Characteristics of Thin Film of Nano-Hybrid Synthesized from Acrylic Resin and Colloidal Silca-Silane Sol

2006 ◽  
Vol 510-511 ◽  
pp. 218-221
Author(s):  
Dong Pil Kang ◽  
Hoy Yul Park ◽  
Young Taec Kang ◽  
Moon Kyong Na ◽  
Hee Woong Lee
Keyword(s):  
Thin Films ◽  
Contact Angle ◽  
Sol Gel ◽  
Thermal Dissociation ◽  
Acrylic Resin ◽  
Insulation Property ◽  
Inorganic Hybrid ◽  
Aluminum Sheets ◽  
Dissociation Temperature ◽  
Surface Contact Angle

Organic-inorganic hybrid blends were prepared in variation with the ratio of sol solution to urethaneacrylic resin. Such sol solutions were synthesized from colloidal silica (CS)/ methyltrimethoxysilane(MTMS)/vinyltrimethoxysilane(VTMS) by sol-gel reaction through two step reactions. Thin films of organic-inorganic hybrid blends were prepared using spin coater on the glass and aluminum sheets. In order to understand surface properties of thin films, contact angle and roughness were measured. Surface contact angle and roughness of thin films increased as the amount of sol solution increased. Thermal dissociation temperature of thin films was observed using TGA. Thin films were stable until 270 oC. Thermal dissociation temperature of thin films improved with increasing sol solution. In order to observe insulation property of thin films, electrical resistance measurements were performed. Surface and volume resistance of thin films increased as the amount of sol solution increased.

Properties of Organic/Inorganic Hybrid Material Synthesized from Acrylic Resin and Silane-Terminated CS

2007 ◽  
Vol 544-545 ◽  
pp. 809-812 ◽  
Author(s):  
Young Taec Kang ◽  
Jin Kook Lee ◽  
Dong Pil Kang
Keyword(s):  
Thin Film ◽  
Contact Angle ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Acrylic Resin ◽  
Thermal Polymerization ◽  
Electric Resistivity ◽  
Hybrid Thin Film ◽  
Inorganic Hybrid ◽  
Aluminum Sheets

Organic/inorganic hybrid materials synthesized from acrylic resin and silane-terminated colloidal silica(CS). The silane-terminated CS was prepared in variation with the kind of silane to CS. The CS treated with methyltrimethoxysilane(MTMS) and then treated with vinyl trimethoxysilane(VTMS), 3-glycidoxypropyltrimethoxysilane(ATMS) or 3-methacyloxypropyl trimethoxysialne(ETMS) by sol-gel method, respectively. The variation of silane-terminated CS and acrylic resin were hybridized by thermal-polymerization. Thin films of organic/inorganic hybrid materials were prepared using spin coater on the glass and aluminum sheets. Their contact angle, surface electric resistivity and thermal resistance improved with the amount of silaneterminated CS. The contact angle and surface electric resistivity of hybrid thin film with VTMS were enhanced. The surface of hybrid thin film with VTMS was homogeneous through FE-SEM.

Hydrophilic and Photocatalytic Performances of Y-Doped Titanium Dioxide Thin Films

2013 ◽  
Vol 651 ◽  
pp. 103-108
Author(s):  
Jun Du ◽  
Yan Bin Yu ◽  
Jing Jing Huang ◽  
Hua Qiang Fu ◽  
Bu Hui Li ◽  
...  
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Contact Angle ◽  
Photocatalytic Activity ◽  
Calcination Temperature ◽  
Crystalline Phase ◽  
Sol Gel ◽  
Tetrabutyl Titanate ◽  
Continuous Increase ◽  
Photocatalytic Performances

