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Type: Artigo de periódico
Title: O relevante papel do agente sililante na modificação de superfícies de polímeros
Title Alternative: The considerable role of silylant agent in polymer surface modification
Author: Arakaki, Luiza N. H.
Airoldi, Claudio
Abstract: The applicability of the silylant agents of the general formula Y3Si-R-X, depends on the reactivity of Y group (halide or alcoxide) attached to silicon and the organic function X (halide, amine, thiol, cyanide, etc) in the extreme position of the chain. Both groups are linked together by an organic chain R, containing usually three methylene groups. A series of these agents can be covalently bonded to an inorganic matrix, since the available OH groups are distributed on the surface, making silica gel the most common support. However, other inorganic oxides, zeolites, lamellar inorganic phosphates and chrysotile can also have these agents anchored. Some illustration are presented for immobilized surface in the use as extractors of cations from dilute aqueous or non-aqueous solutions, catalysts agents, ionic exchanged materials, support for enzyme immobilization, chromatographic applications, use in some industrial features and in many other areas. The evolution of this exciting research field to produce new materials, for many tecnological applications, is strongly dependent on the development of a sensible systematic process for the synthesis of a series of new specific silylant agents.
Subject: silylant agent
silica gel
inorganic support
Editor: Sociedade Brasileira de Química
Citation: Química Nova. Sociedade Brasileira de Química, v. 22, n. 2, p. 246-253, 1999.
Rights: aberto
Identifier DOI: 10.1590/S0100-40421999000200016
Date Issue: 1-Apr-1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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