Characteristics of Functional Coating Films on Glass Substrates for Photovoltaic Modules According to the Coating Method Used

2020 ◽  
Vol 12 (9) ◽  
pp. 1425-1428
Author(s):  
Ma Minh Trang ◽  
Changyeon Lee ◽  
Jung Hyun Kim ◽  
Young Park ◽  
Yeon-Ho Joung ◽  
...  
Keyword(s):  
Contact Angle ◽  
Light Transmittance ◽  
Integrating Sphere ◽  
Cover Glass ◽  
Coating Films ◽  
Functional Coating ◽  
Glass Substrates ◽  
Hot Air ◽  
Pv Modules ◽  
Coating Method

This study analyzes characteristics of anti-pollution functional coating films on glass substrates for PV modules that were coated using different methods and annealed using hot air fans. For the purpose of this study, antipollution functional coating films were applied on glass substrates made of the same material as the cover glass for PV modules. Each one of the following three coating methods: brushing, fabric and dipping was applied into separate specimens. Afterwards, all the films were rest in room temperature for 20 minutes and then annealed using hot air fans at 300 °C for 2 minutes. Specimens undergone both coating and annealing process were analyzed for their anti-pollution properties, contact angle, optical characteristics and other mechanical properties such as hardness and adhesion. Contact angle was analyzed using a contact-angle analyzer, and light transmittance was analyzed using UV-visible which is capable of utilizing the integrating sphere. Based on the results of this study, the most suitable coating method for hot-fan-annealed film was found. If the coating process proposed in this study is applied to PV modules production, improvement in anti-pollution characteristics as well as energy generation efficiency can be expected.

scholarly journals A Study on the Annealing Ambient Effect on the Anti-Pollution Characteristics of Functional Film for PV Modules

2018 ◽  
Vol 8 (11) ◽  
pp. 2285
Author(s):  
Sejin Jung ◽  
Jung Kim ◽  
Jang Ko ◽  
Wonseok Choi
Keyword(s):  
Contact Angle ◽  
Mechanical Characteristics ◽  
Spray Coating ◽  
Light Transmittance ◽  
Process Conditions ◽  
Coating Film ◽  
Coating Films ◽  
Functional Coating ◽  
Pollution Characteristics ◽  
Pv Modules

In this study, functional coating film was fabricated on glass for photovoltaic (PV) modules to improve the anti-pollution characteristics of PV modules. The functional coating film applied to a glass substrate through the spray coating method was annealed at 300 °C for 10 min in H2, N2, Ar, O2, and vacuum ambient. The contact angle of the coated surface was measured and it was confirmed that the anti-pollution characteristics were improved as the contact angle decreased. The light transmittance was measured and it exhibited the most excellent characteristics in vacuum. The hardness and adhesion were measured as the mechanical characteristics and they were all excellent regardless of the annealing ambient. Based on the analyzed characteristics, the process conditions of functional coating films were optimized to improve the anti-pollution and mechanical characteristics. If the coating process optimized in this study is applied to PV modules based on these results, improvement in the anti-pollution characteristics can be expected.

scholarly journals Characteristics of Functional Film Synthesized on the Cover Glass of Photovoltaic Modules

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6671
Author(s):  
Seungcheol Yoo ◽  
Changyeon Lee ◽  
Seokwon Lee ◽  
Chulsoo Kim ◽  
Wonseok Choi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Contact Angle ◽  
Contact Angles ◽  
Light Transmittance ◽  
Cover Glass ◽  
Coating Films ◽  
Special Equipment ◽  
Functional Coating ◽  
Testing Method

In this study, the characteristics of functional films were investigated according to the number of coatings and their heat treatment times. The functional coating films were deposited on glass substrates made of the same material as the cover glass of photovoltaic (PV) modules. Each film was coated once by brushing with a special silica-based solution, and each heat treatment was done using a hot-air fan for 2 min at 300 °C. The substrates were coated once, twice, and thrice, respectively, and were annealed once, twice, and thrice by drying and cooling alternately. The specimens were then analyzed for their anti-pollution properties, contact angles, light transmittance, and mechanical properties. The anti-pollution function was confirmed through a self-cleaning test, while the contact angle and light transmittance were examined using special equipment. Mechanical properties, including hardness and adhesion, were confirmed using the standard hardness testing method (ASTM D3363) such as those using an H-9H, F, HB, or B-6B pencil (Mitsubishi, Japan) and a standard adhesion testing method (ASTM D3359). It was confirmed that the film coated once yielded a very low contact angle of 8.9° and very good anti-pollution properties. Its adhesion and strength also showed high values of 5B and 9H, respectively.

