Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou 450002, China; Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Biofuel Research Team (BRTeam), Terengganu, Malaysia.
Department of Food Science and Technology, Faculty of Agriculture, Shahrood University of Technology, Shahrood, Iran.
Carbohydr Polym. 2022 Oct 15;294:119791. doi: 10.1016/j.carbpol.2022.119791. Epub 2022 Jun 28.
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 D 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）经过两种脂肪酸（癸酸（CA）和棕榈酸（PA））的改性。CS-PA 纳米凝胶的粒径（315.8nm）、Zeta 电位（31.8mV）和黏度（29.4mPa·s）均低于 CS-CA 纳米凝胶（793.2nm、53.3mV 和 70.7mPa·s）。首先，以 CS 为基础的颗粒/麦芽糊精（MD）稳定大麻籽油/W/O 型 Pickering 纳米乳液。然后，使用配备静电收集器的喷雾干燥器对乳液进行干燥。用 CS-PA/MD 包衣的再分散乳液粉末的 D 为 936nm。根据 FE-SEM 图像，与 CS-CA/MD 包衣相比，CS-PA/MD 包衣的油显示出更高的孔隙率和表面 C/O 比，导致更多的油泄漏。此外，用 CS-PA/MD 包衣的大麻籽油结晶度高于用 CS-CA/MD 包衣的结晶度。这些发现表明，通过对 CS 的靶向修饰和使用配备静电收集器的喷雾干燥器，可以获得亚微米级 Pickering 乳液粉末。
