Chitosan (CS) was modified with two fatty acids, i.e., capric acid (CA) and palmitic acid (PA). Particle size (315.8 nm), zeta potential (31.8 mV), and viscosity (29.4 mPa.s) of CS-PA nanogels were lower than CS-CA nanogels (793.2 nm, 53.3 mV, and 70.7 mPa.s). First, hempseed oil-in-water Pickering nanoemulsions were stabilized by CS-based particles/maltodextrin (MD). Then, the emulsions were dried using an electrostatic collector-equipped spray dryer. The D₅₀ of re-dispersed emulsion powders with CS-PA/MD coating was 936 nm. According to the FE-SEM images, oil coated with CS-PA/MD showed higher porosity and C/O ratio at the particle surface compared to the CS-CA/MD coating leading to more oil leakage. In addition, the crystallinity of hempseed oil coated with CS-PA/MD was higher than the one coated with CS-CA/MD. These findings showed that submicron Pickering emulsion powders could be achieved by targeted modification of CS and using a spray dryer equipped with an electrostatic collector.

壳聚糖（CS）用两种脂肪酸改性，即癸酸（CA）和棕榈酸（PA）。CS-PA 纳米凝胶的粒径 (315.8 nm)、zeta 电位 (31.8 mV) 和粘度 (29.4 mPa.s) 低于 CS-CA 纳米凝胶 (793.2 nm、53.3 mV 和 70.7 mPa.s)。首先，通过基于 CS 的颗粒/麦芽糖糊精 (MD) 稳定了大麻籽水包油 Pickering 纳米乳液。然后，使用配备有静电收集器的喷雾干燥器干燥乳液。D ₅₀具有 CS-PA/MD 涂层的再分散乳液粉末的波长为 936 nm。根据 FE-SEM 图像，与 CS-CA/MD 涂层相比，涂有 CS-PA/MD 的油在颗粒表面表现出更高的孔隙率和 C/O 比，导致更多的漏油。此外，涂有CS-PA/MD的大麻籽油的结晶度高于涂有CS-CA/MD的大麻籽油。这些发现表明，通过对 CS 进行针对性改性并使用配备静电收集器的喷雾干燥器，可以获得亚微米 Pickering 乳液粉末。