Engineering of superhydrophobic silica microparticles and thin coatings on polymeric films by ultrasound irradiation

Iline-Vul, Taly; Bretler, Sharon; Cohen, Sarit; Perelshtein, Ilana; Perkas, Nina; Gedanken, Aharon; Margel, Shlomo

doi:10.1016/j.mtchem.2021.100520

Cited by 13 publications

(13 citation statements)

References 62 publications

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“…The PS covered polymeric film is then coated with a layer of silica nanoparticles (SiO 2 NPs) resulting in a core–shell coating with a raspberry-like morphology that is fixated to the surface of the film. Silica is a very popular inorganic nanomaterial that can be applied onto many surfaces for improving strength, flexibility, and durability among other characteristics. − …”

Section: Introductionmentioning

confidence: 99%

In Situ Coatings of Polymeric Films with Core Polystyrene, Core–Shell Polystyrene/SiO₂, and Hollow SiO₂ Micro/Nanoparticles and Potential Applications

Hayne

Margel

2023

ACS Omega

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In many industrial settings, films of polymers such as polypropylene (PP) and polyethylene terephthalate (PET) require surface treatment due to poor wettability and low surface energy. Here, a simple process is presented to prepare durable thin coatings composed of polystyrene (PS) core, PS/SiO 2 core−shell, and hollow SiO 2 micro/nanoparticles onto PP and PET films as a platform for various potential applications. Corona-treated films were coated with a monolayer of PS microparticles by in situ dispersion polymerization of styrene in ethanol/2-methoxy ethanol with polyvinylpyrrolidone as stabilizer. A similar process on untreated polymeric films did not yield a coating. PS/SiO 2 core−shell coated microparticles were produced by in situ polymerization of Si(OEt) 4 in ethanol/water onto a PS-coated film, creating a raspberry-like morphology with a hierarchical structure. Hollow porous SiO 2 -coated microparticles onto a PP/PET film were formed by in situ dissolution of the PS core of the coated PS/SiO 2 particles with acetone. The coated films were characterized by E-SEM, FTIR/ATR, and AFM. These coatings may be used as a platform for various applications, e.g. magnetic coatings onto the core PS, superhydrophobic coatings onto the core−shell PS/SiO 2 , and solidification of oil liquids within the hollow porous SiO 2 coating.

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Section: Introductionmentioning

confidence: 99%

In Situ Coatings of Polymeric Films with Core Polystyrene, Core–Shell Polystyrene/SiO₂, and Hollow SiO₂ Micro/Nanoparticles and Potential Applications

Hayne

Margel

2023

ACS Omega

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“…Such hydrophobic substrates are achieved by coating with water-proof materials or via laminates within different textile structures (e.g., Gore-Tex) . However, conventional water-repellent coatings, as well as many of the best-performing literature reports to date, often use fluorinated compounds, which can persist in the environment (i.e., they are poorly degradable), and pose cytotoxicity issues. − As such, safer fluorine-free alternatives need to be fully explored and better understoodboth silica and copper oxide (CuO) nanoparticles (NP) have garnered interest in this regard …”

Section: Introductionmentioning

confidence: 99%

Sonochemical Routes to Superhydrophobic Soft Matter Coatings: Comparing Silica and Copper Oxide Coatings on Polyester Fabric

Ming

Chan

Mutalik

et al. 2022

Ind. Eng. Chem. Res.

