Hydrophobicity and transparency of Al2O3-based poly-tetra-fluoro-ethylene composite thin films using aerosol deposition

Cho, Myung‐Yeon; Park, Sung‐Joon; Kim, So-Mang; Lee, Dongwon; Kim, Hongki; Koo, Sang‐Mo; Moon, Kyoung-Sook; Oh, Jong‐Min

doi:10.1016/j.ceramint.2018.06.076

Cited by 17 publications

(9 citation statements)

References 22 publications

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“…The hydrophobicity and transmittance of the 0.3 wt.% film can be affected by the relatively large roughness of approximately 22 nm as seen in Figure 3c. These results and trends closely match our previous research regardless of the architectural glass used 37 …”

Section: Resultssupporting

confidence: 92%

“…Notably, this layer was deposited using only three scans during the AD process, indicating that the deposition rate is approximately 1 µm/scan, which is higher than other processes 45‐48 . If a large number of low‐density PTFE particles is placed in the aerosol chamber, the PTFE particles have a better aerosolization than the ceramic particles, inducing substantial increase in deposition rate 37 . Figure 6B shows the visible CA when the water was dropped in two regions with and without the coating layers.…”

Section: Resultsmentioning

confidence: 94%

“…In our previous research, we fabricated transparent hydrophobic Al 2 O 3 /PTFE composite layers onto an experimental slide glass through AD. 37 We attempted to not only investigate the deposition feasibility onto actual architectural glass but to also obtain the optimal PTFE ratio for Al 2 O 3 /PTFE film to simultaneously achieve transparency and hydrophobicity. All composite layers with approximately 100 nm thickness were well-deposited on the architectural sheet glass.…”

Section: Transparent Hydrophobic Al 2 O 3 /Ptfe Composite Layersmentioning

confidence: 99%

“…These results and trends closely match our previous research regardless of the architectural glass used. 37 We successfully transferred the hydrophobic transparent Al 2 O 3 /PTFE coating onto the architectural glass; however, there are drawbacks, such as the PTFE-induced rough surface, and change in the PTFE content between the mixing powder and real film. This is demonstrated in Figure S1, in which the amount of PTFE in the actual film is over 32 times that in the Al 2 O 3 /PTFE composite powder with 0.1 wt.% PTFE, as confirmed by the F ratio.…”

Section: Transparent Hydrophobic Al 2 O 3 /Ptfe Composite Layersmentioning

confidence: 99%

“…[34][35][36] In our previous study, AD process successfully achieved hydrophobic and transparent properties by fabricating an alumina/polytetrafluoroethylene (Al 2 O 3 /PTFE) composite layer on the slide glass. 37 However, the manual mixing of Al 2 O 3 and PTFE resulted in the deterioration of the surface quality and transparency by the PTFE lumps. Moreover, the amount of PTFE in the starting powder and actual film differed due to the difference in the particle density.…”

Section: Introductionmentioning

confidence: 99%

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Aerosol‐deposited Al₂O₃/PTFE hydrophobic coatings with adjustable transparency

et al. 2020

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With the wide range of requirements for architectural glass, such as transparency, opacity, and hydrophobicity, there is a need to address the issues in the complexity of convention methods. Thus, considering functionality and applicability in various architectural windows, hydrophobic alumina/polytetrafluoroethylene (Al2O3/PTFE) composite layers with transparency or opacity were transferred to commercial architectural glass using a facile aerosol deposition (AD) process. We successfully fabricated hydrophobic coating layers with high transmittance (only a 0.03% difference from sheet glass) by optimizing the PTFE content in Al2O3 using solution‐based synthesized powders to enable a uniform surface topology. The opaque hydrophobic Al2O3/PTFE coating layers exhibit a transmittance of approximately 0% with excellent hydrophobicity of 130°. Remarkably, this opaque film was successfully employed onto a large deposition area, curved substrate, and micro‐patterned regions. It is believed that our AD‐prepared composite layers have great potential for architectural glass in terms of economic feasibility and versatility.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 94%

Section: Transparent Hydrophobic Al 2 O 3 /Ptfe Composite Layersmentioning

confidence: 99%

Section: Transparent Hydrophobic Al 2 O 3 /Ptfe Composite Layersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Aerosol‐deposited Al₂O₃/PTFE hydrophobic coatings with adjustable transparency

et al. 2020

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Powder Aerosol Deposition and Polymers: Is There Hope for a Common Future?

Thiel,

Lienkamp

2024

Adv Eng Mater

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Polymer‐Ceramic Composites (PCC) are promising functional materials with a wide range of applications in energy technology, microelectronics and sensor technology, as protective coatings, in wastewater treatment or for biomedical purposes. Unfortunately, ceramics require high‐temperature sintering, while polymers only have a limited thermal stability. Therefore, PCC fabrication is quite complex and requires strict process control. This severely limits the efficiency and economy of the process, and the reproducibility of the desired materials properties. Powder Aerosol Deposition (PAD) is a spray coating process in which ceramic powders are accelerated by a pressure difference using a carrier gas. They are then deposited as nanocrystalline, dense coatings onto different kinds of substrates without the need for additional sintering. Current research focuses on materials obtained from PAD of ceramic powders. Yet there are also examples of mixed polymer and ceramic particles that have been successfully deposited in PAD processes. So far, much of this works does not go beyond the trial‐and‐error stage, so that a general concept for successful deposition of PCCs by PAD is not yet available. This review revisits the fundamentals of the PAD process and its most important process parameters that were studied experimentally and in‐silico. It connects these with recent work on the combination of polymers and ceramics in the PAD process in order to highlight and evaluate the future of this field from a polymer science perspective.This article is protected by copyright. All rights reserved.

