Abstract
Abstract Norway spruce (Picea abies) has been submitted to oscillatory ball milling at room temperature and at -196°C. The effects of moisture content (MC) and cryogenic milling on the morphology and crystallinity of cellulose were investigated. At room temperature, MC had a significant effect on particle morphology and it was possible to produce powders of smaller particle size and rounder shape when the wood feed had a lower MC. Under cryogenic conditions, MC had less influence on the morphology, and the particle size was even smaller than that produced under ambient conditions. The degree of cellulose crystallinity in the milled wood was influenced by the MC of the feed, milling time, and milling temperature.
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