Superhydrophobic Paper by Facile and Fast Atmospheric Pressure Plasma Etching

Abstract

Superhydrophobic and to some extent oleophobic paper surfaces are prepared using atmospheric pressure plasma etching. A novel dielectric barrier discharge operating in helium-oxygen mixture is used to rapidly etch organic material from paper surface and create hierarchical topography and subsequently a thin fluorocarbon film is deposited to modify the surface energy. The enhancement of surface topography is achieved via the selective removal of organic matter over inorganic calcium carbonate (calcite) fillers that co-exist in paper. The process led to the fabrication of roll-off superhydrophobic paper with water contact angles >1508 and hysteresis <108 for all samples treated over 2 min with no deterioration of paper quality. Further treatment over 8 min resulted also in diiodomethane repellent surfaces. Figure 7. Superhydrophobic color-printed paper (a) and piece of an old document (b). Superhydrophobic Paper by Facile and Fast Atmospheric.

Surface Modification of Polymer Substrates for Biomedical Applications

“…The plasma modification of polymeric substrates has been used for many potential applications in biology and biochemistry. The modified surfaces may enhance the protein absorption [85], induce superhydrophobic paper surfaces by using atmospheric pressure plasma etching [86], they may be applied for biomolecule immobilization and environmentally stable super hydrophobic and superoleophobic behavior [87,88] or lab-on-a-chip applications [89]. Biomedical applications of natural-based polymers combined with bioactive glass nanoparticles have been reported recently [90], the influence of silver doped bioactive glass nanoparticles on antibacterial bioadhesive layer for orthopedic applications was confirmed as well [91].…”

Superomniphobic Papers for On‐Paper pH Sensors

“…To overcome this issue, in this work, we developed a superomniphobic paper through a simple technique of growing nanofilaments on the microfibers of the paper. Unlike prior work, our superomniphobic paper displays very low roll‐off angle, indicative of ultra‐high droplet mobility, even with low surface tension liquids (e.g., n ‐hexadecane). Further, the required hierarchical texture is formed using a grow‐from approach on inherent microfibers of the paper, without noticeably altering the microscale features (i.e., diameter and distance of the microfibers).…”

Characterization of surface dielectric barrier discharge (SDBD) based on PI/Al2O3 nanocomposite

“…[32][33][34][35] For example, He/O 2 atmospheric pressure plasma was used to selectively etch cellulose fibers and any internal sizing agents, the inorganic fillers (calcite) were exposed and the micro-and nano-scale topography was enhanced, this process was a prerequisite for obtaining superhydrophobic paper. [33] Low pressure O 2 plasma was used to selective etch glass filled polyphenolics, the glass fillers were uncovered and tracking resistance properties were improved. [34] The same composite were further selectively etched by O 2 /Ar plasma in order to study the plasma processing mechanisms, the optimization of plasma parameters, and to increase the etching efficiency with controlled surface temperature.…”