Fluorescent UV-curable Polyurethane Acrylate Nanocomposite Coatings Strengthened with Carbon Quantum Dots: Preparation and Investigation of UV-blocking and Anti-Corrosive Properties
Most polymers exposed to UV radiating from the sun deteriorate and lose their mechanical features. Polymer coatings are generally used for protection of metal surfaces against corrosive factors. Thus, production of coatings blocking the sunlight UV rays is necessary to protect the metal surfaces. Th...
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Semnan University
2024-11-01
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| Series: | شیمی کاربردی روز |
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| Online Access: | https://chemistry.semnan.ac.ir/article_8798_8915f28a64eaf123e497faf21aea2a2f.pdf |
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| author | Abbas Madhi Behzad Shirkavand Hadavand Mohammad Hassan Madhi Zahra Rahmani |
| author_facet | Abbas Madhi Behzad Shirkavand Hadavand Mohammad Hassan Madhi Zahra Rahmani |
| author_sort | Abbas Madhi |
| collection | DOAJ |
| description | Most polymers exposed to UV radiating from the sun deteriorate and lose their mechanical features. Polymer coatings are generally used for protection of metal surfaces against corrosive factors. Thus, production of coatings blocking the sunlight UV rays is necessary to protect the metal surfaces. This work mainly focuses on synthesis of fluorescent bio-based UV-curable polyurethane acrylate (PUA) and studies the changes occurred in the various specifications of these coatings resulted from adding carbon quantum dots (CQDs). To synthesize PUA oligomer, castor oil was applied as a natural and biocompatible substance instead of chemical polyols. By pyrolysis of the starch and water blend, CQDs were synthesized using microwave-assisted method. To characterize the synthesized coatings and to analyze the reinforcing effect of CQDs on the resultant nanocomposite, electroscopic methods were utilized. Adding CQDs 0.5 wt% to PUA resin resulted in improvement of adhesion strength and thermal stability in PUA/CQDs (0.5 wt%) coating compared to PUA (pure) coating. With exposing PUA/CQDs to UV rays, blue fluorescence was emitted and strong absorption bands also appeared in all of the UV regions. Most of the UV rays passed through the PUA film, while PUA/CQDs blocked higher than 99% of UV radiation. Results from salt spray and EIS tests confirmed that resistance to corrosion was improved in PUA/CQDs coating versus the pure coating. |
| format | Article |
| id | doaj-art-45b811b1dd33498abc5de3be711a0821 |
| institution | OA Journals |
| issn | 2981-2437 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Semnan University |
| record_format | Article |
| series | شیمی کاربردی روز |
| spelling | doaj-art-45b811b1dd33498abc5de3be711a08212025-08-20T01:59:17ZengSemnan Universityشیمی کاربردی روز2981-24372024-11-011973415410.22075/chem.2024.33360.22538798Fluorescent UV-curable Polyurethane Acrylate Nanocomposite Coatings Strengthened with Carbon Quantum Dots: Preparation and Investigation of UV-blocking and Anti-Corrosive PropertiesAbbas Madhi0Behzad Shirkavand Hadavand1Mohammad Hassan Madhi2Zahra Rahmani3Color Technology Incubator, Institute for Color Science and TechnologyDepartment of Resin and Additives, Institute for Color Science and Technology, 1668814811, Tehran, IranFaculty of Art and Architecture, Islamic Azad University West Tehran Branch,1468763785, Tehran, IranDepartment of Resin and Additives, Institute for Color Science and Technology, 1668814811, Tehran, IranMost polymers exposed to UV radiating from the sun deteriorate and lose their mechanical features. Polymer coatings are generally used for protection of metal surfaces against corrosive factors. Thus, production of coatings blocking the sunlight UV rays is necessary to protect the metal surfaces. This work mainly focuses on synthesis of fluorescent bio-based UV-curable polyurethane acrylate (PUA) and studies the changes occurred in the various specifications of these coatings resulted from adding carbon quantum dots (CQDs). To synthesize PUA oligomer, castor oil was applied as a natural and biocompatible substance instead of chemical polyols. By pyrolysis of the starch and water blend, CQDs were synthesized using microwave-assisted method. To characterize the synthesized coatings and to analyze the reinforcing effect of CQDs on the resultant nanocomposite, electroscopic methods were utilized. Adding CQDs 0.5 wt% to PUA resin resulted in improvement of adhesion strength and thermal stability in PUA/CQDs (0.5 wt%) coating compared to PUA (pure) coating. With exposing PUA/CQDs to UV rays, blue fluorescence was emitted and strong absorption bands also appeared in all of the UV regions. Most of the UV rays passed through the PUA film, while PUA/CQDs blocked higher than 99% of UV radiation. Results from salt spray and EIS tests confirmed that resistance to corrosion was improved in PUA/CQDs coating versus the pure coating.https://chemistry.semnan.ac.ir/article_8798_8915f28a64eaf123e497faf21aea2a2f.pdfbio-basedpolyurethane acrylatefluorescent coatingsuv-blocking propertyanti-corrosive behavior |
| spellingShingle | Abbas Madhi Behzad Shirkavand Hadavand Mohammad Hassan Madhi Zahra Rahmani Fluorescent UV-curable Polyurethane Acrylate Nanocomposite Coatings Strengthened with Carbon Quantum Dots: Preparation and Investigation of UV-blocking and Anti-Corrosive Properties شیمی کاربردی روز bio-based polyurethane acrylate fluorescent coatings uv-blocking property anti-corrosive behavior |
| title | Fluorescent UV-curable Polyurethane Acrylate Nanocomposite Coatings Strengthened with Carbon Quantum Dots: Preparation and Investigation of UV-blocking and Anti-Corrosive Properties |
| title_full | Fluorescent UV-curable Polyurethane Acrylate Nanocomposite Coatings Strengthened with Carbon Quantum Dots: Preparation and Investigation of UV-blocking and Anti-Corrosive Properties |
| title_fullStr | Fluorescent UV-curable Polyurethane Acrylate Nanocomposite Coatings Strengthened with Carbon Quantum Dots: Preparation and Investigation of UV-blocking and Anti-Corrosive Properties |
| title_full_unstemmed | Fluorescent UV-curable Polyurethane Acrylate Nanocomposite Coatings Strengthened with Carbon Quantum Dots: Preparation and Investigation of UV-blocking and Anti-Corrosive Properties |
| title_short | Fluorescent UV-curable Polyurethane Acrylate Nanocomposite Coatings Strengthened with Carbon Quantum Dots: Preparation and Investigation of UV-blocking and Anti-Corrosive Properties |
| title_sort | fluorescent uv curable polyurethane acrylate nanocomposite coatings strengthened with carbon quantum dots preparation and investigation of uv blocking and anti corrosive properties |
| topic | bio-based polyurethane acrylate fluorescent coatings uv-blocking property anti-corrosive behavior |
| url | https://chemistry.semnan.ac.ir/article_8798_8915f28a64eaf123e497faf21aea2a2f.pdf |
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