Data: 02 de fevereiro
Título: “Cellulose Nanocrystal-a promising sustainable nanomaterial for environmental applications”.
Prof. Dr. Michael K.C. Tam, University of Waterloo, Canada.
Abstract: Cellulose nanocrystals (CNCs) are rod-like nanoparticles obtained by sulfuric acid hydrolysis of cellulose fibres. Several properties of CNCs, such as its availability, low cost, high mechanical strength, large number of surface functional groups, high surface area per volume and aspect-ratio have led to an increasing interest in using them for adsorption and controlled release applications. Pristine CNCs were incorporated into hydrogel beads in order to eliminate the need for centrifugation. CNCs used in these hydrogel beads were also functionalized and such effects on the adsorption and controlled release characteristics were examined. Preliminary results suggested that CNCs incorporated alginate hydrogel bead systems possessed attractive adsorption properties both in batch and fixed bed column adsorption systems. These hydrogel beads could be regenerated and reused if necessary. Such sustainable nanomaterials possess attractive characteristics for the removal of various types of contaminants in waste water systems.
Docente responsável: Watson Loh.