Effects of pre-treatment by betaine-oxalic acid based deep eutectic solvent on manufacturing efficiency of microfibrillated cellulose

초록

This study was conducted to investigate the effects of deep eutectic solvent (DES) applied pre-treatment on the MFC manufacturing efficiency of hardwood bleached kraft pulp (HwBKP). DES was prepared by mixing of betaine and oxalic acid dihydrate (B and O), and the molar ratio of these two components mixtures was controlled to 1:1 (B:0=l:l). As results, grinding without BO DES pre-treatment shows the higher fiber fibrillation than that pre-treated with BO DES. And the energy that required to produce the MFC slurry having a same level of viscosity was slightly more consumped in case of BO DES pre-treatment than the case without pre-treatment. In other hand, the viscosity of the HwBKP fiber was decreased by BO DES pre-treatment but the viscosity of the HwBKP fiber treated with BO DES was less reduced by grinding than that without BO DES pretreatment. Namely, it was found that BO DES pre-treatment diminished the cellulose degradation by grinding.

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