Alkali Lignin/Cellulose Nanofibrils Drying System for Efficient Redispersion Process
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초록
내용
Recently, cellulose nanofibrils(CNFs) have been actively applied in high-tech industrial fields due to the advantages of their lightness and excellent mechanical properties. However, the aggregation of CNFs occurring during the drying process and the resulting collapse of the nanostructure makes it very difficult to store and transport CNFs, thus preventing actual industrialization. In this study, using alkali lignin, a constituent of wood, as an eco-friendly additive, a simple “AL/CNFs drying system” was developed. The morphological characteristics of dried AL/CNFs were observed through FE-SEM, and the degree of redispersion of CNFs was confirmed through the specific surface area and rhelogical properties. From the results, AL prevented CNFs from self-aggregation by forming strong hydrogen bonds during the drying process. In addition, AL could be simply removed by washing process, and as a result, the redispersion kinetics and stability of dried CNFs could be dramatically increased.