| Abstract:The surfaces of OCC pulp fibers were successively coated with modified starch such as cationic starch and anionic starch based on layer-by-layer deposition technique. The effects of inorganic salt species, pulp concentration, and dosage of starch each time, adsorption time, pH and inorganic salt concentration on the starch adsorption on the pulp fiber surfaces were investigated. The experimental results showed that when aluminum chloride concentration was 108 mmol/L, the pulp concentration was 5.0%, the dosage of starch each time was 9 mg/g fiber, the adsorption time was 10 min and pH was 5.0，the adsorption of starch on the surfaces of OCC pulp fibers where three-layer starch has been deposited was 22.78 mg/g fiber and the starch retention rate reached 84.4%. The adsorping amount of starch increased by 180.89% compared with the control sample with the adsorption of monolayer cationic starch. |
