Tuning the physicochemical properties of polysaccharides with microporous and mesoporous structure

International Conference and Exhibition on Polymer Chemistry

November 14-16, 2016 Atlanta, USA

Lee D Wilson, Mohamed H Mohamed and John V Headley

University of Saskatchewan, Canada
Water Science and Technology Directorate- Environment Canada, Canada

Posters & Accepted Abstracts: J Material Sci Eng

Abstract :

Polyurethanes (PUs) were prepared by cross-linking �²-cyclodextrin (�²-CD) with two different types of diisocyanates, respectively. Materials with diverse structural and textural properties were obtained by varying the rate of diisocyanate addition: rapid (R) or drop-wise (D; 0.1 mL/min). Characterization of the structural and textural properties was investigated by spectroscopic (1H NMR in solution, solid state 13C CP-MAS solids NMR, dynamic light scattering, UV-vis, and IR), thermogravimetric analysis, powder x-ray diffraction, and scanning electron microscopy. The accessibility of the �²-CD inclusion sites of the polymers was independently evaluated using an equilibrium dye adsorption method at equilibrium and in parallel with a kinetic dye-based uptake method. The characterization methods strongly support that drop-wise additions affords materials with greater cross-linking relative to the rapid addition method. Herein, we report the first example of a cross-linked polyurethane containing �²-CD with tunable microporous and mesoporous structure and physicochemical properties according to the mode of cross-linker addition (R versus D) to control the reaction conditions shown in Scheme 1.

Biography :

Email: lee.wilson@usask.ca