Nano Cellulosics: The Impact of Water on Their Dissolution
نویسندگان
چکیده
The dissolution behaviour of dissociated cellulosic materials – nanocrystalline, nanofibrillated, and microfibrillated specimen – in the analytically important system N,N-dimethylacetamide/ lithium chloride (DMAc/ LiCl) was investigated by means of gel permeation chromatography (GPC) with multiple detection. The impact of water present in the samples was addressed by Karl Fischer titration and solvent exchange experiments. Generally, dissolution of dissociated cellulosics is severely impeded as compared to their starting materials. This is most likely a consequence of the high-surface-area fibrils or crystals that are capable of retaining comparatively high amounts of water. With the increased understanding of the forces that hinder cellulose dissolution in DMAc/ LiCl and how to overcome them provided by this study, future molecular analysis of dissociated cellulosics are expected to become more reliable facilitating quality control of production procedures.
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