scholarly journals Preparation and Characterization of Organic-inorganic Hybrid Composite Film with Plate-shaped Alumina by Electrophoretic Deposition as a Function of Aging Time of Sol-Gel Binder

2015 ◽  
Vol 52 (5) ◽  
pp. 366-373
Author(s):  
Doo Hwan Kim ◽  
Hee Jeong Park ◽  
Jinsub Choi ◽  
Hyung Mi Lim
Keyword(s):  
Composite Film ◽  
Aging Time ◽  
Electrophoretic Deposition ◽  
Hybrid Composite ◽  
Sol Gel ◽  
Inorganic Hybrid

Synthesis and characterization of organic–inorganic hybrid materials prepared by sol–gel and containing ZnxCd1−xS nanoparticles prepared by a colloidal method

2013 ◽  
Vol 144 ◽  
pp. 203-211 ◽  
Author(s):  
Luis F.F.F. Gonçalves ◽  
Carlos J.R. Silva ◽  
Fehmida K. Kanodarwala ◽  
John A. Stride ◽  
Mário R. Pereira ◽  
...  
Keyword(s):  
Hybrid Materials ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Inorganic Hybrid ◽  
Colloidal Method

Development and characterization of novel organic–inorganic hybrid sol–gel films

2014 ◽  
Vol 26 (7) ◽  
pp. 725-733 ◽  
Author(s):  
D. Duraibabu ◽  
T. Ganeshbabu ◽  
P. Saravanan ◽  
S. Ananda Kumar
Keyword(s):  
Sol Gel ◽  
Inorganic Hybrid ◽  
Sol Gel Films

Preparation and Electrophoretic Deposition of an Yttrium Silicate Precursor Sol

2009 ◽  
Vol 412 ◽  
pp. 267-272 ◽  
Author(s):  
Jana Grosse-Brauckmann ◽  
Günter Borchardt ◽  
Christos Argirusis
Keyword(s):  
Electrophoretic Deposition ◽  
Sol Gel ◽  
Constant Current ◽  
Particle Charge ◽  
Yttrium Silicate ◽  
Micro Cracks ◽  
Sol Gel Process ◽  
Hydrolysis Of ◽  
Controlled Hydrolysis

. In the present work we used the sol-gel process to prepare Y2SiO5 precursor sols suitable for electrophoretic deposition (EPD). The sol synthesis was performed through the controlled hydrolysis of alkoxide solutions of tetraethoxysilane and yttriumoxoisopropoxide. During sol development emphasis was put on characterization of particles size and zeta potential of the formed aggregates. We succeeded in synthesizing a clear sol containing polymeric aggregates with acceptable particle charge. The electrophoretic deposition on glassy carbon or C/C-SiC slabs led to homogenous layers. At low sol concentrations micro cracks in the deposited layers were observed whereas higher concentrations led to thin and dense layers. During constant current EPD a constant voltage was recorded indicating that the deposited layer does not lead to an increase in resistivity in this kind of EPD system.

Organic–inorganic hybrid thin films based in HfO2 nanoparticles as dielectric for flexible electronics

2014 ◽  
Vol 92 (7/8) ◽  
pp. 806-812 ◽  
Author(s):  
R. Ambrosio ◽  
O. Arciniega ◽  
A. Carrillo ◽  
M. Moreno ◽  
A. Heredia ◽  
...  
Keyword(s):  
Band Gap ◽  
Hybrid Material ◽  
Flexible Electronics ◽  
Photoelectron Spectroscopy ◽  
Hafnium Oxide ◽  
Optical Band Gap ◽  
Low Cost ◽  
Sol Gel ◽  
Inorganic Hybrid

In this work the synthesis and characterization of an organic–inorganic hybrid composite film based on hafnium oxide (HfO2) and polyvinylpyrrolidone (PVP) with dielectric properties is presented. These films were prepared using the sol-gel process adjusting the chemical composition to tailor the material properties, such as the dielectric and the optical band gap. The HfO2 was obtained by the hydrolysis of hafnium chloride (HfCl4) under catalysis of ethanol and deionized water, later the PVP was subsequently added to complete the hydrolysis. Finally the films were dried at 150 °C. The structural characterization of the hybrid material showed a hafnium nanoparticle size around 100 nm into the polymer matrix. The chemical structure and the high purity of the hybrid material were corroborated by X-ray photoelectron spectroscopy measurements, which showed the bounding of HfO2–PVP. The electrical characterization demonstrated that the nanostructured materials with hafnium nanoparticles improve the dielectric constant in the films with values around k = 18.5. The optical band gap, Eo, was obtained from 4 to 5.7 eV. These characteristics in our hybrid material are very promising for flexible electronics applications with the advantage of its low temperature, thermal stability, and low cost process of deposition.

Electrophoretic deposition of sol–gel coating comprising alumina and boehmite for organic–inorganic hybrid film

2016 ◽  
Vol 6 (2) ◽  
pp. 127-136
Author(s):  
Hee Jeong Park ◽  
Doo Hwan Kim ◽  
Younghee Kim ◽  
Hyung Mi Lim
Keyword(s):  
Electrophoretic Deposition ◽  
Hybrid Film ◽  
Sol Gel ◽  
Inorganic Hybrid

scholarly journals Insulating Thermal and Water-Resistant Hybrid Coating for Fabrics

Coatings ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 72 ◽  
Author(s):  
Simona Ortelli ◽  
Anna Luisa Costa
Keyword(s):  
Thermal Stability ◽  
Sol Gel ◽  
Hybrid Coating ◽  
Inorganic Hybrid ◽  
Tio2 Nps ◽  
Nonwoven Fabrics ◽  
Burn Out ◽  
Sol Gel Process ◽  
Coated Fabrics

Organic–inorganic hybrid (ceramer) coatings were synthesized and deposited on the polyester nonwoven fabrics through the sol–gel process. This promoted the formation of an insulating barrier that was able to enhance the thermal stability and the hydrophobicity of fabrics. The hybrid phase is made of an organic network arising from different alkoxysilane precursors (trimethoxymethylalkoxysilane (TMEOS), 3-aminopropyl-trimethoxyalkoxysilane (APTMS), and tetraethylorthosilicate (TEOS)) and inorganic phase made of titanium dioxide TiO2 nanoparticles (NPs) and, in some cases, coated by P-based compound. The characterization of hybrid phase at liquid (size distribution and zeta potential of dispersed nanoparticles), dried state (crystalline phase, thermogravimetric (TGA), and Fourier transform infrared spectroscopic (FTIR) analyses), and on deposited coatings (contact angle, burn-out tests) aimed to find a correlation between the physicochemical properties of ceramer and functional performances of coated fabrics (thermal stability and hydrophobicity). The results showed that all ceramer formulations were able to improve the char formation after burn-out, in particular the highest thermal stability was obtained in the presence of TMEOS precursor and TiO2 NPs coated by P-based compound, which also provided the highest hydrophobicity. In conclusion, we presented an environmentally friendly and easily scalable process for the preparation of ceramer formulations capable of being formed into transparent, thermal-resistant, and hydrophobic fabric coatings, whose functions are extremely challenging for the textile market.

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