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Dreyer C, Motoc DL, Koehler M, Goldenberg L. UV LED Curable Perfluoropolyether (PFPE)-Urethane Methacrylate Transparent Coatings for Photonic Applications: Synthesis and Characterization. Polymers (Basel) 2023; 15:2983. [PMID: 37514374 PMCID: PMC10383132 DOI: 10.3390/polym15142983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/30/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023] Open
Abstract
The contribution aims to bring forth a novel synthesis route in developing transparent UV LED-curable coatings accounting for various exposure options. A selection of perfluoropolyether (PFPE)-urethane methacrylate and acrylate resins, free-radical photo-initiator Omnirad 2100, and two distinct silane-based crosslinking agents were blended under a weight ratio of 75:20:5 (without crosslinker) and 70:15:5:10, respectively. The coatings were cured under a UV LED 4 × 3 matrix light emitting source, in a chamber under a controlled atmosphere, by means of an in-house developed conveyor belt type platform, at different conveyor belt speeds (5, 50, 150, 250, and 500 mm/s). The morphologies of fabricated coatings were characterized by FTIR revealing high conversion rates (e.g., from 98 to 100%) for increased exposure time as a result of the 5 or 50 mm/s values, on all combinations. Dynamic-mechanical and optical properties of UV LED-cured transparent coatings were also investigated. A negative shift of the glass transition temperature values with a decrease in exposure time, in all combinations, from about 60 °C to 30 °C, along with storage moduli lowering in the glassy plateau further favors higher exposure times for curing. The refractive indices of poly-mers were from 1.38 to 1.40, whereas the thermo-optic coefficients are showing minor changes around the value of 2.55∙10-4 K-1.
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Affiliation(s)
- Christian Dreyer
- Department Fiber Composite Material Technologies, Faculty Engineering and Natural Sciences, Technical University of Applied Sciences Wildau, Hochschulring 1, 15745 Wildau, Germany
- Research Division Polymeric Materials and Composites PYCO, Fraunhofer Institute for Applied Polymer Research IAP, Schmiedestr. 5, 15745 Wildau, Germany
| | - Dana Luca Motoc
- Department of Automotive and Transport Engineering, Faculty of Mechanical Engineering, Transilvania University of Brașov, 29 Eroilor Av., 500036 Brașov, Romania
| | - Mathias Koehler
- Research Division Polymeric Materials and Composites PYCO, Fraunhofer Institute for Applied Polymer Research IAP, Schmiedestr. 5, 15745 Wildau, Germany
| | - Leonid Goldenberg
- Department Fiber Composite Material Technologies, Faculty Engineering and Natural Sciences, Technical University of Applied Sciences Wildau, Hochschulring 1, 15745 Wildau, Germany
- Research Division Polymeric Materials and Composites PYCO, Fraunhofer Institute for Applied Polymer Research IAP, Schmiedestr. 5, 15745 Wildau, Germany
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Gao L, Li L, Li Y, He C, Zhou L, Qu X, Fang S. Effects of Europium Complex on Thermal and Photoluminescence Properties of Polyurethane-Europium Materials. Polymers (Basel) 2023; 15:polym15051064. [PMID: 36904305 PMCID: PMC10007129 DOI: 10.3390/polym15051064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/05/2023] [Accepted: 02/15/2023] [Indexed: 02/25/2023] Open
Abstract
A europium complex with double bonds was synthesized with crotonic acid as the ligand and a europium ion as the center ion. Then, the obtained europium complex was added to synthesized poly(urethane-acrylate) macromonomers to prepare the bonded polyurethane-europium materials by the polymerization of the double bonds in the complex and the poly(urethane-acrylate) macromonomers. The prepared polyurethane-europium materials had high transparency, good thermal stability and good fluorescence. The storage moduli of polyurethane-europium materials are obviously higher than those of pure polyurethane. Polyurethane-europium materials exhibit bright red light with good monochromaticity. The light transmittance of the material decreases slightly with increases in the europium complex content, but the luminescence intensity gradually increases. In particular, polyurethane-europium materials possess a long luminescence lifetime, which has potential applications for optical display instruments.
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Affiliation(s)
- Lijun Gao
- School of Chemical Engineering and Technology, Hebei University of Technology, No.8 Guangrong Road, Tianjin 300130, China
- Henan Provincial Key Laboratory of Surface & Interface Science, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
- Correspondence: (L.G.); (X.Q.); (S.F.)
| | - Liuyang Li
- Henan Provincial Key Laboratory of Surface & Interface Science, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Yunqiu Li
- Henan Provincial Key Laboratory of Surface & Interface Science, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Congcong He
- Henan Provincial Key Laboratory of Surface & Interface Science, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Liming Zhou
- Henan Provincial Key Laboratory of Surface & Interface Science, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Xiongwei Qu
- School of Chemical Engineering and Technology, Hebei University of Technology, No.8 Guangrong Road, Tianjin 300130, China
- Correspondence: (L.G.); (X.Q.); (S.F.)
| | - Shaoming Fang
- School of Chemical Engineering and Technology, Hebei University of Technology, No.8 Guangrong Road, Tianjin 300130, China
- Henan Provincial Key Laboratory of Surface & Interface Science, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
- Correspondence: (L.G.); (X.Q.); (S.F.)
