Carbohydrate Polymers ( IF 10.7 ) Pub Date : 2022-06-28 , DOI: 10.1016/j.carbpol.2022.119791 Meisam Tabatabaei 1 , Behnam Ebrahimi 2 , Ahmad Rajaei 2 , Mohamad Hadi Movahednejad 3 , Hajar Rastegari 4 , Elham Taghavi 5 , Mortaza Aghbashlo 6 , Vijai Kumar Gupta 7 , Su Shiung Lam 8
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.
中文翻译:
配备静电收集器的喷雾干燥机生产亚微米壳聚糖稳定油皮克林乳液粉
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。