scholarly journals Development of an anti-pollution coating process technology for the application of an on-site PV module

2019 ◽  
Vol 10 ◽  
pp. 332-336
Author(s):  
Sejin Jung ◽  
Wonseok Choi ◽  
Jung Hyun Kim ◽  
Jang Myoun Ko
Keyword(s):  
Simple Procedure ◽  
Annealing Treatment ◽  
Light Transmittance ◽  
Process Conditions ◽  
Process Technology ◽  
Coating Films ◽  
Functional Coating ◽  
Pollution Characteristics ◽  
Pv Module ◽  
Pv Modules

This study aimed to apply annealing processes during the coating of photovoltaic (PV) module glasses to PV modules already installed through an easy and simple procedure. Three types of annealing treatments were applied to PV module glasses, i.e., furnace, rapid thermal annealing (RTA) and torch. Among these, torch annealing, which can be easily carried out at PV module installation sites, was applied to PV module glasses using different numbers of repetition. Light transmittance, contact angle, anti-pollution characteristics, adhesion and hardness of the functional coating films after using different annealing treatment times and methods were measured, and it was confirmed that these characteristics varied depending on the annealing treatment times and methods. Through this, it was possible to optimize the process conditions that provide excellent anti-pollution characteristics and could be easily utilized at on-site PV modules.

scholarly journals Investigation of the Effects of Component Ratios on the Properties of Superhydrophobic Polyurethane/Fluorinated Acrylic Co-Polymer/SiO2 Nanocomposite Coatings

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 174
Author(s):  
Chong Ke ◽  
Zhongfa Li ◽  
Chenhua Zhang ◽  
Xinguo Wu ◽  
Zhiping Zhu ◽  
...  
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Abrasion Resistance ◽  
Light Transmittance ◽  
Practical Application ◽  
Water Contact ◽  
Glass Substrates ◽  
Superhydrophobic Coatings ◽  
One Step ◽  
Good Transparency

In this work, polyurethane/fluorinated acrylic co-polymer/silicon dioxide (PU/FAP/SiO2) hybrid superhydrophobic coatings were fabricated on glass substrates via a simple one-step coating process. The effects of each coating component on the coating properties were systematically investigated. The optimized coating exhibits a water contact angle (WCA) of 159° and a rolling angle of 3°. Meanwhile, the coating has an optical light transmittance of 88%, indicating the good transparency of the coating. Besides, the coating demonstrates an adequate level of abrasion resistance. After a total abrasion distance of 300 cm against a piece of 800 mesh sand paper, the sample still kept a water contact angle of about 110°, showing its high abrasion resistance. Therefore, the optimized coating has a great potential for practical application.

Characterization of Anti-Pollution Films by Thickness for Photovoltaic Modules That Can Be Applied in the Field

2020 ◽  
Vol 12 (9) ◽  
pp. 1420-1424
Author(s):  
Changyeon Lee ◽  
Jung Hyun Kim ◽  
Young Park ◽  
Yeon-Ho Joung ◽  
Wonseok Choi
Keyword(s):  
Heat Treatment ◽  
Contact Angle ◽  
Optical Properties ◽  
Treatment Process ◽  
Coating Process ◽  
Coating Film ◽  
Heat Treatment Process ◽  
Functional Coating ◽  
Testing Method ◽  
Hot Air

In this study, the characteristics of functional coating films were investigated to improve the anti-pollution properties and efficiency of PV (Photovoltaic) module according to the variation of coating film thickness. Functional coating was applied of a glass substrate, which was composed with the same material as PV module. Brush coating method was used for the coating process. We coated the functional film on the glass substrate 1, 2 and 3 times alternately in the horizontal and vertical directions to change the film thickness, and a hot air fan equipment was used as a heat treatment process for easy application to existing PV modules. The heat treatment process was performed for 2 minutes after the coating process using a hot air fan equipment. After coating and heat treatment, glass substrates were analyzed for the anti-pollution properties, contact angle, optical properties and the mechanical properties such as hardness and adhesion. The anti-pollution properties were identified through self-cleaning test. The contact angle of the functional coating film was measured by a contact angle analyzer, and the optical properties were measured via UV-visible spectroscopy, which can be used as an integrating sphere. The hardness of the functional film was measured by the standard hardness testing method using H-9H, F, HB and B-6B pencil. Also, the adhesion of the functional film was measured by the standard adhesion testing method.