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Vasilopoulou M, Jose da Silva W, Soultati A, Kim HP, Kim BS, Reo Y, Ximim Gavim AE, Conforto J, Schneider FK, Felippi M, Palilis LC, Davazoglou D, Argitis P, Stergiopoulos T, Fakharuddin A, Jang J, Gasparini N, Nazeeruddin MK, Noh YY, Rashid bin Mohd Yusoff A. Photonic nanostructures mimicking floral epidermis for perovskite solar cells. CELL REPORTS. PHYSICAL SCIENCE 2022; 3:101019. [PMID: 36259071 PMCID: PMC9492859 DOI: 10.1016/j.xcrp.2022.101019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 06/17/2022] [Accepted: 08/01/2022] [Indexed: 06/16/2023]
Abstract
Here, we report photonic nanostructures replicated from the adaxial epidermis of flower petals onto light-polymerized coatings using low-cost nanoimprint lithography at ambient temperature. These multifunctional nanocoatings are applied to confer enhanced light trapping, water repellence, and UV light and environmental moisture protection features in perovskite solar cells. The former feature helps attain a maximum power conversion efficiency of 24.61% (21.01% for the reference cell) without any additional device optimization. Added to these merits, the nanocoatings also enable stable operation under AM 1.5G and UV light continuous illumination or in real-world conditions. Our engineering approach provides a simple way to produce multifunctional nanocoatings optimized by nature's wisdom.
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Affiliation(s)
- Maria Vasilopoulou
- Institute of Nanoscience and Nanotechnology (INN), National Center for Scientific Research (NCSR) “Demokritos”, Agia Paraskevi, 15341 Attica, Greece
| | - Wilson Jose da Silva
- Universidade Tecnológica Federal do Paraná, GPGEI – Av. Sete de Setembro, 3165 – CEP, 80230-901 Curitiba, Parana, Brazil
| | - Anastasia Soultati
- Institute of Nanoscience and Nanotechnology (INN), National Center for Scientific Research (NCSR) “Demokritos”, Agia Paraskevi, 15341 Attica, Greece
| | - Hyeong Pil Kim
- Advanced Display Research Center, Department of Information Display, Kyung Hee University, Dongdaemoon-gu, Seoul 130-701, South Korea
| | - Byung Soon Kim
- Advanced Display Research Center, Department of Information Display, Kyung Hee University, Dongdaemoon-gu, Seoul 130-701, South Korea
| | - Youjin Reo
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
| | - Anderson Emanuel Ximim Gavim
- Universidade Tecnológica Federal do Paraná, GPGEI – Av. Sete de Setembro, 3165 – CEP, 80230-901 Curitiba, Parana, Brazil
| | - Julio Conforto
- Universidade Tecnológica Federal do Paraná, GPGEI – Av. Sete de Setembro, 3165 – CEP, 80230-901 Curitiba, Parana, Brazil
| | - Fabio Kurt Schneider
- Universidade Tecnológica Federal do Paraná, GPGEI – Av. Sete de Setembro, 3165 – CEP, 80230-901 Curitiba, Parana, Brazil
| | - Marciele Felippi
- Universidade Tecnológica Federal do Paraná (UTFPR), Departamento de Biologia, Campus Dois Vizinhos, Estrada Para Boa Esperança, Dois Vizinhos, 85660-000 Paraná, Brazil
| | | | - Dimitris Davazoglou
- Institute of Nanoscience and Nanotechnology (INN), National Center for Scientific Research (NCSR) “Demokritos”, Agia Paraskevi, 15341 Attica, Greece
| | - Panagiotis Argitis
- Institute of Nanoscience and Nanotechnology (INN), National Center for Scientific Research (NCSR) “Demokritos”, Agia Paraskevi, 15341 Attica, Greece
| | - Thomas Stergiopoulos
- Institute of Nanoscience and Nanotechnology (INN), National Center for Scientific Research (NCSR) “Demokritos”, Agia Paraskevi, 15341 Attica, Greece
| | - Azhar Fakharuddin
- Department of Physics, University of Konstanz, 78464 Konstanz, Germany
| | - Jin Jang
- Advanced Display Research Center, Department of Information Display, Kyung Hee University, Dongdaemoon-gu, Seoul 130-701, South Korea
| | - Nicola Gasparini
- Department of Chemistry and Centre for Processable Electronics, Imperial College London, London W120BZ, UK
| | - Mohammad Khaja Nazeeruddin
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Rue de l’Industrie 17, 1951 Sion, Switzerland
| | - Yong-Young Noh
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
| | - Abd. Rashid bin Mohd Yusoff
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
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Polymer Coating Effects: Study of Material Properties and Architectural Application Characteristics of Aluminum Template. COATINGS 2021. [DOI: 10.3390/coatings11020240] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In construction process, the formwork must be in contact with concrete to help the concrete solidify and fix the shape. Coating the formwork with a polymer can prolong its service life by reducing the amount of concrete sticking to the mold. Herein, an aluminum template substrate was coated with polyvinylidene difluoride (PVDF) or polyurethane (PU). Aluminum template material analysis was conducted, polymer film thickness was measured, and weather, moisture, pollution, salt spray, abrasion, impact, and acid and alkali resistance tests were conducted, as were tensile, bending, adhesion, hardness, and salt water resistance tests. Cement adhesion resistance was repeatedly tested. The experimental results indicated that the PVDF-coated template was superior. The novel PVDF Aluminum template exhibited high corrosion resistance and can be used in building materials, for example, in ceilings, partition walls, curtain walls, roof panels, and roof trusses. For reference, it can also be applied to ship structures and seaside and wind power generation projects.
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Norouzbahari S, Gharibi R. UV Cross-Linked Poly(ethylene glycol)-Based Membranes with Different Fractional Free Volumes for CO2 Capture: Synthesis, Characterization, and Thiol-ene Modification Evaluation. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06193] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
| | - Reza Gharibi
- Faculty of Chemistry, Kharazmi University, 15719-14911 Tehran, Iran
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