Towards a Long-Chain Perfluoroalkyl Replacement: Water and Oil Repellent Perfluoropolyether-Based Polyurethane Oligomers
Original perfluoropolyether (PFPE)-based oligomeric polyurethanes (FOPUs) with different macromolecular architecture were synthesized (in one step) as low-surface-energy materials. It is demonstrated that the oligomers, especially the ones terminated with CF<sub>3</sub> moieties, can be...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/7/1128 |
| _version_ | 1797539008766541824 |
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| author | Liying Wei Tugba D. Caliskan Philip J. Brown Igor Luzinov |
| author_facet | Liying Wei Tugba D. Caliskan Philip J. Brown Igor Luzinov |
| author_sort | Liying Wei |
| collection | DOAJ |
| description | Original perfluoropolyether (PFPE)-based oligomeric polyurethanes (FOPUs) with different macromolecular architecture were synthesized (in one step) as low-surface-energy materials. It is demonstrated that the oligomers, especially the ones terminated with CF<sub>3</sub> moieties, can be employed as safer replacements to long-chain perfluoroalkyl substances/additives. The FOPU macromolecules, when added to an engineering thermoplastic (polyethylene terephthalate, PET) film, readily migrate to the film surface and bring significant water and oil repellency to the thermoplastic boundary. The best performing FOPU/PET films have reached the level of oil wettability and surface energy significantly lower than that of polytetrafluoroethylene, a fully perfluorinated polymer. Specifically, the highest level of the repellency is observed with an oligomeric additive, which was made using aromatic diisocyanate as a comonomer and has CF<sub>3</sub> end-group. This semicrystalline oligomer has a glass transition temperature (<i>T</i><sub>g</sub>) well above room temperature, and we associate the superiority of the material in achieving low water and oil wettability with its ability to effectively retain CF<sub>3</sub> and CF<sub>2</sub> moieties in contact with the test wetting liquids. |
| first_indexed | 2024-03-10T12:40:16Z |
| format | Article |
| id | doaj.art-110558346f834532a58feedc1183118b |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T12:40:16Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-110558346f834532a58feedc1183118b2023-11-21T13:56:21ZengMDPI AGPolymers2073-43602021-04-01137112810.3390/polym13071128Towards a Long-Chain Perfluoroalkyl Replacement: Water and Oil Repellent Perfluoropolyether-Based Polyurethane OligomersLiying Wei0Tugba D. Caliskan1Philip J. Brown2Igor Luzinov3Department of Materials Science and Engineering, Clemson University, Clemson, SC 29634, USADepartment of Materials Science and Engineering, Clemson University, Clemson, SC 29634, USADepartment of Materials Science and Engineering, Clemson University, Clemson, SC 29634, USADepartment of Materials Science and Engineering, Clemson University, Clemson, SC 29634, USAOriginal perfluoropolyether (PFPE)-based oligomeric polyurethanes (FOPUs) with different macromolecular architecture were synthesized (in one step) as low-surface-energy materials. It is demonstrated that the oligomers, especially the ones terminated with CF<sub>3</sub> moieties, can be employed as safer replacements to long-chain perfluoroalkyl substances/additives. The FOPU macromolecules, when added to an engineering thermoplastic (polyethylene terephthalate, PET) film, readily migrate to the film surface and bring significant water and oil repellency to the thermoplastic boundary. The best performing FOPU/PET films have reached the level of oil wettability and surface energy significantly lower than that of polytetrafluoroethylene, a fully perfluorinated polymer. Specifically, the highest level of the repellency is observed with an oligomeric additive, which was made using aromatic diisocyanate as a comonomer and has CF<sub>3</sub> end-group. This semicrystalline oligomer has a glass transition temperature (<i>T</i><sub>g</sub>) well above room temperature, and we associate the superiority of the material in achieving low water and oil wettability with its ability to effectively retain CF<sub>3</sub> and CF<sub>2</sub> moieties in contact with the test wetting liquids.https://www.mdpi.com/2073-4360/13/7/1128oil repellencywater repellencyperfluoropolyethersoligomerfluorinated polyurethanesoleophobicity |
| spellingShingle | Liying Wei Tugba D. Caliskan Philip J. Brown Igor Luzinov Towards a Long-Chain Perfluoroalkyl Replacement: Water and Oil Repellent Perfluoropolyether-Based Polyurethane Oligomers Polymers oil repellency water repellency perfluoropolyethers oligomer fluorinated polyurethanes oleophobicity |
| title | Towards a Long-Chain Perfluoroalkyl Replacement: Water and Oil Repellent Perfluoropolyether-Based Polyurethane Oligomers |
| title_full | Towards a Long-Chain Perfluoroalkyl Replacement: Water and Oil Repellent Perfluoropolyether-Based Polyurethane Oligomers |
| title_fullStr | Towards a Long-Chain Perfluoroalkyl Replacement: Water and Oil Repellent Perfluoropolyether-Based Polyurethane Oligomers |
| title_full_unstemmed | Towards a Long-Chain Perfluoroalkyl Replacement: Water and Oil Repellent Perfluoropolyether-Based Polyurethane Oligomers |
| title_short | Towards a Long-Chain Perfluoroalkyl Replacement: Water and Oil Repellent Perfluoropolyether-Based Polyurethane Oligomers |
| title_sort | towards a long chain perfluoroalkyl replacement water and oil repellent perfluoropolyether based polyurethane oligomers |
| topic | oil repellency water repellency perfluoropolyethers oligomer fluorinated polyurethanes oleophobicity |
| url | https://www.mdpi.com/2073-4360/13/7/1128 |
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