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TIP. Revista especializada en ciencias químico-biológicas
versión impresa ISSN 1405-888X
TIP vol.11 no.1 Ciudad de México jun. 2008
Artículos originales
Behaviour Of Amphiphilic Polysaccharides in Aqueous Medium
1Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS) affiliated with Joseph Fourier University, BP53, 38041 Grenoble cedex 9 (France). E-mail: marguerite.rinaudo@cermav.cnrs.fr
This paper describes the rheological and thermal behaviour of alkylated chitosan and hyaluronan derivatives and methylcellulose, Their behaviour is characterized by the formation of hydrophobic domains which may be considered as crosslinked points. Then, depending on the thermodynamic conditions (temperature, salt concentration), an aqueous solution transforms to a 3D-physical network formed on the basis of hydrophobic cooperative interactions.
Key Words: Alkylated chitosan; alkylated hyaluronan; amphiphilic polysaccharides; methylcellulose; rheological behaviour
Este trabajo describe el comportamiento reológico y térmico de quitosano y hialuronano alquilados y de metilcelulosa. Dicho comportamiento está caracterizado por la formación de dominios hidrofóbicos que pueden considerarse como puntos de entrecruzamiento. Por tanto, en dependencia de las condiciones termodinámicas (temperatura, salinidad), las disoluciones acuosas pueden transformarse en una red física tridimensional basada en interacciones cooperativas de carácter hidrofóbico.
Palabras Clave: Quitosano alquilado; hialuronano alquilado; polisacáridos anfifílicos; metilcelulosa; comportamiento reológico
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Received: May 02, 2008; Accepted: May 27, 2008