Case Studies of Physical and Chemical Gels Based on Microbial Polysaccharides

Author:

Crescenzi V.1,Dentein M.1,Simvi F.1,Paci M.2,Paradossi G.2,Bellini D.3,Righetto Z.3

Affiliation:

1. Department of Chemistry, La Sapienza University, Ple A.Moro 5, 00185 Rome, Italy

2. Department of Chemistry, Tbr Vergata University, Rome, Italy

3. Fidia Advanced Biopolymers, SrL, Abano Terme (PD), Italy

Abstract

Microbial anionic polysaccharides, although structurally closely related, exhibit strikingly different gelling properties in aqueous media (physical gels formation). Experimental observations are traced to differences, minor differences in some instances, in primary structures. Chemical gels have been prepared using deacylated gellan by means of an interchain partial esterification procedure, and a sample subjected to preliminary characterization in terms of swelling properties. NMR water proton relaxation data show that such amples display a remarkable water retention capability.

Publisher

SAGE Publications

Subject

Materials Chemistry,Polymers and Plastics,Biomaterials,Bioengineering

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