ISSN:
1435-1536
Keywords:
Layer silicic acids
;
organosilanes
;
grafting reactions
;
interlamellar compounds
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The grafting of organosilyl groups in the interlamellar space of certain crystalline silicic acids, such as H-magadiite, occurs when the interlayer spaces have been expanded previously by intercalation of some polar organic substances. The interlamellar Si-OH groups are then accessible to silylating reagents and Si-O-Si bridges form between the silicic acid surface and the organic groups. The grafting reaction is controlled by a diffusion mechanism: desorption of the polar organic guest molecules has to occur simultaneously with the diffusion of the reacting molecules into the interlayer space. The resulting materials are organosilicic compounds which retain the lamellar structure of the starting crystalline silicic acids. Their surface properties are determined by the grafted groups.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01410996
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