Disk-like nanocrystals prepared by solvolysis from regenerated cellulose and colloid properties of their hydrosols

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

“…It should be noted that our previous results on the aggregative stability of various CNC, for example, prepared in phosphotungstic acid/acetic acid (80 mM KCl) and disc-like CNC with crystals structure of cellulose II (53 mM KCl), are in very good correlation with these data. The similarities of all these CNC sols are in their unmodified surface (close to native).…”

“…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.…”

“…The critical coagulation concentration (CCC) was determined by the coagulation rate. , Change in the optical density of sols with time in the first seconds was used to determine the coagulation rate . CNC sols with a KCl concentration of ≥0.05 M (Figure S5) undergo fast change in optical density (Δ A ) during the first seconds and then reach a plateau.…”

“…Colloidal Stability of CNC Sol. Colloidal stability was determined via previously reported methods 32,37 using change in absorbance at a wavelength of 560 nm over time depending on the electrolyte concentration and dependence of zeta potential and apparent size versus KCl concentration.…”

Environmentally friendly Au@CNC hybrid systems as prospective humidity sensors

“…Polysaccharides are well-known for their safety, biocompatibility and non-toxicity, and have been used as a fundamental material in human-related applications for a long time. [3][4][5] By downsizing polysaccharide-based materials to the nanoscale, they have high specic surface area, high dispersibility, and high stability, 6,7 making them viable catalyst carriers, 8 coatings, 9 membranes, 10 and drug delivery systems 11,12 among other uses. Bulk and microcrystalline polysaccharidebased materials lack these advantages.…”