无机盐协同淀粉多层包覆OCC浆纤维对淀粉吸附量的影响

The Effect of Inorganic Salt on the Starch Adsorption on the OCC Fibers by Starch Deposition Technique

关键词:  OCC浆  层层沉积技术  阳离子淀粉  阴离子淀粉  淀粉吸附量

Key Words:OCC fibers  layer-by-layer deposition technique  cationic starch  anionic starch  starch adsorption

摘要:基于聚电解质层层沉积技术，通过在OCC浆纤维表面进行阳离子淀粉与阴离子淀粉交替包覆的方法，研究了无机盐种类、每次包覆的淀粉用量、纸浆浓度、每次包覆吸附时间、pH值和无机盐浓度对OCC浆纤维表面淀粉吸附量的影响。结果表明，无机盐协同淀粉3层包覆OCC浆纤维的适宜工艺条件为：AlCl3浓度108 mmol/L，纸浆浓度5.0%，每次包覆吸附时间10 min，每次淀粉用量9 mg/g纤维，pH值5.0。在适宜的工艺条件下，无机盐协同淀粉3层包覆OCC浆纤维表面淀粉吸附量为22.78 mg/g纤维，其纤维表面的淀粉保留率为84.4%，与吸附单层阳离子淀粉的试样相比较，AlCl3协同淀粉包覆OCC浆纤维表面淀粉吸附量增加了180.89%。

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.