| Titre : |
Efficiency of surfactants in pigment dispersion |
| Type de document : |
texte imprimé |
| Auteurs : |
Pournima Abhijit Salve, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 55-70 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Additifs
Angle de contact
Concentration micellaire critique
Formulation (Génie chimique)
Mouillage (chimie des surfaces)
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
Tension superficielle
|
| Index. décimale : |
668.1 Agents tensioactifs : savons, détergents |
| Résumé : |
Surfactants encompass a variety of compounds that are used in various ways. The term 'surfactant' is derived from 'surface-active agents, and as the name implies, the compounds are used to alter surface phenomena. These chemicals will reduce surface tension and improve wetting and spreading (wetting agents); aid in dispersion of pigments in formulated products (dispersants); inhibit foam formation (defoamers) although others will stabilize foams; and cause or improve emulsion formation (emulsifiers). The performance of a surfactant in lowering the surface tension of a solution can be discussed in terms of the concentration required to produce a given surface tension reduction and the maximum reduction in surface tension that can be obtained regardless of the concentration. These are referred to as the surfactant efficiency and effectiveness respectively. |
| Note de contenu : |
- INTRODUCTION : Structure - Anionic surfactants - Cationic surfactants - Ampholytic surfactants - Non-ionic surfactants - Conditions under which interfacial phenomena and surfactants become significant - Working principle - Measurement of the critical micelle concentration (CMC) - Measurement of surface tension - Measurement of dynamic surface tension and interfacial tension - Measurement of contact angle - Contact angle - Process of pigment dispersion - Step on : pigment wetting - Step three : Stabilization - Role of surfactants in aqueous pigment dispersion - Mid-HLB stabilizing surfactants (grind aids or grind surfactants) - Low-HLB (wetting agents) - Solvent-free, low-VOC additives - Formulating with zero-voc multifunctional paint additives - A multifunctional additive - Formulation optimization pathway
- CONTRIBUTION TO PROPERTIES : Pigment wetting and dispersing - Color development - Washability and cleansability - Foam - Freeze-thaw stability - Volatile organic content (VOC) - Package or storage stability - Surface tension reduction - Emulsion stabilizer - Open-time extension - Dirt pickup - Resistance (DPR)
- OTHER SURFACTANTS |
| En ligne : |
https://drive.google.com/file/d/1asI4KI8zBdbugKoPsc0GMXr7-nVWowrC/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29331 |
in PAINTINDIA > Vol. LXVII, N° 9 (09/2017) . - p. 55-70
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Efficiency of surfactants in pigment dispersion in PAINTINDIA, Vol. LXVII, N° 9 (09/2017)
