Cellulose nanocrystals prepared in H3PW12O40-acetic acid system

Recent Strategies in Preparation of Cellulose Nanocrystals and Cellulose Nanofibrils Derived from Raw Cellulose Materials

“…Further research results showed that the reaction time was significantly shortened under the optimal conditions, and the obtained CNCs had a high crystallinity index (79.6%) with a 84% yield [78]. Torlopov et al also reported a CNCs preparation process using phosphotungstic acid/acetic acid system to destruct cotton cellulose [79]. The resulting CNCs have high-crystalline structure and rod-like morphology.…”

A Fenton-like System (Cu(II)/H2O2) for the Preparation of Cellulose Nanocrystals with a Slightly Modified Surface

“…The colloidal properties, problems of formation, and structure of the electrical double layer (EDL) of CNC particles are largely determined by the structure of the hydroxyl shell of the particles. Potentiometric titration is successfully used to study active acid–base surface CNC centers in electrolyte solutions. , To characterize the basic and acid centers on the surface of the CNC particles, this method was applied by us in conjunction with a mathematical model, pK spectroscopy . This model allows one to calculate constants of surface complexation (p K i ) of the adsorption surface centers in agreement with their ability to transform into acid (p K 2 ) or basic (p K 1 ) forms, due to processes with proton transfer, regulated by the pH of the medium.…”

Sustainable preparation of cellulose nanocrystals: state of the art and perspectives

“…In addition, the obtained CNCs displayed a high crystallinity index of 79.6% and good thermal stability ( T max = 348 °C). In another study, Torlopov et al 80 proposed a novel method for the preparation of CNCs by the destruction of MCC by HPW in an acetic acid medium in the presence of H 2 O 2 . It was found that the obtained CNCs showed a rod-like morphology with lengths of 200–300 nm and 8–10 nm in diameter.…”