Microparticles embedded with cellulose nanofibers (CNFs) are produced via spray drying. The microdroplets are created in the spray dryer by atomization. The solvent evaporates from the droplet, and the dried particles are formed. The drying kinetics on the scale of one droplet is still not well understood. Drying of a single droplet CNF suspension was investigated in an acoustic levitator. The drying kinetics and morphology evolution during the drying process were obtained. The reaction engineering approach (REA) model provided a reasonable prediction of the drying kinetics. An absolute relative error of 2.5 % between the measured initial mass of the droplet and the REA model's estimated value was reported.

中文翻译：

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纤维素纳米纤维的喷雾干燥：单个液滴和颗粒形成的干燥动力学建模

嵌入纤维素纳米纤维 (CNF) 的微粒是通过喷雾干燥生产的。通过雾化在喷雾干燥器中产生微滴。溶剂从液滴中蒸发，形成干燥的颗粒。一滴规模的干燥动力学仍不清楚。在声学悬浮器中研究了单液滴 CNF 悬浮液的干燥。获得了干燥过程中的干燥动力学和形态演变。反应工程方法 (REA) 模型提供了对干燥动力学的合理预测。据报道，液滴的测量初始质量与 REA 模型的估计值之间的绝对相对误差为 2.5%。