Simultaneously Tailoring Surface Energies and Thermal Stabilities of Cellulose Nanocrystals Using Ion Exchange: Effects on Polymer Composite Properties for Transportation, Infrastructure, and Renewable Energy Applications.
作者： Douglas M. Fox , Rebeca S. Rodriguez , Mackenzie N. Devilbiss , Jeremiah Woodcock , Chelsea S. Davis
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摘要: Cellulose nanocrystals (CNCs) have great potential as sustainable reinforcing materials for polymers, but there are a number of obstacles to commercialization that must first be overcome. High levels water absorption, low thermal stabilities, poor miscibility with nonpolar and irreversible aggregation the dried CNCs among greatest challenges producing cellulose nanocrystal–polymer nanocomposites. A simple, scalable technique modify sulfated (Na-CNCs) has been developed address all these issues. By using an ion exchange process replace Na+ imidazolium or phosphonium cations, surface energy is altered, stability increased, polymer (epoxy polystyrene) enhanced. Characterization resulting exchanged (IE-CNCs) potentiometry, inverse gas chromatography, dynamic vapor sorption, laser scanning confocal microscopy reveals IE-CNCs lower...
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