The mixture was allowed to stand for
30 min, making the total time for NaOH treatment was 45 min and then 240 mL of distilled water was added to the
mixture and allowed to standing for 1 h before filtering. Next, 800 mL of 8.3% NaOH solution was added into
cellulose for 5 min and rinsed with water. Then alkaline cellulose was neutralized by adding 120 mL of 10% acetic
acid.