Sol–gel hybrid films based on organosilanes with long alkyl chains

Rădiţoiu, Valentin; Purcar, Violeta; Rădiţoiu, Alina; Raduly, Florentina Monica; Frone, Adriana Nicoleta; Anastasescu, Mihai; Stoica, M.; Alexandrescu, Elvira; Şomoghi, Raluca; Manea, Raluca; Ispas, Georgiana Cornelia; Wagner, Luminiţa Eugenia; Căprărescu, Simona

doi:10.1007/s11998-020-00359-8

Cited by 5 publications

(4 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Contributions of the C-H bonds and Si-C bonds were detected in the silica thin films and identified in the range of 2980-2853 cm −1 and 1280-1270 cm −1 , respectively. The presence of the Si-O group was detected at 910 cm −1 (bending vibrations) [27]. The presence of these peaks confirms the formation of a network structure inside the silica materials.…”

Section: Ftir Analysismentioning

confidence: 69%

Preparation and Characterization of Some Sol-Gel Modified Silica Coatings Deposited on Polyvinyl Chloride (PVC) Substrates

Purcar

Rădiţoiu

et al. 2020

Coatings

Self Cite

View full text Add to dashboard Cite

Transparent and antireflective coatings were prepared by deposition of modified silica materials onto polyvinyl chloride (PVC) substrates. These materials were obtained by the sol-gel route in acidic medium, at room temperature (25 °C), using different alkoxysilanes with various functional groups (methyl, vinyl, octyl or hexadecyl). Physicochemical and microstructural properties of resulted silica materials and of thin coatings were investigated through Fourier Transforms Infrared Spectroscopy (FTIR), UV-Vis spectroscopy, Thermal Gravimetric Analysis (TGA), Dynamic Mechanical Analysis (DMA), Atomic Force Microscopy (AFM) and ellipsometric measurements. Wetting behaviors of the silica coatings were evaluated by measurement of static contact angle against water. FTIR spectra of materials confirmed the high degree of cross-linking that result from the formation of the inorganic backbone through the hydrolysis and polycondensation reactions together with the formation of the organic network. These sol-gel silica coatings showed a reduction in the reflectance (10%) compared with uncoated PVC substrate. AFM reveals that the films are uniform, and adherent to the substrate, but their morphology is strongly influenced by the chemical composition of the coating matrices. These silica coatings can be useful for potential electronic and optical devices.

show abstract

Section: Ftir Analysismentioning

confidence: 69%

Preparation and Characterization of Some Sol-Gel Modified Silica Coatings Deposited on Polyvinyl Chloride (PVC) Substrates

Purcar

Rădiţoiu

et al. 2020

Coatings

Self Cite

View full text Add to dashboard Cite

show abstract

“…Its main advantages are its optical properties (a high refractive index, and transparency in the visible and NIR range) and its mechanical, physical and chemical properties (photocatalytic properties). The advantages of depositing TiO 2 coatings in the form of thin films have been demonstrated in many fields, including energy [ 11 ], photocatalysis [ 12 , 13 , 14 , 15 , 16 , 17 ], electronics [ 18 , 19 ], health [ 20 ], and optics [ 21 , 22 , 23 ]. Additionally, the coatings can be micro-nanostructured, thereby giving them new functionalities and properties, e.g., improved absorption efficiency [ 24 ], hydrophobicity and enhanced tribological properties [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Micro-Nanostructuring of Titanium Dioxide Films on the Photocatalytic Degradation of Formic Acid under UV Illumination

et al. 2022

View full text Add to dashboard Cite

Surface micro-nanostructuring can provide new functionalities and properties to coatings. For example, it can improve the absorption efficiency, hydrophobicity and/or tribology properties. In this context, we studied the influence of micro-nanostructuring on the photocatalytic efficiency of sol-gel TiO2 coatings during formic acid degradation under UV illumination. The micro-nanostructuring was performed using the UV illumination of microspheres deposited on a photopatternable sol-gel layer, leading to a hexagonal arrangement of micropillars after development. The structures and coatings were characterized using Raman spectroscopy, ellipsometry, atomic force microscopy and scanning electron microscopy. When the sol-gel TiO2 films were unstructured and untreated at 500 °C, their effect on formic acid’s degradation under UV light was negligible. However, when the films were annealed at 500 °C, they crystallized in the anatase phase and affected the degradation of formic acid under UV light, also depending on the thickness of the layer. Finally, we demonstrated that surface micro-nanostructuring in the form of nanopillars can significantly increase the photocatalytic efficiency of a coating during the degradation of formic acid under UV light.

show abstract

“…When the intramolecular condensation of functional groups in silane hydrolysis is significantly greater than intermolecular condensation, a cage-like structure is formed. 24…”

Section: Resultsmentioning

confidence: 99%

“…When the intramolecular condensation of functional groups in silane hydrolysis is signicantly greater than intermolecular condensation, a cage-like structure is formed. 24 Meanwhile, the peaks at about 1456 cm −1 and 1500 cm −1 belong to the stretching vibration of aromatic carbons in the phenolic resin. The sharp peak observed at about 1047 cm −1 is attributed to the stretching vibration of the C-N bond formed from the decomposition of hexamethylenetetramine.…”

Section: Design and Synthesismentioning

confidence: 99%

Constructing low-cost and high-strength ultra-low-density proppants based on the modification of activated carbon framework with in situ hydrolyzed silane

Zeng,

Wang,

Liu

et al. 2024

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

Sol–gel hybrid films based on organosilanes with long alkyl chains

Cited by 5 publications

References 40 publications

Preparation and Characterization of Some Sol-Gel Modified Silica Coatings Deposited on Polyvinyl Chloride (PVC) Substrates

Preparation and Characterization of Some Sol-Gel Modified Silica Coatings Deposited on Polyvinyl Chloride (PVC) Substrates

Influence of the Micro-Nanostructuring of Titanium Dioxide Films on the Photocatalytic Degradation of Formic Acid under UV Illumination

Constructing low-cost and high-strength ultra-low-density proppants based on the modification of activated carbon framework with in situ hydrolyzed silane

Contact Info

Product

Resources

About