Characterisation of White Metakaolin-Based Geopolymers Doped with Synthetic Organic Dyes
Over the years, many materials have been used to restore buildings, paintings, ceramics, and mosaic pieces exhibiting different types of dyes and colour hues. Recently, geopolymers have been used for restoration purposes owing to their high chemical and mechanical resistance. In this work, white met...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/16/3380 |
| _version_ | 1797408258812542976 |
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| author | Antonio D’Angelo Giovanni Dal Poggetto Simona Piccolella Cristina Leonelli Michelina Catauro |
| author_facet | Antonio D’Angelo Giovanni Dal Poggetto Simona Piccolella Cristina Leonelli Michelina Catauro |
| author_sort | Antonio D’Angelo |
| collection | DOAJ |
| description | Over the years, many materials have been used to restore buildings, paintings, ceramics, and mosaic pieces exhibiting different types of dyes and colour hues. Recently, geopolymers have been used for restoration purposes owing to their high chemical and mechanical resistance. In this work, white metakaolin was used to obtain white geopolymers, cured at 25 and 40 °C, as bulk materials to be coloured with synthetic organic dyes, i.e., bromothymol blue, cresol red, phenolphthalein, and methyl orange. These dyes were added during the fresh paste preparation to obtain dyed geopolymeric solids. Ionic conductivity and pH measurement confirmed the chemical stability of the consolidated materials, while FT-IR analyses were used to follow the geopolymerisation occurrences at different ageing times (from 7 to 56 days). Finally, the colour hues and properties were assessed in the CIELAB colour space before and after immersion in water. |
| first_indexed | 2024-03-09T03:55:50Z |
| format | Article |
| id | doaj.art-aa2d9f561af84b19a547b3da916ae412 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T03:55:50Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-aa2d9f561af84b19a547b3da916ae4122023-12-03T14:20:29ZengMDPI AGPolymers2073-43602022-08-011416338010.3390/polym14163380Characterisation of White Metakaolin-Based Geopolymers Doped with Synthetic Organic DyesAntonio D’Angelo0Giovanni Dal Poggetto1Simona Piccolella2Cristina Leonelli3Michelina Catauro4Department of Engineering, University of Campania “Luigi Vanvitelli”, Via Roma n. 29, 81031 Aversa, ItalyDepartment of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, Via P. Vivarelli 10, 41125 Modena, ItalyDepartment of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania “Luigi Vanvitelli”, Via Vivaldi 43, 81100 Caserta, ItalyDepartment of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, Via P. Vivarelli 10, 41125 Modena, ItalyDepartment of Engineering, University of Campania “Luigi Vanvitelli”, Via Roma n. 29, 81031 Aversa, ItalyOver the years, many materials have been used to restore buildings, paintings, ceramics, and mosaic pieces exhibiting different types of dyes and colour hues. Recently, geopolymers have been used for restoration purposes owing to their high chemical and mechanical resistance. In this work, white metakaolin was used to obtain white geopolymers, cured at 25 and 40 °C, as bulk materials to be coloured with synthetic organic dyes, i.e., bromothymol blue, cresol red, phenolphthalein, and methyl orange. These dyes were added during the fresh paste preparation to obtain dyed geopolymeric solids. Ionic conductivity and pH measurement confirmed the chemical stability of the consolidated materials, while FT-IR analyses were used to follow the geopolymerisation occurrences at different ageing times (from 7 to 56 days). Finally, the colour hues and properties were assessed in the CIELAB colour space before and after immersion in water.https://www.mdpi.com/2073-4360/14/16/3380metakaolinsynthetic organic dyesFT-IRCIELAB spaceXRDXRF |
| spellingShingle | Antonio D’Angelo Giovanni Dal Poggetto Simona Piccolella Cristina Leonelli Michelina Catauro Characterisation of White Metakaolin-Based Geopolymers Doped with Synthetic Organic Dyes Polymers metakaolin synthetic organic dyes FT-IR CIELAB space XRD XRF |
| title | Characterisation of White Metakaolin-Based Geopolymers Doped with Synthetic Organic Dyes |
| title_full | Characterisation of White Metakaolin-Based Geopolymers Doped with Synthetic Organic Dyes |
| title_fullStr | Characterisation of White Metakaolin-Based Geopolymers Doped with Synthetic Organic Dyes |
| title_full_unstemmed | Characterisation of White Metakaolin-Based Geopolymers Doped with Synthetic Organic Dyes |
| title_short | Characterisation of White Metakaolin-Based Geopolymers Doped with Synthetic Organic Dyes |
| title_sort | characterisation of white metakaolin based geopolymers doped with synthetic organic dyes |
| topic | metakaolin synthetic organic dyes FT-IR CIELAB space XRD XRF |
| url | https://www.mdpi.com/2073-4360/14/16/3380 |
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