Stovbun Sergey V, Mikhaleva Mariya G, Skoblin Aleksey A, Usachev Sergey V, Nikolsky Sergey N, Kharitonov Vasily A, Kovaleva Kseniya I, Politenkova Galina G, Vedenkin Alexander S, Zlenko Dmitry V
N.N. Semenov Institute of Chemical Physics, RAS, Kosygina 4, 119991 Moscow, Russia.
Faculty of Biology, M.V. Lomonosov Moscow State University, Lenin Hills 1/12, 119192 Moscow, Russia.
Polymers (Basel). 2020 Dec 10;12(12):2952. doi: 10.3390/polym12122952.
Microcrystalline cellulose (MCC) is a chemically pure product of cellulose mechano-chemical conversion. It is a white powder composed of the short fragments of the plant cells widely used in the modern food industry and pharmaceutics. The acid hydrolysis of the bleached lignin-free cellulose raw is the main and necessary stage of MCC production. For this reason, the acid hydrolysis is generally accepted to be the driving force of the fragmentation of the initial cellulose fibers into MCC particles. However, the low sensibility of the MCC properties to repeating the hydrolysis forces doubting this point of view. The sharp, cleave-looking edges of the MCC particles suggesting the initial cellulose fibers were fractured; hence the hydrolysis made them brittle. Zhurkov showed that mechanical stress decreases the activation energy of the polymer fracture, which correlates with the elevated enthalpy of the MCC thermal destruction compared to the initial cellulose.
微晶纤维素（MCC）是纤维素机械化学转化的化学纯产物。它是一种白色粉末，由植物细胞的短片段组成，广泛应用于现代食品工业和制药领域。漂白后的无木质素纤维素原料的酸水解是MCC生产的主要且必要阶段。因此，酸水解通常被认为是初始纤维素纤维破碎成MCC颗粒的驱动力。然而，MCC性能对重复水解的低敏感性使人对这一观点产生怀疑。MCC颗粒尖锐、似劈开的边缘表明初始纤维素纤维发生了断裂；因此水解使其变脆。朱尔科夫表明机械应力会降低聚合物断裂的活化能，这与MCC热分解焓相比初始纤维素升高相关。