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Reliable and long-lasting water repellency, ideally based on fluorine-free additives, is a desired utility in functional textiles, e.g., for outdoor active wear, workwear, and even protective medical garments. To date, such coating treatments have usually been accomplished by pad-dry-cure, electrolysis, or similar methods that tend to be time-consuming and often yield unsatisfactory coating results. In this study, hydrophobic-coated polyester substrates were prepared using a sonochemical coating process. Comparisons were made between the performances and associated morphological variations of amorphous nano-dimensional silica versus nanocrystalline cupric oxide hydrophobic coatings, which were separately made and successfully loaded, via a random distribution, onto mesoporous polyester-woven fabric substrates. Shorter sonication times seem to allow for retention of preformed morphologies into the subsequent coating patterns. The nanocomposite coatings and their components were characterized using X-ray diffraction (XRD), attenuated total reflectance-infrared Fourier transform infrared (ATR-FTIR), SEM, scanning electron microscope (SEM), UV–vis, dynamic light scattering (DLS), and Raman spectroscopy measurements. Almost all coatings displayed highly hydrophobic static water contact angle valuesfor CuO, these values further increased with time, a rarely reported aging effect thought due to the presence of mixed oxides that likely formed in the coating due to the spallative ultrasonic approach. In addition, the efficacy of these hydrophobic semipermeable fabrics to hexane–water mixture separations, with varying concentrations of Na2SO4, was found to be >99% for optimized membranes, with an associated permeation flux of ∼5.9 ± 2 L m–2 h–1, a water content of ∼0%, and a salt rejection capability of ∼94%. Thus, non-fluorine-containing sonochemical coating formulations and processes are ideal in the coating of soft matter, polymeric textiles.

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“…Currently, the sol-gel method has been regarded as the most common method for preparing PI/SiO 2 nanocomposites. However, during the sol-gel reaction process, a certain amount of water and catalyst need to be added, which may cause the residue of some impurities and affect the performance of the film [11][12][13][14]. For improving the process and obtain materials with better comprehensive performance, the in situ polymerization method came into being.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Silane Coupling Agent on the Texture and Properties of In Situ Synthesized PI/SiO2 Nanocomposite Film

et al. 2022

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PI/SiO2 composite films have been prepared by using in situ polymerization. The influences of the dosage of silane coupling agent (KH-560) on the structure and performance of PI/SiO2 composite film have been investigated. The results show that in the components without KH-560, the addition of SiO2 decreases the transmittance of the sample. Compared to the same SiO2 doping amount, the transmittance in the visible light range of the sample using KH-560 is higher than that of the sample without KH-560. After adding KH-560, the tensile strength, the elastic modulus the elongation at break of the sample have largely changed. The thermal stability and the ability to resist ultraviolet radiation of the composite film first increases and then decreases. Furthermore, the optimal dosage of KH-560 is 3%. Moreover, the addition of KH-560 has little effect on the transmittance of the PI/SiO2 composite films before and after UV irradiation.

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Engineering of superhydrophobic silica microparticles and thin coatings on polymeric films by ultrasound irradiation

Cited by 13 publications

References 62 publications

In Situ Coatings of Polymeric Films with Core Polystyrene, Core–Shell Polystyrene/SiO₂, and Hollow SiO₂ Micro/Nanoparticles and Potential Applications

In Situ Coatings of Polymeric Films with Core Polystyrene, Core–Shell Polystyrene/SiO₂, and Hollow SiO₂ Micro/Nanoparticles and Potential Applications

Sonochemical Routes to Superhydrophobic Soft Matter Coatings: Comparing Silica and Copper Oxide Coatings on Polyester Fabric

The Effect of Silane Coupling Agent on the Texture and Properties of In Situ Synthesized PI/SiO2 Nanocomposite Film

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Engineering of superhydrophobic silica microparticles and thin coatings on polymeric films by ultrasound irradiation

Cited by 13 publications

References 62 publications

In Situ Coatings of Polymeric Films with Core Polystyrene, Core–Shell Polystyrene/SiO2, and Hollow SiO2 Micro/Nanoparticles and Potential Applications

In Situ Coatings of Polymeric Films with Core Polystyrene, Core–Shell Polystyrene/SiO2, and Hollow SiO2 Micro/Nanoparticles and Potential Applications

Sonochemical Routes to Superhydrophobic Soft Matter Coatings: Comparing Silica and Copper Oxide Coatings on Polyester Fabric

The Effect of Silane Coupling Agent on the Texture and Properties of In Situ Synthesized PI/SiO2 Nanocomposite Film

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Product

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In Situ Coatings of Polymeric Films with Core Polystyrene, Core–Shell Polystyrene/SiO₂, and Hollow SiO₂ Micro/Nanoparticles and Potential Applications

In Situ Coatings of Polymeric Films with Core Polystyrene, Core–Shell Polystyrene/SiO₂, and Hollow SiO₂ Micro/Nanoparticles and Potential Applications