Dispersing nanoscaled pigments and fillers / Jochen Winkler in PAINTINDIA, Vol. LVIII, N° 6 (06/2008)

[article]  inPAINTINDIA > Vol. LVIII, N° 6 (06/2008) . - p. 105-118 Titre : Dispersing nanoscaled pigments and fillers Type de document : texte imprimé Auteurs : Jochen Winkler, Auteur Année de publication : 2008 Article en page(s) : p. 105-118 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Charges (matériaux) Dispersions et suspensions Pigments Index. décimale : 667.9 Revêtements et enduits Résumé : Nanoscaled pigments and functional fillers are becoming more and more important as ingredients in paints, plastics and rubbers. These additives can improve material performance dramatically and lead to special effects that are uniquely connected to their presence. Yet, in order to be useful, they normally have to be dispersed down to primary particle sizes. In many cases, this is a difficult task to achieve. The reason is that, as agglomerates become smaller and smaller, they lose inertia and move with the liquid components of the mill base, thus avoiding mechanical stress situations. The paper will deal with the aspects of dispersing in general, distinguishing between the probability for agglomerates to be stressed and the probability for them to break. For the case of bead mills, the connection between the mechanical power input and the degree of dispersion will be demonstrated and concepts for dispersing nanoparticles will be presented. Note de contenu : - Power input and dispersing time - Energy density distribution in the milling chamber - High speed attritor mills (bead mills) - Shear versus impact - Process control mechanical power - Attractive forces between primary particles - Influence of bead size on dispersion results - Small agglomerates avoid stress situations Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12121 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
010765	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Dispersing pigments and fillers / Jochen Winkler / Hannover [Germany] : Vincentz Network GmbH & Co. (2012)

Titre : Dispersing pigments and fillers Type de document : texte imprimé Auteurs : Jochen Winkler Editeur : Hannover [Germany] : Vincentz Network GmbH & Co. Année de publication : 2012 Collection : European Coatings Tech Files Importance : 208 p. Présentation : ill. Format : 23 cm ISBN/ISSN/EAN : 978-3-86630-852-7 Prix : 139 E Note générale : Index - Bibliogr. Langues : Français (fre) Catégories : Charges (matériaux) Dispersions et suspensions Pigments Index. décimale : 667.9 Revêtements et enduits Résumé : The Mission: To provide a fundamental understanding and grasping of the dispersing process - the pivodal step in paint production. From wetting of the solid surface, through mechanical destruction of the pigment agglomerates to stabilisation of the resultant particles against flocculation. An indispensable basis for understanding the dispersing process as a substantiated, scientifically proven technique. The Audience: Newcomers to the profession seeking a comprehensive grounding in the underlying physico-chemical principles as well as experts looking for more detailed information and new inspiration to grasp the complicated and seemingly confusing relationships in their entirety. All those seeking to acquire a deeper understanding of dispersing, from additive development to sophisticated millbase formulations to production optimisation. The Value: This book brings together the substantive knowledge of the physico-chemical principles behind the three separate steps involved in dispersing. Models are developed to enable the informed user to identify problems as they arise and to quickly rectify them. As well as being provided with all the necessary theory, the reader benefits from the wealth of practical advice distilled from the author’s vast experience. Note de contenu : 1. PHYSICAL INTERACTIONS OF ATOMS AND MOLECULES : Periodic table of the elements - Physical interactions - Energies and forces of attraction - Hydrogen bonds - Range of physical interaction energies - Interactions at interfaces 2. PROPERTIES OF PIGMENTS AND FILLERS : Dispersing and milling - Particle size determination - Interactions between pigment particles - Van der Waals attraction between particles - Surface treatment of pigments - Organic and inorganic pigments 3. WETTING OF PIGMENT SURFACES : Relevancy of wetting for the dispersion process - Surface tension - Young equation - Wetting of pigments - Mill base rheology and mill base optimization 4. DISPERSING EQUIPMENT : High speed impellers - Roller mills (three roll mill) - Kneaders and extruders - Bead mills (high speed attritors) - Determining dispersion time 5. MECHANICAL BREAKAGE OF AGGLOMERATES : Measuring dispersion success - Principle of mechanical brealage ; hammer-walnut experiment - Dispersion equation - Mechanical powder and dispersion results in bead mills 6. STABILIZATION AGAINST FLOCCULATION : Flocculation kinetics - Sedimentation - Potential curves - Electrostatic stabilization - Steric stabilization - Solubility parameters - Adsorption of polymers on pigment surfaces - Let-dow - Flocculation stabilization by rheology control Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16679

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14367	667.9 WIN	Monographie	Bibliothèque principale	Documentaires	Disponible

Titanium dioxide / Jochen Winkler / Hannover [Germany] : Vincentz Network GmbH & Co. (2003)

Titre : Titanium dioxide Type de document : texte imprimé Auteurs : Jochen Winkler, Auteur Editeur : Hannover [Germany] : Vincentz Network GmbH & Co. Année de publication : 2003 Collection : European Coatings Literature Importance : 128 p. Présentation : ill. Format : 23 cm ISBN/ISSN/EAN : 978-3-87870-148-4 Prix : 89 E Note générale : Index - Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de titane Index. décimale : 667.2 Colorants et pigments Note de contenu : - Physical, chemical and toxicological properties of titanium dioxide - Production of titanium dioxide pigments - Optical properties of titanium dioxide pigments - Photocatalytic properties of titanium dioxide - Dispersing of titanium dioxide - Nano titanium dioxide - Titanium dioxide in catalysis - Titanium dioxide in photovoltaic cells Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7323

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
2768	667.2 WIN	Monographie	Bibliothèque principale	Documentaires	Disponible

Zeta potential of pigments and fillers / Jochen Winkler in EUROPEAN COATINGS JOURNAL (ECJ), N° 1-2/97 (01-02/1997)

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 1-2/97 (01-02/1997) . - p. 38-42 Titre : Zeta potential of pigments and fillers Type de document : texte imprimé Auteurs : Jochen Winkler, Auteur Année de publication : 1997 Article en page(s) : p. 38-42 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Charges (matériaux) Electrocinétique (effets d'interface) Electrostatique Pigments Potentiel zeta Revêtements Solvants organiques Index. décimale : 667.9 Revêtements et enduits Résumé : This is a report on the charge behaviour of oxide pigments with amphoteric surfaces and precipitated barium sulphate as a typical representative of fillers which do not have any amphoteric groups on the particle surface. The mechanism of formation of electrostatic double layers of these substances is different in water than in organic solvents. Examples are given for the judicious influencing of the isoelectric point of amphoteric oxides through inorganic surface coatings. The applicational consequences are also discussed. Note de contenu : - Methods determinig Zeta potentials - Measuring the charge with the ESA instrument - Origins of electrostatic charges of pigments and fillers - Aqueous systems - Organic media Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11390 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
002523	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 4 / 4)