Dyeable Hydrophilic Surface Modification for PTFE Substrates by Surface Fluorination
Polytetrafluoroethylene (PTFE) is the most widely used fluoropolymer that has various functionalities such as heat resistance, chemical resistance, abrasion resistance, and non-adhesiveness. However, PTFE is difficult to dye because of its high water repellency. In this study, the PTFE surface was m...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/13/1/57 |
| _version_ | 1827623297240530944 |
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| author | Mizuki Kobayashi Fumihiro Nishimura Jae-Ho Kim Susumu Yonezawa |
| author_facet | Mizuki Kobayashi Fumihiro Nishimura Jae-Ho Kim Susumu Yonezawa |
| author_sort | Mizuki Kobayashi |
| collection | DOAJ |
| description | Polytetrafluoroethylene (PTFE) is the most widely used fluoropolymer that has various functionalities such as heat resistance, chemical resistance, abrasion resistance, and non-adhesiveness. However, PTFE is difficult to dye because of its high water repellency. In this study, the PTFE surface was modified by a combination of gold sputtering and surface fluorination to improve dyeability. X-ray photoelectron spectroscopy indicated that, compared with the untreated sample, the gold-sputtered and acid-washed surface of PTFE had a negligible number of C–F terminals. Furthermore, the intensity of the C–C peak increased drastically. The polar groups (C=O and C–F<sub>x</sub>) increased after surface fluorination, which enhanced the electronegativity of the surface according to the zeta potential results. Dyeing tests with methylene blue basic dye showed that the dye staining intensity on the surface of fluorinated PTFE samples was superior to other samples. It is due to the increased surface roughness and the negatively charged surface of fluorinated PTFE samples. The modified PTFE substrates may find broad applicability for dyeing, hydrophilic membrane filters, and other adsorption needs. |
| first_indexed | 2024-03-09T11:44:40Z |
| format | Article |
| id | doaj.art-a08d992a2d5d4c3481bbb482c7b58971 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-09T11:44:40Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-a08d992a2d5d4c3481bbb482c7b589712023-11-30T23:26:37ZengMDPI AGMembranes2077-03752023-01-011315710.3390/membranes13010057Dyeable Hydrophilic Surface Modification for PTFE Substrates by Surface FluorinationMizuki Kobayashi0Fumihiro Nishimura1Jae-Ho Kim2Susumu Yonezawa3Department of Materials Science and Engineering, Faculty of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, JapanCooperative Research Center, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, JapanDepartment of Materials Science and Engineering, Faculty of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, JapanCooperative Research Center, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, JapanPolytetrafluoroethylene (PTFE) is the most widely used fluoropolymer that has various functionalities such as heat resistance, chemical resistance, abrasion resistance, and non-adhesiveness. However, PTFE is difficult to dye because of its high water repellency. In this study, the PTFE surface was modified by a combination of gold sputtering and surface fluorination to improve dyeability. X-ray photoelectron spectroscopy indicated that, compared with the untreated sample, the gold-sputtered and acid-washed surface of PTFE had a negligible number of C–F terminals. Furthermore, the intensity of the C–C peak increased drastically. The polar groups (C=O and C–F<sub>x</sub>) increased after surface fluorination, which enhanced the electronegativity of the surface according to the zeta potential results. Dyeing tests with methylene blue basic dye showed that the dye staining intensity on the surface of fluorinated PTFE samples was superior to other samples. It is due to the increased surface roughness and the negatively charged surface of fluorinated PTFE samples. The modified PTFE substrates may find broad applicability for dyeing, hydrophilic membrane filters, and other adsorption needs.https://www.mdpi.com/2077-0375/13/1/57polytetrafluoroethyleneAu sputteringsurface fluorinationdyeable layer |
| spellingShingle | Mizuki Kobayashi Fumihiro Nishimura Jae-Ho Kim Susumu Yonezawa Dyeable Hydrophilic Surface Modification for PTFE Substrates by Surface Fluorination Membranes polytetrafluoroethylene Au sputtering surface fluorination dyeable layer |
| title | Dyeable Hydrophilic Surface Modification for PTFE Substrates by Surface Fluorination |
| title_full | Dyeable Hydrophilic Surface Modification for PTFE Substrates by Surface Fluorination |
| title_fullStr | Dyeable Hydrophilic Surface Modification for PTFE Substrates by Surface Fluorination |
| title_full_unstemmed | Dyeable Hydrophilic Surface Modification for PTFE Substrates by Surface Fluorination |
| title_short | Dyeable Hydrophilic Surface Modification for PTFE Substrates by Surface Fluorination |
| title_sort | dyeable hydrophilic surface modification for ptfe substrates by surface fluorination |
| topic | polytetrafluoroethylene Au sputtering surface fluorination dyeable layer |
| url | https://www.mdpi.com/2077-0375/13/1/57 |
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