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Solvent‐Free Aerosol Deposition for Highly Luminescent and Thermally Stable Perovskite‐Ceramic Nanocomposite Film

Kim

Cho

Kim

et al. 2019

Adv Materials Inter

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diodes, [6][7][8][9] down-converting (DC) materials for white light, [10][11][12] lasers, [13,14] and photodetectors. [15][16][17] Particularly, allinorganic perovskite CsPbX 3 (X = Cl, Br, I) materials have been recognized as possessing advantageous optical properties such as narrow full width at half maximum (FWHM), high-photoluminescence (PL) quantum yield (QY), [10,[18][19][20] and higher stability than organometal halide perovskites. [8,[21][22][23][24] Therefore, the exceptional optoelectronic characteristics of the inorganic perovskite CsPbX 3 have made them an outstanding candidate for the development of full-color displays with unprecedented wide-color-gamut coverage. Recently, remarkable studies have been conducted on DC materials for commercial light emitting diode (LED) applications as luminophores, where perovskite nanoparticles were encapsulated with various polymers such as poly-methyl methacrylate (PMMA), [24] polyhedral oligomeric silsesquioxane, [25] Norland optical adhesive 63, [26] and poly-butyl methacrylate. [27] Furthermore, the intelligent film fabrication of perovskite nanocrystals (PeNCs) embedded in polymeric matrices resulted in a substantial expansion of the color gamut for display backlight and helped the films overcome issues with modification of the interface between PeNCs and the polymeric matrix. [28][29][30] However, insulating polymers as a host matrix are intrinsically vulnerable to thermal stress (generally over 150 °C). Particularly, long-term thermal stress causes softening distortion or deterioration in thermoplastic polymers such as PC, PMMA, and cycloolefin-copolymers. Dong et al. [30] indicated that thermoplastic polymers led to a rapid luminescence decay of PeNCs, due to their own thermal stability as the host matrix. Meanwhile, most polymer-free films of metal halide PeNCs have been fabricated using spin-coating, wet spray-coating, or centrifugal casting on rigid substrates, which showed tremendous PLQY and narrow FWHM for DC applications. [31][32][33][34] Nevertheless, spin-coated or centrifugal casting films of PeNCs on rigid substrates remain elusive for useful processability, which requires micropatterns, flexible films, large-area deposited films, and deposition on curved substrates.Herein, we report a novel deposited film of inorganic PeNCs embedded in the ceramic matrix of α-Al 2 O 3 by aerosol Luminescent perovskite structure has been used in a polymer-encapsulated form for display applications. However, insulating polymers as a host matrix are intrinsically vulnerable to thermal stresses which cause softening distortion or deterioration in thermoplastic polymers. Here, nanostructured CsPbBr 3 /Al 2 O 3 composite film is developed by aerosol deposition method. At first, CsPbBr 3 /Al 2 O 3 composite powders with bright and saturated green emission are synthesized. Then, the ceramic composite powder comprising monoclinic CsPbBr 3 nanocrystals supported on submicron α-Al 2 O 3 particles is successfully transformed to a film-type by aerosol deposition, which enabl...

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Hydrophobicity and transparency of Al2O3-based poly-tetra-fluoro-ethylene composite thin films using aerosol deposition

Cited by 17 publications

References 22 publications

Aerosol‐deposited Al₂O₃/PTFE hydrophobic coatings with adjustable transparency

Aerosol‐deposited Al₂O₃/PTFE hydrophobic coatings with adjustable transparency

Powder Aerosol Deposition and Polymers: Is There Hope for a Common Future?

Solvent‐Free Aerosol Deposition for Highly Luminescent and Thermally Stable Perovskite‐Ceramic Nanocomposite Film

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Hydrophobicity and transparency of Al2O3-based poly-tetra-fluoro-ethylene composite thin films using aerosol deposition

Cited by 17 publications

References 22 publications

Aerosol‐deposited Al2O3/PTFE hydrophobic coatings with adjustable transparency

Aerosol‐deposited Al2O3/PTFE hydrophobic coatings with adjustable transparency

Powder Aerosol Deposition and Polymers: Is There Hope for a Common Future?

Solvent‐Free Aerosol Deposition for Highly Luminescent and Thermally Stable Perovskite‐Ceramic Nanocomposite Film

Contact Info

Product

Resources

About

Aerosol‐deposited Al₂O₃/PTFE hydrophobic coatings with adjustable transparency

Aerosol‐deposited Al₂O₃/PTFE hydrophobic coatings with adjustable transparency