PREPARATION AND CHARACTERIZATION OF POLYVINYL ALCOHOL THIN FILMS FOR ORGANIC THIN FILM TRANSISTORS AND BIOMEDICAL APPLICATIONS

2018 ◽  
Vol 5 (2) ◽  
pp. 16-18
Author(s):  
Chandar Shekar B ◽  
Ranjit Kumar R ◽  
Dinesh K.P.B ◽  
Sulana Sundar C ◽  
Sunnitha S ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Thin Film Transistors ◽  
Gravimetric Method ◽  
Dip Coating ◽  
Organic Thin Film Transistors ◽  
Poly Vinyl Alcohol ◽  
Organic Thin Film ◽  
Glass Substrates ◽  
Coating Method

Thin films of poly vinyl alcohol (PVA) were prepared on pre-cleaned glass substrates by Dip Coating Method. FTIR spectrum was used to identify the functional groups present in the prepared films. The vibrational peaks observed at 1260 cm-1 and 851 cm-1 are assigned to C–C stretching and CH rocking of PVA.The characteristic band appearing at 1432 cm-1 is assigned to C–H bend of CH2 of PVA. The thickness of the prepared thin films were measured by using an electronic thickness measuring instrument (Tesatronic-TTD20) and cross checked by gravimetric method. XRD spectra indicated the amorphous nature of the films.Surface morphology of the coated films was studied by scanning electron microscope (SEM). The surface revealed no pits and pin holes on the surface. The observed surface morphology indicated that these films could be used as dielectric layer in organic thin film transistors and as drug delivery system for wound healing.

scholarly journals Ecofriendly Preparation and Characterization of a Cassava Starch/Polybutylene Adipate Terephthalate Film

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 329
Author(s):  
Tan Yi ◽  
Minghui Qi ◽  
Qi Mo ◽  
Lijie Huang ◽  
Hanyu Zhao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Contact Angle ◽  
Water Vapor ◽  
Composite Film ◽  
Water Absorption ◽  
Composite Films ◽  
Thermoplastic Starch ◽  
Light Transmittance ◽  
Infrared Spectrometry ◽  
Nano Zno

Composite films of polybutylene adipate terephthalate (PBAT) were prepared by adding thermoplastic starch (TPS) (TPS/PBAT) and nano-zinc oxide (nano-ZnO) (TPS/PBAT/nano-ZnO). The changes of surface morphology, thermal properties, crystal types and functional groups of starch during plasticization were analyzed by scanning electron microscopy, synchronous thermal analysis, X-ray diffraction, infrared spectrometry, mechanical property tests, and contact Angle and transmittance tests. The relationship between the addition of TPS and the tensile strength, transmittance, contact angle, water absorption, and water vapor barrier of the composite film, and the influence of nano-ZnO on the mechanical properties and contact angle of the 10% TPS/PBAT composite film. Experimental results show that, after plasticizing, the crystalline form of starch changed from A-type to V-type, the functional group changed and the lipophilicity increased; the increase of TPS content, the light transmittance and mechanical properties of the composite membrane decreased, while the water vapor transmittance and water absorption increased. The mechanical properties of the composite can be significantly improved by adding nano-ZnO at a lower concentration (optimum content is 1 wt%).

A Novel Cell Co-Culture Method Utilizing Thermo-Responsive Surface

2007 ◽  
Vol 342-343 ◽  
pp. 221-224
Author(s):  
Jin Suk Bae ◽  
Ga Young Jun ◽  
Akihiko Kikuchi ◽  
Teruo Okano ◽  
Chang Hyun Ahn ◽  
...  
Keyword(s):  
Contact Angle ◽  
Electron Spectroscopy ◽  
Electron Beam Irradiation ◽  
Culture Method ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Beam Irradiation ◽  
Cover Glass ◽  
Force Microscopy ◽  
Atomic Force

