17. Nanostructured surfaces of metals and polymers by imprinting with nanoporous alumina10.1002/zaac.200600358 ↗
18. A superhydrophobic dual-scale engineered lotus leaf10.1088/0960-1317/18/1/015019 ↗
19. Stable polytetrafluoroethylene superhydrophobic surface with lotus-leaf structure10.1016/j.jcis.2009.01.027 ↗
20. Cold forging method for polymer microfabrication10.1002/pen.20203 ↗
21. Effects of surface structure on the hydrophobicity and sliding behavior of water droplets10.1021/la020088p ↗