Facile chemo-refining approach for production of micro-nanofibrillated cellulose from bleached mixed hardwood pulp to improve paper quality
Varun K, Pathak P, Bhardwaj Nk
Carbohydrate Polymers 238(15): 116186
India
Micro nanofibrillated cellulose was prepared using bleached mixed hardwood pulp by a low energy consuming chemorefining approach having potential to be implemented easily in paper industry. Bleached mixed hardwood pulp was pretreated with sodium meta-periodate and sodium chlorite and micro-nanofibrillated by using refining in Valley beater. Scanning electron microscopy images of prepared micro-nanofibrillated cellulose showed 87 % fibre distribution in nano range, water retention value and carboxyl content. Carboxylation effect of given chemical pretreatment was further confirmed by FTIR analysis. Paper handsheets, having bleached mixed hardwood pulp and prepared micro-nano-fibrillated cellulose, resulted in about 5% lower bulk with 27%, 32% and 87% higher breaking length, burst factor and double fold, respectively than control (without nano-fibrillated cellulose). Prepared micro-nanofibrillated cellulose addition didn’t show negative effect on pulp drainability. This work showed that micro-nanofibrillated cellulose might also be prepared using conventional routes of paper industry to improve paper properties.
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