Enzymatic Modification of Polyamide for Improving the Conductivity of Water-Based Multilayer Nanocoatings
| Autor: | Jaime C. Grunlan, Eva Magovac, Daniel L. Stevens, Sandra Bischof, Anita Tarbuk, Igor Jordanov |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
biology General Chemical Engineering General Chemistry Conductivity biology.organism_classification Article lcsh:Chemistry Synthetic fiber lcsh:QD1-999 Chemical engineering Electrical resistivity and conductivity Polyamide Bacillus licheniformis SUBTILISIN A Diallyldimethylammonium chloride PA6.6 polyamide 6.6 fabric LbL layer-by-layer MWCNT multiwall carbon nanotubes DOC sodium deoxycholate PDDA poly(diallyldimethylammonium chloride) CNT carbon nanotubes SEM scanning electron microscopy MB methylene blue AO7 acid orange 7 Sheet resistance |
| Zdroj: | ACS Omega, Vol 4, Iss 7, Pp 12028-12035 (2019) ACS Omega |
| ISSN: | 2470-1343 |
| DOI: | 10.1021/acsomega.9b01052 |
| Popis: | Enzymatic modification, using a protease from Bacillus licheniformis (Subtilisin A), was carried out on polyamide 6.6 (PA6.6) fabric to make it more amenable to water-based nanocoatings used to impart electrical conductivity. The modified PA6.6 fibers exhibit a smoother surface, increased hydrophilicity due to more carboxyl and amino groups, and larger ζ-potential relative to unmodified polyamide. With its improved hydrophilicity and surface functionality, the modified textile is better able to accept a water-based nanocoating, composed of multiwalled carbon nanotubes (MWCNT) stabilized by sodium deoxycholate (DOC) and poly(diallyldimethylammonium chloride) (PDDA), deposited via layer-by-layer assembly. Relative to unmodified fabric, the enzymatically modified fibers exhibit lower sheet resistance as a function of PDDA/MWCNT-DOC bilayers deposited. This relatively green technique could be used to impart a variety of useful functionalities to otherwise difficult-to-treat synthetic fibers like polyamide. |
| Databáze: | OpenAIRE |
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