Hydrophobic Sol-Gel Based Self-cleaning Coating for Photovoltaic Panels

2020 ◽  
pp. 753-765
Author(s):  
Siti Nur Nashya Azlika Hamidon ◽  
Amirjan Nawabjan ◽  
Ahmad Sharmi Abdullah ◽  
Siti Maherah Hussin
Keyword(s):  
Sol Gel ◽  
Photovoltaic Panels ◽  
Self Cleaning

Hydrophobic sol–gel coatings based on polydimethylsiloxane for self-cleaning applications

2015 ◽  
Vol 86 ◽  
pp. 855-862 ◽  
Author(s):  
Divya Kumar ◽  
Xinghua Wu ◽  
Qitao Fu ◽  
Jeffrey Weng Chye Ho ◽  
Pushkar D. Kanhere ◽  
...  
Keyword(s):  
Sol Gel ◽  
Self Cleaning

Preparation of TiO2–SiO2 Hybrid Nanosols Coated Flame-Retardant Polyester Fabric Possessing Dual Contradictory Characteristics of Superhydrophobicity and Self Cleaning Ability

2020 ◽  
Vol 20 (3) ◽  
pp. 1780-1789 ◽  
Author(s):  
Priyanka Katiyar ◽  
Shraddha Mishra ◽  
Anurag Srivastava ◽  
N. Eswara Prasad
Keyword(s):  
Electron Microscopy ◽  
Contact Angle ◽  
Flame Retardant ◽  
Protective Clothing ◽  
Sol Gel ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Water Contact ◽  
Vis Spectroscopy ◽  
Self Cleaning

TiO2, SiO2 and their hybrid nanocoatings are prepared on inherent flame retardant textile substrates from titanium(IV)iso-proproxide (TTIP) and tetraethoxysilane (TEOS) precursors using a sol–gel process followed by hydrothermal treatment. The coated samples are further functionalized by hexadecyltrimethoxysilane (HDTMS) to impart superhydrophobicity. Sample characterization of the nanosols, nanoparticles and coated samples are investigated using, X-ray diffractometer, transmission electron microscopy, scanning electron microscopy, UV-Vis spectroscopy, contact angle measurement. Stain degradation test under mild UV irradiation shows almost 54% degradation of coffee stain within 4 hours measured by Spectrophotometer. UV-Vis Absorption Spectroscopy demonstrates complete degradation of methyl orange colorant within 3 hours. Hybrid nanosol coated and HDTMS modified inherent flame retardant polyester surfaces show apparent water contact angle as ~145°, which is much closer to proximity of superhydrophobic surfaces. Thus, the novelty of present work is, by using sol–gel technique, a bi-functional textile surface has been developed which qualifies the very specific requirements of protective clothing like self-cleaning property (imparted by TiO2 nanoparticles) and superhydrophobicity (imparted by SiO2 nanoparticles and further surface modification by HDTMS), which are entirely contradictory in nature, in a single fabric itself. Thus developed textile surfaces also possess the other attributes of protective clothing like flame retardancy and air permeability.

scholarly journals Preparation of Transparent and Antireflective Silica Thin Coatings on Plastic Substrates by Sol-Gel Process

Proceedings ◽  
2020 ◽  
Vol 57 (1) ◽  
pp. 6
Author(s):  
Raluca Manea ◽  
Violeta Purcar ◽  
Valentin Rădițoiu ◽  
Alina Rădițoiu ◽  
Monica Florentina Raduly ◽  
...  
Keyword(s):  
Sol Gel ◽  
Thin Coatings ◽  
Plastic Substrates ◽  
Sol Gel Process ◽  
Self Cleaning

Due to their range of applications, from anti-icing to self-cleaning, low-adhesion, antibacterial. [...]

Self Cleaning Photoactive TiO2 Coatings on SLS Glasses by Sol-Gel Dip Coating

2004 ◽  
Vol 264-268 ◽  
pp. 407-410 ◽  
Author(s):  
E.D. Şam ◽  
M. Urgen ◽  
F.Z. Tepehan ◽  
Volkan Gunay
Keyword(s):  
Sol Gel ◽  
Dip Coating ◽  
Self Cleaning

Hydrophobic self-cleaning surfaces of ZnO thin films synthesized by sol–gel technique

2011 ◽  
Vol 44 (29) ◽  
pp. 299801 ◽  
Author(s):  
S Patra ◽  
S Sarkar ◽  
S K Bera ◽  
R Ghosh ◽  
G K Paul
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Gel Technique ◽  
Self Cleaning

scholarly journals Progress in Sol-Gel Technology for the Coatings of Fabrics

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1838 ◽  
Author(s):  
Aravin Prince Periyasamy ◽  
Mohanapriya Venkataraman ◽  
Dana Kremenakova ◽  
Jiri Militky ◽  
Yan Zhou
Keyword(s):  
Flame Retardant ◽  
Sol Gel ◽  
Dip Coating ◽  
Uv Protection ◽  
Water Repellent ◽  
Water Separation ◽  
Factors Affecting ◽  
Wrinkle Resistance ◽  
Color Changes ◽  
Self Cleaning

The commercial availability of inorganic/organic precursors for sol-gel formulations is very high and increases day by day. In textile applications, the precursor-synthesized sol-gels along with functional chemicals can be deposited onto textile fabrics in one step by rolling, padding, dip-coating, spraying or spin coating. By using this technology, it is possible to provide fabrics with functional/multi-functional characteristics including flame retardant, anti-mosquito, water- repellent, oil-repellent, anti-bacterial, anti-wrinkle, ultraviolet (UV) protection and self-cleaning properties. These surface properties are discussed, describing the history, basic chemistry, factors affecting the sol-gel synthesis, progress in sol-gel technology along with various parameters controlling sol-gel technology. Additionally, this review deals with the recent progress of sol-gel technology in textiles in addressing fabric finishing, water repellent textiles, oil/water separation, flame retardant, UV protection and self-cleaning, self-sterilizing, wrinkle resistance, heat storage, photochromic and thermochromic color changes and the improvement of the durability and wear resistance properties.

scholarly journals Sol-Gel Coatings for Subaquatic Self-Cleaning Windows

Crystals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 375
Author(s):  
Andrew I. M. Greer ◽  
David Moodie ◽  
Graham Kerr ◽  
Nikolaj Gadegaard
Keyword(s):  
North Sea ◽  
Marine Bacteria ◽  
Optical Transmission ◽  
Sol Gel ◽  
Optical Devices ◽  
The Self ◽  
Worst Case ◽  
Airborne Pollutants ◽  
Cleaning Performance ◽  
Self Cleaning

Self-cleaning windows are well known for their ability to function with airborne pollutants, but there is a growing industry for semi-permanent subaquatic optical devices, where the performance of such windows should be considered. Here sol-gel technology is explored as a means of producing self-cleaning, subaquatic, sapphire windows. We demonstrate removal of marine bacteria and, in the worst-case contamination scenario, dead North Sea crude oil (API 35). This greasy contaminant was smeared across the windows to effectively reduce optical transmission strength to just 54%. The titania-based sol-gel-coated windows can restore transmission to within 10% of the clean value in less than one day, unlike standard sapphire windows, which lose 68% transmission following contamination and aquatic submergence over the same duration. A range of theories to enhance the self-cleaning performance of the sol-gel coating were explored, but none of the tested variables were able to provide any enhancement for subaquatic performance.

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