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Decomposition of a cellulose fleece in nanofibrils with diameters ranging from several nm to around 30 nm could be realized by establishing a two-step process: the dispersion in sodium hydroxide solution followed by a mechanical dissociating step. This is supported by the crystal structure analysis, which indicates, with a refined crystallite size in the range of the fibril diameter, the decomposition of the cellulose in nanofibrils. The fiber length was largely preserved. [ABSTRACT FROM AUTHOR]

The frictional contact between grinding bodies is determined by a characteristic course of the coefficient of friction. This periodic course can be transferred by a fundamental energy approach in the occurring energy of friction wherein the maximum is located in the rising half and the minimum in the dropping half of one contact zone. Crucial influencing variables are the ball diameter as well as intrinsic effects. [ABSTRACT FROM AUTHOR]