By Lars Bergström, Ariel Goobar
Regardless of the obvious simplicity of silica’s composition and constitution, scientists are nonetheless investigating primary questions concerning the formation, structure, and behaviour of colloidal silica platforms. Colloidal Silica: basics and functions introduces new info on colloid technological know-how concerning silica chemistry in addition to theoretical and experimental elements of important components of colloidal silica technology and know-how. This source is devoted to assisting researchers locate new makes use of of silica and solutions to functional difficulties as its business use maintains to develop gradually in conventional and novel components.
Written by means of top silica scientists worldwide, this e-book displays advancements within the box on account that silica scientist Ralph ok. Iler released his authoritative booklet on silica chemistry in 1979. It discusses houses and strategies of characterization, synthesis, and guidance of silica by way of business functions. Following an research of the outside chemistry of assorted silicas, the ebook explores equipment for measuring particle dimension and invaluable characterization options for deciding upon constitution, balance, and reactivity. The authors then concentrate on a number of reports, analytical tools, and present functions concerning silica gels and powders, silica coatings, colloidal silica, and sol-gel know-how.
Colloidal Silica: basics and functions beneficial properties up to date fabric in relation to fields as varied as catalysis, metallurgy, electronics, glass, ceramics, paper and pulp know-how, optics, elastomers, nutrients, health and wellbeing care, and commercial chromatography. it truly is perfect for scientists attracted to silica chemistry and physics in addition to these no longer conversant in the topic.
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Regardless of the plain simplicity of silica’s composition and constitution, scientists are nonetheless investigating basic questions concerning the formation, structure, and behaviour of colloidal silica structures. Colloidal Silica: basics and functions introduces new details on colloid technological know-how relating to silica chemistry in addition to theoretical and experimental facets of vital parts of colloidal silica technology and know-how.
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Additional info for Colloidal Silica: Fundamentals and Applications
Brinker’s chapter in this book includes a clear explanation of the difference between hydrolysis and condensation of aqueous silicates and silicon alkoxides. A. Keiser’s contribution to this book (the introduction to the section “Preparation and Stability of Sols”) constitutes an excellent introduction to silica nucleation, polymerization, and growth in both aqueous and alcoholic systems for the preparation of silica sols. Yoshida’s chapter (Chapter 6) focuses on industrial development in the preparation of monodisperse sols from sodium silicate and predicts further progress in the development of silica sols that have shapes other than spherical, such as elongated, fibrous, and platelet.
11). © 2006 by Taylor & Francis Group, LLC . . . . single silanol groups, also known as free or isolated silanols silanediol groups, also called geminal silanols silanetriols; postulated but real existence not yet generally accepted hydrogen-bonded vicinal silanols (single or geminal), including terminal groups internal silanol groups involving OH groups, sometimes classified as structurally bound water strained and stable siloxane bridges and rings physically adsorbed H2O hydrogen-bonded to all types of surface silanol groups Silanol groups are formed on the silica surface in the course of its synthesis during the condensation – polymeization of Si(OH)4 or as a result of rehydroxylation of thermally dehydroxylated silica when treated with water or aqueous solutions (Scheme I).
Colloidal Silica — Stability and Aggregation . . . Gelation, Coagulation, Flocculation, and Coacervation . . . . . . . . Fractal Approach to Colloid Systems . . . . . . Silica Nucleation, Polymerization, and Growth: Preparation of Monodisperse Silica Sols. . . . . Stability of Silica Sols . . . . . . . . . . . . Silica Surface . . . . . . . . . . . . . . . . Silanol Groups, Siloxane Bridges, and Physically Adsorbed Water . . . . . . . . . .