A novel method for producing micro- and nanoparticles of cellulose by phase separation of its solutions in the mixture of N-methylmorpholine N-oxide and dimethyl sulfoxide initiated by cooling or adding a precipitant has been suggested. The effect of the nature of the precipitant (water, methanol, or butanol) on the size and crystallinity of cellulose particles as well as their ability to act as thickeners has been investigated. In all cases, the regenerated cellulose was amorphous in nature, while only the use of alkaline water for precipitation allowed producing nanoscale particles of nanocellulose. Rheological properties of aqueous and alcoholic dispersions containing cellulose with concentration up to 3% have been considered. It turned out that the size and origin of the cellulose particles had very little effect on the rheology of the dispersions, which exhibited typical gel properties. Synthesized nanocellulose was used then as a thickener agent to obtain biodegradable low-temperature greases based on polar base oil—triethyl citrate. Tribological and rheological properties of the resulting lubricants have been investigated. Introduction of 7% nanocellulose made it possible to obtain a grease of medium consistency with high wear protection and low friction coefficient under high loads.

一种通过在N-甲基吗啉N-已经提出通过冷却或添加沉淀剂引发的氧化物和二甲基亚砜。已经研究了沉淀剂（水、甲醇或丁醇）的性质对纤维素颗粒的尺寸和结晶度以及它们作为增稠剂的能力的影响。在所有情况下，再生纤维素本质上都是无定形的，而只有使用碱性水进行沉淀才能产生纳米纤维素的纳米级颗粒。已经考虑了含有浓度高达 3% 的纤维素的水分散体和醇分散体的流变特性。结果表明，纤维素颗粒的大小和来源对分散体的流变学影响很小，分散体表现出典型的凝胶特性。然后使用合成的纳米纤维素作为增稠剂，获得基于极性基础油——柠檬酸三乙酯的可生物降解的低温润滑脂。已经研究了所得润滑剂的摩擦学和流变学特性。7% 纳米纤维素的引入使得在高负载下获得具有高耐磨保护和低摩擦系数的中等稠度的润滑脂成为可能。