In this work, we developed a novel patterned co-culture method with thermo-responsive poly(N-isopropylacrylamide) (PIPAAm) and poly(N-ρ-vinylbenzyl-Ο-β-D-galactopyranosyl-(1→ 4)-D-gluconamide) (PVLA) inducing active hepatocyte attachment. Patterned graft of PIPAAm onto PS dishes was carried out by electron beam irradiation using cover-glass as a photomask. PVLA was only coated onto PIPAAm-ungrafted domain because of hydrated hydrophilic property of PIPAAm at below the LCST. Analysis by attenuated total reflection-Fourier transform infrared and electron spectroscopy for chemical analysis revealed that PIPAAm and PVLA were successfully grafted and coated on surfaces of PS dishes. PIPAAm-grafted surface exhibited decreasing contact angle by changing temperature from 37 to 20°C, while PVLA-coated PS and non-treated PS had negligible contact angle changes with temperature alternation. Atomic force microscopy (AFM) results showed that PIPAAm-grafted and PVLA-coated PS had smoother surfaces than that of ungrafted PS dishes. After culture for 12 hours, hepatocytes were well attached on PVLA-coated domain. Hepatocytes adherent on PIPAAm-grafted domain were detached by decreasing temperature. And then, fibroblasts were seeded onto PIPAAm pattern-grafted domain. Fibroblasts were only attached and spread onto PIPAAm-grafted domain. Co-cultured hepatocytes showed better differentiated function of albumin expression compared to homotypic hepatocyte culture

Properties of Nano-Hybrid Sol-Gel Materials Synthesized from Colloidal Silica-Silane Containing Epoxy Silane

2007 ◽  
Vol 336-338 ◽  
pp. 2278-2281 ◽  
Author(s):  
Moon Kyong Na ◽  
Dong Pil Kang ◽  
Hoy Yul Park ◽  
Myeong Sang Ahn ◽  
In Hye Myung
Keyword(s):  
Contact Angle ◽  
Colloidal Silica ◽  
Flat Surface ◽  
Coating Layer ◽  
Sol Gel ◽  
Chemical Properties ◽  
Coating Films ◽  
Initial Stage ◽  
Physical And Chemical ◽  
And Chemical Properties

Three kinds of colloidal silica (CS)/silane sol solutions were synthesized in variation with parameters such as different acidity and reaction time. Sol solutions were prepared from HSA CS/ methyltrimethoxysilane (MTMS), LS CS/MTMS and LS CS/MTMS/γ -Glycidoxypropyltri methoxysilane (ES) solutions. In order to understand their physical and chemical properties, sol-gel coating films were fabricated on glass. Coating films on glass, obtained from LS/MTMS sol, had high contact angle, also, much enhanced flat surface in the case of LS/MTMS sol was observed in comparison with HSA/ MTMS sol. From all sol-gel solutions, seasoning effect of for enhancing properties of sol-gel coating layer on glass was observed while such sol-gel solutions were left for 7days. In initial stage of sol-gel reaction, all most of sol solutions used in this work seem to be unstable, formation of coating films was a little hazy and rough. However, improved coating films as observed in 4days later. LS/MTMS/ES sol solutions were synthesized with ES, adding to LS/MTMS sol. Contact angle of LS/MTMS/ES sol-gel coating films decreased, since ES played a role in forming hydrophilic hydroxyl sol. The elastic portion of coating films prepared from LS/MTMS/ES sol increased with addition of ES, but thermal stability decreased a little.

scholarly journals Nanocomposite Film Based on Cellulose Acetate and Lignin-Rich Rice Straw Nanofibers

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 595 ◽  
Author(s):  
Mohammad Hassan ◽  
Linn Berglund ◽  
Ragab Abou-Zeid ◽  
Enas Hassan ◽  
Wafaa Abou-Elseoud ◽  
...  
Keyword(s):  
Contact Angle ◽  
Cellulose Acetate ◽  
Rice Straw ◽  
Water Vapor Permeability ◽  
Light Transmittance ◽  
Vapor Permeability ◽  
Water Contact ◽  
Transparent Films ◽  
Force Microscopy ◽  
Good Transparency

Nanofibers isolated from unbleached neutral sulfite rice straw pulp were used to prepare transparent films without the need to modify the isolated rice straw nanofibers (RSNF). RSNF with loading from 1.25 to 10 wt.% were mixed with cellulose acetate (CA) solution in acetone and films were formed by casting. The films were characterized regarding their transparency and light transmittance, microstructure, mechanical properties, crystallinity, water contact angle, porosity, water vapor permeability, and thermal properties. The results showed good dispersion of RSNF in CA matrix and films with good transparency and homogeneity could be prepared at RSNF loadings of less than 5%. As shown from contact angle and atomic force microscopy (AFM) measurements, the RSNF resulted in increased hydrophilic nature and roughness of the films. No significant improvement in tensile strength and Young’s modulus was recorded as a result of adding RSNF to CA. Addition of the RSNF did not significantly affect the porosity, crystallinity and melting temperature of CA, but slightly increased its glass transition temperature.

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