Polysaccharide Ecocomposite Materials: Synthesis, Characterization and Application for Removal of Pollutants and Bacteria

摘要

A novel, simple and totally recyclable method has been developedfor the synthesis of nontoxic, biocompatible and biodegradablecomposite materials from cellulose and chitosan. In this method,[BMIm~+Cl~-], an ionic liquid (IL), was used as a solvent to dissolveand synthesize the [CEL+CS] composite materials. Since the ILcan be removed from the materials by washing them with water,and recovered from the washed solution, the method is totallyrecyclable. XRD, FTIR, NIR and SEM were used to characterizethe materials and to confirm that CEL and CS were successfullyregenerated by the method without any chemical transformation.More importantly, we have successfully demonstrated that[CEL+CS] material can serve as an effective adsorbent for removalof various endocrine disruptors including polychlorophenols andbisphenol A. This is because the composites have combinedadvantages of their components, namely superior chemical stabilityand mechanical stability (from CEL) and excellent adsorptioncapability for pollutants (from CS).