Pure and Y-doped TiO2 thin films are prepared on glass by sol-gel method. Tetrabutyl titanate was used as Ti precursors. The chemical composition, structure and properties of TiO2 thin films are characterized by XRD, FT-IR, UV-Vis and Optical Contact Angle Measuring Instrument. Their photocatalytic performances were studied in detail by the methylene blue degradation model. The results show that the crystalline phase of Y2Ti2O7 is formed and the phase transformation from anatase to rutile is restrained when Y is doped in the TiO2 thin films. However, with the continuous increase in calcination temperature, its photocatalytic activity decreases, because the anatase will transform to the rutile. The proper amount of Y doping will cause the lattice to expand, the new defects will form and the smaller band-gap energy will be revealed. Thus, the absorption ability toward the ultraviolet can be improved, the redshift of the absorption band can also be found. As the results of it, the hydrophilicity and photocatalytic efficiency can improved. Furthermore, the photocatalytic activity increases with the hydrophilicity. When the calcination temperature of thin films is 450oC and the Y-doping is 0.3%, the main crystalline phase of the samples is the anatase, the contact angle is only 13.7o and the degradation ratio of methylene blue reached 98.84%.

scholarly journals Improving Surface Hydrophobicity by Microrolling-Based Texturing

2016 ◽  
Vol 4 (3) ◽  
Author(s):  
Man-Kwan Ng ◽  
Ishan Saxena ◽  
Kornel F. Ehmann ◽  
Jian Cao
Keyword(s):  
Contact Angle ◽  
Volume Ratio ◽  
Surface Hydrophobicity ◽  
Contact Angles ◽  
Forming Process ◽  
Aluminum Sheets ◽  
Pile Up ◽  
Surface Contact Angle ◽  
Hierarchical Features ◽  
Aluminum Surfaces

A two-pass microrolling-based texturing (μRT) process was utilized to improve the hydrophobicity of aluminum surfaces. Square micropillars were fabricated on aluminum sheets by two mutually orthogonal forming passes by a roller pretextured with microgrooves. Subsequently, the droplet contact angle was measured to evaluate the hydrophobicity of the surface. Results show that surfaces with μRT-imprinted textures have higher contact angles than nontextured surfaces indicating improved hydrophobicity. Furthermore, the process has led to the creation of hierarchical valleylike features on top of each of the micropillars caused by the pile-up effect during the forming process. It was hypothesized that such hierarchical features positively contribute to the improved hydrophobicity of the surface. This hypothesis was validated by testing surfaces with a similar hierarchical textured pattern produced by laser-induced plasma micromachining (LIPMM). The effects of various aspects of texture geometry including surface area-to-volume ratio and groove aspect ratio on the surface contact angle and the anisotropy of the contact angles were investigated.

scholarly journals Transparent and conductive polysiloxanes/PEDOT:PSS nanocomposite thin films with a “water-impermeable” property to significantly enhance stability of organic–inorganic hybrid solar cells

RSC Advances ◽  
2015 ◽  
Vol 5 (13) ◽  
pp. 9650-9657 ◽  
Author(s):  
Heming Wang ◽  
Vikas Kumar
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Sol Gel ◽  
Scratch Resistance ◽  
Hybrid Solar Cells ◽  
Inorganic Hybrid ◽  
High Transparency ◽  
Nanocomposite Thin Films

Novel sol–gel-derived polysiloxanes/PEDOT:PSS nanocomposite thin films were developed with high transparency, conductivity, and superior water- and scratch-resistance.

All Solution-Processed Quintuple-Layer Organic Light-Emitting Diodes Containing Organic-Inorganic Hybrid Active Layers Fabricated by Sol-Gel Method

2018 ◽  
Vol 777 ◽  
pp. 113-120
Author(s):  
Yusuke Jitsui ◽  
Naoki Ohtani
Keyword(s):  
Thin Films ◽  
Active Layer ◽  
Light Emitting Diodes ◽  
Sol Gel ◽  
Organic Light Emitting Diodes ◽  
Inorganic Hybrid ◽  
Light Emitting ◽  
Gel Method ◽  
Organic Layers ◽  
Organic Light

Organic-inorganic hybrid thin films were fabricated using the sol-gel method and applied to multi-layer organic light-emitting diodes (OLEDs) as an active layer. A polymer emissive material poly (9,9-dioctyl-fluorene-co-N-4-butylphenyl-diphenylamine) (TFB) was solved in a sol-gel reaction accelerator perhydropolysilazane (PHPS). The PHPS solution turned into SiO2 by humidity treatment. Thus, the TFB:PHPS solution became SiO2 thin films in which the organic emissive material TFB was dispersed. All the organic layers of OLEDs can be fabricated using solution-process because the organic-inorganic hybrid active layer is not soluble with the adjacent organic layers. Consequently, we successfully fabricated quintuple-layer OLEDs consisting of the following five organic films: hole-injection, hole-transporting, active (organic-inorganic hybrid) electron-transporting, and electron-injection layers. Electroluminescence (EL) was successfully observed.

