Effect of Wet-End Additives on the Results of Alkyl Ketene Dimer Sizing after Adding Bacterial Cellulose
Bacterial cellulose is a common research additive in the paper industry because it has unique and favorable characteristics. In this study, the effect of adding bacterial cellulose to an alkyl ketene dimer (AKD) sizing agent was investigated to optimize the dosage of bacterial cellulose, the retention system (cationic starch (CS), cationic polyacrylamide (CPAM)), and the sizing enhancement agents (polyamideamine-epichlorohydrin (PAE) and chitosan). The results showed that the addition of
... addition of bacterial cellulose had a negative effect on AKD sizing. Meanwhile, the addition of 5% bacterial fiber had a slight but negligible effect on paper sizing. The retention system improved AKD sizing and the dual retention system with CS, and CPAM improved sizing up to 60%. When 0.2% PAE and chitosan were added simultaneously, the sizing degree increased by 42.8% and 47.6%, respectively. Alkyl ketene dimer sizing," BioResources 11 (4) , 9280-9289. 9281 PEER-REVIEWED ARTICLE bioresources.com Yuan et al. (2016). "Alkyl ketene dimer sizing," BioResources 11(4), 9280-9289. 9282 PEER-REVIEWED ARTICLE bioresources.com Yuan et al. (2016). "Alkyl ketene dimer sizing," BioResources 11(4), 9280-9289. 9287 2. The addition of CS or CPAM increased the sizing degree of the paper. Compared to adding CS or CPAM individually, the dual retention system of CS and CPAM notably increased the sizing degree of the paper with BC. 3. The addition of PAE and chitosan in small dosages (0.2%) greatly improved the sizing of the paper. The optimal additions included CS, sizing enhancement agent, AKD, and CPAM in the appropriate locations.