Description of Thermochromic Offset Prints Morphologies Depending on Printing Substrate
In this study, the influence of physio-chemical properties of four printing substrates, fibrous papers (filter, bulky, recycled), and polymer film (synthetic paper) on the size of the thermochromic (TC) prints microcapsules was investigated. Results indicate that interaction between thermochromic in...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/22/8095 |
| _version_ | 1797547837668458496 |
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| author | Mirela Rožić Nikola Šegota Marina Vukoje Rahela Kulčar Suzana Šegota |
| author_facet | Mirela Rožić Nikola Šegota Marina Vukoje Rahela Kulčar Suzana Šegota |
| author_sort | Mirela Rožić |
| collection | DOAJ |
| description | In this study, the influence of physio-chemical properties of four printing substrates, fibrous papers (filter, bulky, recycled), and polymer film (synthetic paper) on the size of the thermochromic (TC) prints microcapsules was investigated. Results indicate that interaction between thermochromic ink and printing substrate determine the print morphology, i.e., porosity and roughness of printing substrate affect dimensions of TC microcapsules of resulting prints, while ink adhesion affects dimensional changes during heating–cooling cycle. Atomic force microscopy (AFM) analysis showed that microcapsules of the prints, on the surface of the smoothest synthetic paper, possess the smallest diameter and height, while, on the most porous and the most roughened surface of F paper, the microcapsules of the prints possess the highest diameter and height. By increasing the temperature to 40 °C, the biggest changes in the shape of the microcapsules (increase in height and decrease in diameter) were obtained using the surface of the hydrophilic filter paper. While using the recycled paper surface, the situation is opposite; the height and diameter of the microcapsules are reduced, and the microcapsules penetrate deeper into the paper structure (due to optimum adhesion). On the bulky paper surfaces, which are more hydrophobic than recycled paper (higher interfacial tension), the increase of temperature does not cause any significant changes in the shape and position of the microcapsules. The same behavior is observed using hydrophobic non-porous synthetic paper. |
| first_indexed | 2024-03-10T14:49:56Z |
| format | Article |
| id | doaj.art-9b8b5d11dcfa4677b50033d18d0ec600 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T14:49:56Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-9b8b5d11dcfa4677b50033d18d0ec6002023-11-20T21:03:56ZengMDPI AGApplied Sciences2076-34172020-11-011022809510.3390/app10228095Description of Thermochromic Offset Prints Morphologies Depending on Printing SubstrateMirela Rožić0Nikola Šegota1Marina Vukoje2Rahela Kulčar3Suzana Šegota4Faculty of Graphic Arts, University of Zagreb, Getaldićeva 2, 10000 Zagreb, CroatiaFaculty of Science, University of Zagreb, Bijenička cesta 30, 10000 Zagreb, CroatiaFaculty of Graphic Arts, University of Zagreb, Getaldićeva 2, 10000 Zagreb, CroatiaFaculty of Graphic Arts, University of Zagreb, Getaldićeva 2, 10000 Zagreb, CroatiaRuđer Bošković Institute, Division of Physical Chemistry, Bijenička cesta 54, 10000 Zagreb, CroatiaIn this study, the influence of physio-chemical properties of four printing substrates, fibrous papers (filter, bulky, recycled), and polymer film (synthetic paper) on the size of the thermochromic (TC) prints microcapsules was investigated. Results indicate that interaction between thermochromic ink and printing substrate determine the print morphology, i.e., porosity and roughness of printing substrate affect dimensions of TC microcapsules of resulting prints, while ink adhesion affects dimensional changes during heating–cooling cycle. Atomic force microscopy (AFM) analysis showed that microcapsules of the prints, on the surface of the smoothest synthetic paper, possess the smallest diameter and height, while, on the most porous and the most roughened surface of F paper, the microcapsules of the prints possess the highest diameter and height. By increasing the temperature to 40 °C, the biggest changes in the shape of the microcapsules (increase in height and decrease in diameter) were obtained using the surface of the hydrophilic filter paper. While using the recycled paper surface, the situation is opposite; the height and diameter of the microcapsules are reduced, and the microcapsules penetrate deeper into the paper structure (due to optimum adhesion). On the bulky paper surfaces, which are more hydrophobic than recycled paper (higher interfacial tension), the increase of temperature does not cause any significant changes in the shape and position of the microcapsules. The same behavior is observed using hydrophobic non-porous synthetic paper.https://www.mdpi.com/2076-3417/10/22/8095thermochromic printsmicrocapsulesroughnessporosityadhesionpapers |
| spellingShingle | Mirela Rožić Nikola Šegota Marina Vukoje Rahela Kulčar Suzana Šegota Description of Thermochromic Offset Prints Morphologies Depending on Printing Substrate Applied Sciences thermochromic prints microcapsules roughness porosity adhesion papers |
| title | Description of Thermochromic Offset Prints Morphologies Depending on Printing Substrate |
| title_full | Description of Thermochromic Offset Prints Morphologies Depending on Printing Substrate |
| title_fullStr | Description of Thermochromic Offset Prints Morphologies Depending on Printing Substrate |
| title_full_unstemmed | Description of Thermochromic Offset Prints Morphologies Depending on Printing Substrate |
| title_short | Description of Thermochromic Offset Prints Morphologies Depending on Printing Substrate |
| title_sort | description of thermochromic offset prints morphologies depending on printing substrate |
| topic | thermochromic prints microcapsules roughness porosity adhesion papers |
| url | https://www.mdpi.com/2076-3417/10/22/8095 |
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