Method for cleanly preparing cellulose nanocrystal through one-step method combining organic acid hydrolysis with nanometer microjet homogenization and product

The invention discloses a method for cleanly preparing cellulose nanocrystals through a one-step method combining organic acid hydrolysis with nano micro jet homogenization and a product. The method comprises the steps of: adding a cellulose raw material into an organic acid aqueous solution, and carrying out hydrolysis reaction to obtain a hydrolyzed fiber suspension; then filtering the hydrolyzed fiber suspension, and separating filtrate and filter residues; carrying out dialysis treatment on the filter residues by using deionized water, taking and diluting a reserved solution, and homogenizing through high-pressure microjet to obtain a nanocellulose mixed solution; and centrifuging the nanocellulose mixed solution, separating the supernate and the fiber precipitate, drying the supernate to obtain cellulose nanocrystals, and drying the fiber precipitate to obtain cellulose nanofibril. According to the method, no catalyst needs to be added, the used agent is safe and non-toxic, the reaction condition is rela