Consolidation of Inorganic Precipitated Silica Gel

Polymers

Hussein Sahabi¹ 

[1] id="af1-polymers-03-01423">Karlsruhe Institute of Technology (KIT), Institute of Thermal Process Engineering, Kaiserstr. 12, 76128 Karlsruhe, Germa

关键词: consolidation;    oedometer;    reorganization;    shrinkage;    silica gel;    syneresis;   

DOI  :  10.3390/polym3031423

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.