Interaction of chitosan biopolymer with silica nanoparticles as a novel retention/drainage and reinforcement aid in recycled cellulosic fibers

Evaluating effects of activated sludge and nanochitosan on physical and strength properties of recycled pulp

“…Significant changes after modification in different bands were attributed to different components, which include cellulose, hemicellulose, and lignin. The decrease in spectrum intensity at 3300 cm -1 wavelength due to treatment can be attributed to hydroxyl (OH) groups (Sabazoodkhiz et al 2017). The hydroxyl tensile region is of particular importance for explaining hydrogen bonding patterns (Clausen et al 2010) (Fig.…”

“…In general, given the biodegradable nature of chitosan, it is obvious that chitosan can be a viable alternative to the production of environmentally friendly papers (Song et al 2018). Sabazoodkhiz et al (2017) in the study of the interaction of chitosan biopolymer with silica nanoparticles as a strengthening agent and preservative in recycled cellulose fibers, showed that this system improves the drainage process and preserves fillers and fibers.…”

Application of Chitin/Chitosan and Their Derivatives in the Papermaking Industry

“…There are two kinds of paper strength agents, including synthetic polymers and natural renewable polymers, used most frequently in the papermaking industry. Among the bio-based renewable polymers, chitosan with important functional groups such as hydroxyl, amino, and even acetamido groups has been found to be effective as a dry strength agent in the papermaking industry [28,37,40,41,42,43,44,45,46,47,48]. The structure of chitosan is similar as cellulose, making it possible to have strong bonding with fibers thus giving a dry and wet strength in papermaking.…”

“…When the chitosan was modified by introducing a quaternary ammonium group, the modified chitosan became soluble in both neutral and alkaline solutions and obtained good mineral binding properties, which is required for anchoring the mineral to the fibers. Furthermore, dual- or multi-component retention systems involving chitosan, such as a chitosan/bentonite particulate retention system, chitosan/silica (SiO 2 ) retention system [ 36 , 37 ], and chitosan/cellulose nanofiber (CNF) retention system, have also been used in the papermaking process [ 38 , 39 ]. Quaternary chitosan (QCS)/nano-SiO 2 retention aid system has been used in flocculation of reed pulp suspension [ 36 ].…”

“…The effect on the fiber flocculation of electrolyte concentration in the QCS-nano-SiO 2 system was governed not only by the adsorption of QCS onto the substrate surface but also by the interaction between polyelectrolyte and nano-SiO 2 particles [ 36 ]. Chitosan with a nano-silica retention/drainage system used in recycled cellulosic fibers was studied [ 37 ] and the results showed that retention and drainage in recycled waste office pulp was significantly improved in comparison to the control sample. The effect of chitosan/bentonite particulate retention system on the retention and drainage performance of the tobacco pulp, which was used to make tobacco sheets using papermaking technology, was studied [ 38 ].…”