| Titre : |
Electron microscope studies of leather-polymer systems |
| Type de document : |
texte imprimé |
| Auteurs : |
John R. Barlow, Auteur ; R. Reed, Auteur |
| Année de publication : |
1973 |
| Article en page(s) : |
p. 130-136 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cuirs et peaux -- Analyse
Cuirs et peaux -- Finition
Dispersions et suspensions
Emulsifiants
Emulsions
Latex
Microscopie électronique en transmission
pH
Polyacryliques
Polymères en émulsion
Polymérisation en émulsion
Tannage au chrome
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Polymeric materials may be applied to the surface of leather, as so-called finishes, to improve the appearance and performance characteristics of the substrate. The polymers used may be natural or synthetic in origin and are applied as solutions in organic solvents or as water-based emulsions. The latter systems are usually formed from acrylic polymers and are produced as spherical particles, dispersed in an aqueous phase, by the technique of emulsion polymerisation.
Transmission electron miroscopy has been used extensively to study the fine structure of leather and to characterise emulsion commonly used in leather finishing. However, with the exception of a single micrograph shown by Kanagy, studies of combined leather-polymer systems have not been carried out using this technique.
This article indicates a method of preparing leather-polymer systems for study in the electron microscope, giving information on the forces of interaction operative between the species present. |
| Note de contenu : |
Methods : Variation of time of contact between leather fibres and polymer particles - Variation of emulsion type and pH of leather-latex systems
- RESULTS : Variation of time of contact between leather fibres and polymer dispersions - Variation of emulsifier type and pH value of th eleather/latex system
- Fig. 1 : Full-chrome leather fibres plus latex 1. Time of contact in (a) less than 5 sec ; (b) 5 min ; (c) 20 min ; d) complete drying
- Fig. 2 : a) Full chrome leather fibres plus latex 2, complete drying. (b) As (a) but latex 3,5 min drying. IP = individual particle. (c) As (b) but complete drying
- Fig. 3 : Full-chrome leather fibres plus latex 1, with variation of the pH of the dispersion media. Time of contact = 1 min (a) pH 3.0 ; (b) pH 4.5 ; (c) pH 8.0
- Fig. 4 : Full-chrome leather fibres plus commercial anionic latex, with variation of the pH of the dispersion media. Time of contact = 1 min. (a) pH 3.0, lower magnification (scale mark = 2 microns) ; (b) pH 4.5 ; (c) pH 8.0 ; (d) pH 8.0, lower magnificatio (scale mark = 2 microns)
- Fig. 5 : Full-chrome leather fibres plus commercial non-ionic latex, with variation of the pH of the dispersion media. Time of contact = 1 min. (a) pH 3.0 ; (b) pH 4.5 ; (c) pH 8.0
- Table 1 : Properties of the test latices
- Table 2 : Commercial emulsions
- Table 3 : Surface charges on leather fibres and particles of test latices |
| En ligne : |
https://drive.google.com/file/d/1pqlM68oQTC4vttXNpQTexjHKo9lXB1eV/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31691 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 57 (Année 1973) . - p. 130-136
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Electron microscope studies of leather-polymer systems in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 57 (Année 1973)
