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Polymers 2011, 3(3), 1423-1432; doi:10.3390/polym3031423

Consolidation of Inorganic Precipitated Silica Gel

Karlsruhe Institute of Technology (KIT), Institute of Thermal Process Engineering, Kaiserstr. 12, 76128 Karlsruhe, Germany
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Received: 25 July 2011 / Revised: 15 August 2011 / Accepted: 24 August 2011 / Published: 29 August 2011
(This article belongs to the Special Issue Polymer Nanogels and Microgels)
View Full-Text   |   Download PDF [612 KB, uploaded 29 August 2011]   |  

Abstract

Colloidal gels are possible intermediates in the generation of highly porous particle systems. In the production process the gels are fragmented after their formation. These gel fragments compact to particles whose application-technological properties are determined by their size and porosity. In the case of precipitated silica gels, this consolidation process depends on temperature and pH, among other parameters. It is shown that these dependencies can be characterized by oedometer measurements. Originally, the oedometer test (one-dimensional compression test) stemmed from soil mechanics. It has proven to be an interesting novel examination method for gels. Quantitative data of the time-dependent shrinkage of gel samples can be obtained. The consolidation of the gels shows a characteristic dependence on the above parameters. View Full-Text
Keywords: consolidation; oedometer; reorganization; shrinkage; silica gel; syneresis consolidation; oedometer; reorganization; shrinkage; silica gel; syneresis
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Sahabi, H.; Kind, M. Consolidation of Inorganic Precipitated Silica Gel. Polymers 2011, 3, 1423-1432.

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