Fabrication of antireflective antifogging nano-porous silica thin film on glass substrate by layer-by-layer assembly method

Eshaghi, Akbar; Mojab, Mohammadreza

doi:10.1016/j.jnoncrysol.2014.09.017

Cited by 34 publications

(15 citation statements)

References 22 publications

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“…Tuning the wetting properties of a substrate through surface engineering − is an effective approach to the creation of antifogging (AF), − antireflective (AR), − ,− or self-cleaning ,,, surfaces. Both superhydrophobic (contact angle of >150°) and superhydrophilic (contact angle of <5°) , coatings can imbue a surface with AF properties but for different reasons. ,,,, Superhydrophobic surfaces minimize the adhesion between water droplets and substrate surface, thereby preventing water droplets from remaining on the surface.…”

Section: Introductionmentioning

confidence: 99%

Zeolite-Based Antifogging Coating via Direct Wet Deposition

Hsu

Huang

et al. 2019

Langmuir

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Zeolites are strongly hydrophilic materials that are widely used as water adsorbents. They are also promising candidates for antifogging coatings; however, researchers have yet to devise a suitable method for coating glass substrates with zeolite-based films. Here, we report on a direct wet deposition technique that is capable of casting zeolite films on glass substrates without exposing the glass to highly basic solutions or the vapors used in zeolite synthesis. We began by preparing cast solutions of pure silica zeolite MFI synthesized in hydrothermal reactions of various durations. The solutions were then applied to glass substrates via spin-on deposition to form zeolite films. The resulting zeolite MFI thin films were characterized in terms of transmittance to visible light, surface topography, thin film morphology, and crystallinity. Wetting and antifogging properties were also probed. We found that hydrophilicity and antifogging capability increased with the degree of thin film crystallinity. We also determined that the presence of the amorphous silica in the thin films is critical to transparency. Fabricating high-performance zeolite-based antifogging coatings requires an appropriate composition of zeolite crystals and amorphous silica.

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Section: Introductionmentioning

confidence: 99%

Zeolite-Based Antifogging Coating via Direct Wet Deposition

Hsu

Huang

et al. 2019

Langmuir

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“…). Eshaghi and Mojab () also reported the principle relationship between surface roughness and contact angle which was cos θ * = r cos θ , where r is the roughness parameter, θ * is the apparent water contact angle on a rough surface and θ is the young contact angle induced only by chemical surface interaction.…”

Section: Resultsmentioning

confidence: 99%

“…A drop of deionized water was injected on the surface using a 1.0 µL microinjector and the contact angle could be obtained. The water contact angle was averaged from five measurements (Eshaghi and Mojab ).…”

Section: Methodsmentioning

confidence: 99%

“…() fabricated the biomimetic high performance antireflective and antifogging film by spin‐coating. Eshaghi and Mojab () prepared the antifogging silica nanoporous thin film on glass substrates by layer‐by‐layer assembly method. Although coating cannot meet the demand of long lasting antifogging performance and the antifogging agents are vulnerable.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and Characterization of Polyglycerol Fatty Acid Esters/Polyethylene Antifogging Film

Wei

Yang

et al. 2016

J Food Process Engineering

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The antifogging polyglycerol fatty acid esters (PGFE)/polyethylene (PE) film with polyethylene wax emulsions (WE1) as a dispersant was fabricated using twin-screw extruder and then extrusion blow molding. The study was conducted to investigate the influence that different levels of PGFE on the antifogging performance, mechanical, optical, thermostability and cross-section microstructures of PGFE/PE film. The modified polymer film had been characterized by contact angle measurement (CAM), thermogravimetric analysis, Fourier transform infrared spectroscopy and scanning electron microscopy. The results revealed that WE1 and PGFE could mix evenly with PE resin. Compared with 100% low-density polyethylene film, PGFE incorporation improved antifogging performance, hydrophilicity, haze and thermostability, however, decreased light transmittance and tensile strength. When the content of PGFE is 2%, PGFE/PE film has a long lasting antifogging performance, high-quality mechanical stability and light transmittance. It has a great potential to be applied in food packaging. PRACTICAL APPLICATIONSBecause of the utilization as antifogging, antistatic additive, lubricant and plasticizer of polyglycerol fatty acid esters (PGFE) in synthetic resin and plastics processing, it is receiving much more attention. Investigation of the antifogging performance in PGFE in polymer matrix has recently been considered. Study of the antifogging and physical parameters is one of the ways to find the influence of antifoggant on the antifogging, mechanical and structural properties of the films. In this work, high-temperature antifogging property, water contact angle, morphology of water droplets on the film surface, mechanical and optical behaviors of film samples affected by the concentration of PGFE were studied. Investigation of scanning electron microscopy and Fourier transform infrared spectroscopy in the film allows a better understanding of film structure in the process of film fabrication. More importantly, the study solves the uneven distribution of antifoggant in the polymer resin.

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“…While acid catalyzed coatings exhibit a linear transmittance behavior and transmittance values near uncoated glass of about 90%, base catalyzed coatings exhibit even higher transmittance values compared to uncoated glass of about 97%, especially in the visible light range with a wavy behavior. It is believed that the nanoporous structure of the base catalyzed coatings caused the wavy transmission structure and the increase in the transmission by decreasing light reflection, because of the difference in the light scattering from the nanoporous and dense media [20].…”

Section: The Chemical Composition Of Base Catalyzedmentioning

confidence: 99%

Asit ve Baz Kataliz Sol-Jel Daldırmalı Kaplama Tekniği ile Üretilen SiO2 Kaplamaların İncelenmesi

Tavşanoğlu¹

2019

Deu Muhendislik Fakultesi Fen Ve Muhendislik

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Present study deals with the effect of acid and base catalysis on SiO2 coating properties that were synthesized by sol-gel dip coating technique. Microstructural properties of the coatings were characterized by SEM and EDS was used to determine the coating composition. Spectrophotometer has been used to measure the optical properties of the coatings. The results demonstrated that SiO2 coatings deposited by both acid and base catalysis sol-gel dip coating technique were homogeneous and well-adherent. Acid catalyzed SiO2 coatings resulted with dense and smooth surface morphologies whereas base catalyzed SiO2 coatings had nanoporous structure with nanovoids ranging between 15-30 nm. According to the optical analyses, SiO2 coatings have very high transmittance values demonstrating that they are highly transparent especially in the visible light range.

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Fabrication of antireflective antifogging nano-porous silica thin film on glass substrate by layer-by-layer assembly method

Cited by 34 publications

References 22 publications

Zeolite-Based Antifogging Coating via Direct Wet Deposition

Zeolite-Based Antifogging Coating via Direct Wet Deposition

Fabrication and Characterization of Polyglycerol Fatty Acid Esters/Polyethylene Antifogging Film

Asit ve Baz Kataliz Sol-Jel Daldırmalı Kaplama Tekniği ile Üretilen SiO2 Kaplamaların İncelenmesi

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