Holocellulose nanocrystals (holoCNC) with surface active properties were derived from sulfuric acid hydrolysis (64% H2SO4, 45 oC, 45 min) of holocellulose from rice straw to exhibit similar dimensions as their pure cellulose nanocrystal (CNC) counterparts, but in nearly doubled yield. The holoCNCs were more thermally stable at up to ca. 250 oC, but less charged and crystalline. The presence of hemicellulose on the holoCNCs demonstrated surface active properties, which was not observed on CNCs, to enable stabilization oil-in-water emulsions, forming emulsion droplets with size ranging from 1-2 �m with good stability. Such surface active properties were confirmed by fluorescence spectroscopy and surface tension measurement. The holoCNCs cellulose self-assembled upon by freeze-drying and oven drying to different morphologies and porous structures than those from CNC. The streamlined isolation method in generating holoCNCs presents a more efficient process as well as additional unique characteristics and properties for new applications. 

Novel surface active holocellulose nanocrystals

248th National Meeting (2014)

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