Application of amphoteric cassava dregs in ONP and its impacts on retention, drainage and paper physical strength

作者：Liu, Wen-Jing; Wu, Shu-Bin^*; Tao, Zheng-Yi

来源：Chemistry and Industry of Forest Products, 2014, 34(2): 61-66.

DOI：10.3969/j.issn.0253-2417.2014.02.011

• Breaking length
• Carboxymethylation
• Cassava dregs
• Fines retention
• ONP
• Paper strengths
• Physical strength
• Retention and drainage

The carboxymethylation pretreated cassava dregs grafted acrylamide and [2-methacryloyloxy] trimethylammonium chloride(CMPCD-g-AD)was used in deinked pulp. The effects of the factors, including CMPCD-g-AD dosage, pH value, conductivity, and shearing force, on the retention, pulp drainage and handsheet physical properties were studied in this study. The results showed that the optimal retention and drainage could be obtained as the dosage of CMPCD-g-AD is 1.2%, and the maximum value of drainage and first pass the retention (FPR) of recycled pulp is 244.6 g in 60 s and 90.46%, respectively. The best pulp retention was acquired at pH 8.5, and it decreased as the pH value was over 8.5. Hence, the CMPCD-g-AD was suitable for applying in a nearly pH-neutral solution. The increasing of salt content had a adverse effect on drainage and the fines retention decreased slightly by 3.8%. Shear force was negative for FPR, therefore, outlet of screen was proposed to be the point for adding CMPCD-g-AD. CMPCD-g-AD showed a significant positive impact on paper strength. The tensile index, burst index, tear index and breaking length were increased by 104.38%, 12.77%, 12.95% and 88.58%, respectively.

• 出版日期2014-4
• 单位华南理工大学