Comparing Polymer-Supported TEMPO Mediators for Cellulose Oxidation and Subsequent Polyvinylamine Grafting
Citations Over TimeTop 10% of 2014 papers
Abstract
A new poly(acrylic acid)-grafted TEMPO (PAA-T) is compared to polyvinylamine-grafted TEMPO and free TEMPO as oxidation mediators for cellulose. The polymer-immobilized mediators require lower overall TEMPO concentrations and they restrict oxidation to the exterior surfaces of porous cellulose. On the other hand, the resulting surfaces are coated with grafted polyvinylamine and laccase, if the enzyme is used as the primary oxidant. PAA-T is anionic and does not sufficiently adsorb onto anionic cellulose to give oxidation, whereas cellulose rendered cationic by an adsorbed layer of PVAm is oxidized by PAA-T + laccase. There is no clear “best choice” mediator/primary oxidant combination for cellulose oxidation subsequent to PVAm grafting; the advantages of each mediator are summarized.
Related Papers
- → Study on the Graft Reaction of Poly(propylene) Fiber with Acrylic Acid(2006)20 cited
- XPS STUDY ON GRAFT POLYMERIZATION OF ACRYLIC ACID ONTO POLYETHYLENE FILMS BY γ-RADIATION(1993)
- STUDY OF THE ADSORPTION PERFORMANCE OF STARCH GRAFTING ACRYLIC ACID ADSORBENT AGAINST Cr(VI)(2001)
- Synthesis and Capability on Grafting Membrane of PVC With Acrylic Acid(2000)
- Study on the super absorbent prepared by chitosan grafting acrylic acid(2005)