Photocatalytic and Self-Cleaning Properties of TiO2-Cu Thin Films on Glass Substrate

2012 ◽  
Vol 152-154 ◽  
pp. 409-413 ◽  
Author(s):  
Weerachai Sangchay ◽  
Lek Sikong ◽  
Kalayanee Kooptarnond
Keyword(s):  
Thin Films ◽  
Contact Angle ◽  
Uv Irradiation ◽  
Sol Gel ◽  
Dip Coating ◽  
Glass Slides ◽  
Coating Method ◽  
Small Contact Angle ◽  
Self Cleaning ◽  
Dip Coating Method

TiO2-Cu thin films containing 0 to 1%Cu coated on glass slides were prepared by sol gel-dip coating method. The prepared thin films were synthesized at the temperature of 400 ◦C for 2 h with a heating rate of 10◦C/min. The microstructures of synthesized TiO2-Cu thin films were characterized by XRD, FT-IR and SEM. The photocatalytic activities of TiO-2Cu thin films were tested using methylene blue (MB) solution under UV irradiation. Finally, the self-cleaning property was evaluated by means of contact angle of water droplet on the films. The results show all samples have the thickness in range of 1 um and surfaces are dense with a large surface area. It can be noted that TiO2-1.0Cu thin films were found to give the highest photocatalytic efficiency and exhibited self-cleaning effect (small contact angle, 17°) under UV irradiation.

Multifunctional nanocomposite transparent UV-blocking films sythesized by sol-gel process for optical, automotive and aeronautic applications

2005 ◽  
Vol 901 ◽  
Author(s):  
Phani Ratna Ayalasomayajula ◽  
S. Santucci
Keyword(s):  
Thin Films ◽  
Contact Angle ◽  
Morphological Changes ◽  
Sol Gel ◽  
Chemical Properties ◽  
Contact Angles ◽  
Nanocomposite Films ◽  
Energy Materials ◽  
Water Contact ◽  
Uv Blocking

AbstractDevelopment of UV blocking thin films with effective cut-off features with steep edges and high transmission in the visible and IR region have been developed. The unique optical, mechanical and chemical properties of silica and ceria nanocomposites with surface functional groups making them most promising candidate for applications in opto-electronic, automotive, and aeronautic industries. On the other hand, highly hydro and oleophobic films are being actively considered in optical, automotive and aeronautic industries to increase adhesion and scratch, abrasion resistance properties. In order to fill the gap, and fulfill the requirements to meet both ends, it could be proved that morphological changes in the nanometer range influences the water contact angles and their hystersis of low energy materials. Nanocomposite films of SiO2 and CeO2 with surface functionalisation with decafluorooctly-triethoxy silane itself forms nano-hemispheres (similar to lotus leaf) at and above 100°C favoring an increase in water contact angle from 122° (25°C) to 145°(400°C). The structural, optical, and hydrophobic properties have been examined by employing X-ray diffraction, UV-visible spectroscopy, contact angle techniques, respectively. The cut-off behavior of the deposited and annealed nanocomposite thin films have been tuned by varying different amounts of CeO2 in SiO2.

Study on acrylic resin/titania organic–inorganic hybrid materials prepared by the sol–gel process

Polymer ◽  
2004 ◽  
Vol 45 (9) ◽  
pp. 2967-2976 ◽  
Author(s):  
Mingna Xiong ◽  
Bo You ◽  
Shuxue Zhou ◽  
Limin Wu
Keyword(s):  
Hybrid Materials ◽  
Sol Gel ◽  
Acrylic Resin ◽  
Inorganic Hybrid ◽  
Sol Gel Process
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