Department of Food Science and Biotechnology, Dongguk University-Seoul, Goyang, Gyeonggi 410-820, Republic of Korea.
Department of Food Science and Biotechnology, Dongguk University-Seoul, Goyang, Gyeonggi 410-820, Republic of Korea.
Int J Biol Macromol. 2021 Jun 30;181:232-240. doi: 10.1016/j.ijbiomac.2021.03.142. Epub 2021 Mar 26.
Understanding the agglomeration of cellulose derivatives is crucial for the production of instant gum-based food thickeners. In the present study, physical, rheological, and structural properties of agglomerated water-soluble cellulose gums (CGs), such as carboxymethylcellulose (CMC), hydroxypropylmethylcellulose (HPMC), and methylcellulose (MC), were investigated at different concentrations of maltodextrin (MD) as a binder for fluidized-bed agglomeration. Among the CG agglomerates in the presence of MD, CMC exhibited better flowability and lower cohesiveness, showing lower Carr index and Hausner ratio values. The MC agglomerates with 20% MD exhibited higher porosity than the other CGs due to the size enlargement of MC particles, which was confirmed via scanning electron microscopy images and size distribution profiles. The dynamic moduli of the CG agglomerates were significantly decreased by the addition of MD and also decreased with increasing MD concentration. The tan δ values of the agglomerates increased with increasing MD concentration, indicating the enhancement of their viscous properties. These results suggest that the physical, rheological, and structural properties of cellulose derivatives with different types of CG can be greatly influenced by their agglomerate growths during fluidized-bed agglomeration of particles with the different concentrations of MD binder.
理解纤维素衍生物的团聚对于生产即时胶基食品增稠剂至关重要。在本研究中，研究了不同浓度麦芽糊精（MD）作为流化床团聚的粘结剂时，水不溶性纤维素胶（CG）如羧甲基纤维素（CMC）、羟丙基甲基纤维素（HPMC）和甲基纤维素（MC）的物理、流变和结构性质。在 MD 存在下的 CG 团聚体中，CMC 表现出更好的流动性和更低的内聚性，表现出更低的 Carr 指数和 Hausner 比值。由于 MC 颗粒尺寸的增大，添加 20% MD 的 MC 团聚体的孔隙率高于其他 CG，这通过扫描电子显微镜图像和粒径分布图谱得到了证实。添加 MD 显著降低了 CG 团聚体的动态模量，并且随着 MD 浓度的增加而降低。团聚体的 tan δ 值随 MD 浓度的增加而增加，表明其粘性特性增强。这些结果表明，不同类型 CG 的纤维素衍生物的物理、流变和结构性质可以通过其在不同浓度 MD 粘结剂的流化床颗粒团聚过程中的团聚生长而受到极大影响。
