3.6 Application of cationic nanocellulose in papermaking

Paper manufacturers are often looking for ways to improve the paper's strength qualities, and they have recently focused on cellulose micro- and nanofibrils to do so. In this research work, we have studied the role of cationic modified cellulose and nanocellulose as additive in paper making. The main goal, however, is to employ cationic additives that are environmentally friendly manner. Cationic additives are typically synthesized by introducing cationic groups through a series of chemical reactions. The reactions can be considered more desirable by incorporating them into potentially green systems based on non-toxic and readily biodegradable deep eutectic solvents (DESs). Three different amounts of green cellulose based cationic additive (2%, 5%, and 10%) were added to conventional softwood kraft fibres, and then dewatering as well as the mechanical strength of paper sheets were studied. Since increasing the additive content can affect the dewatering properties of the pulp, the dewatering capabilities of these three types of pulp has been evaluated by Schopper-Riegler (°SR) value, Water retention value (WRV) and Vacuum dewatering which simulating the dewatering processes used in paper machines. Finally, the recyclable DES was assessed in terms of cationization reaction efficiency and the paper mechanical properties. Preliminary results show an increase in tensile properties of the sheets and no significant effects on drainage according to Schopper-Riegler measurements.