Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/83819
Título: | Atmospheric plasma and UV polymerisation for developing sustainable anti-adhesive polyethylene terephthalate (PET) surfaces |
Autor(es): | Caykara, Tugce Fernandes, Sara Braga, Adelaide Correia Rodrigues, Joana Lúcia Lima Correia Rodrigues, L. R. Silva, Carla Joana |
Palavras-chave: | Grafting Hydrophilicity Surface modification Wettability Plasma UV polymerisation |
Data: | 31-Mar-2023 |
Editora: | Multidisciplinary Digital Publishing Institute (MDPI) |
Revista: | Coatings |
Citação: | Caykara, Tugce; Fernandes, Sara; Braga, Adelaide; Rodrigues, Joana L.; Rodrigues, Lígia R.; Silva, Carla Joana, Atmospheric plasma and UV polymerisation for developing sustainable anti-adhesive polyethylene terephthalate (PET) surfaces. Coatings, 13(4), 715, 2023 |
Resumo(s): | Enhancing the hydrophilicity of polymeric materials is an important step for achieving anti-adhesiveness. Thus, in this study, atmospheric plasma as a pre-treatment was combined with a UV grafting process to obtain a durable surface modification on polyethylene terephthalate (PET). The most promising conditions for the atmospheric plasma process were found to be 15 kW power and 4 m/min speed, leading to a contact angle reduction from 70 ± 6° to approximately 30°. However, it was observed that these values increased over time due to the ageing and washing of the PET surface, ultimately causing it to recover its initial contact angle. Therefore, the plasma-pre-treated PET samples were further modified through a UV grafting process using sodium acrylate (NaAc) and 3-sulfopropyl acrylate potassium salts (KAc). The grafted acrylate PET samples exhibited contact angles of 8 ± 3° and 28 ± 13° for NaAc and KAc, respectively, while showing durability in ageing and washing tests. The dry film thicknesses for both samples were found to be 28 ± 2 μm. Finally, the anti-adhesive properties of the NaAc- and KAc-treated surfaces were evaluated using an Escherichia coli expressing YadA, an adhesive protein from Yersinia. The modified PET surfaces were highly effective in reducing bacterial adhesion by more than 90%. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/83819 |
DOI: | 10.3390/coatings13040715 |
e-ISSN: | 2079-6412 |
Versão da editora: | https://www.mdpi.com/journal/coatings |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_56142_1.pdf | 4,61 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons