Application behavior of spray dried powders such as reconstitution behavior and flowability is indirectly influenced by powder particle morphology. We here investigated the influence of the drying conditions and composition for whey protein (WP), maltodextrin (MD) and their mixtures on particle morphology during pilot-scale spray drying. Even though all powders showed a variety of morphologies, MD powders contained more wrinkled particles and had high bulk density, whereas pure WP powders contained more hollow particles. Mixture powders (75:25 WP:MD) show more hollow particles with increasing inlet temperature, with a lower bulk density. The observed morphologies for different formulations corresponded roughly to previous observations during sessile single droplet drying, but the results indicate that the morphology is also influenced by the faster pilot-scale drying, which was not evident in the slower single droplet drying.

中文翻译：

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麦芽糊精和乳清蛋白混合物喷雾干燥过程中的颗粒形态和粉末特性

喷雾干燥粉末的应用行为，例如重构行为和流动性，受到粉末颗粒形态的间接影响。我们在这里研究了乳清蛋白 (WP)、麦芽糖糊精 (MD) 及其混合物的干燥条件和成分对中试规模喷雾干燥过程中颗粒形态的影响。尽管所有粉末都表现出多种形态，但 MD 粉末包含更多的皱纹颗粒和高堆积密度，而纯 WP 粉末包含更多的空心颗粒。混合物粉末 (75:25 WP:MD) 随着入口温度的升高显示出更多的空心颗粒，同时具有较低的堆积密度。观察到的不同配方的形态大致对应于先前在固着单液滴干燥过程中的观察结果，