作　　者： ; ; ; ;

机构地区： 华南理工大学轻工与食品学院制浆造纸工程国家重点实验室

出　　处： 《中国造纸》 2008年第12期11-15,共5页

摘　　要： 研究了纳米TiO2单元体系与纳米TiO2-两性淀粉（Amphoteric Starch，AmS）双元体系对脱墨浆（100％DIP）抄造新闻纸过程的助留助滤作用。结果表明，当采用纳米TiO2单元体系，其用量为0．32％（相对绝干浆）时，浆料滤液的相对浊度降为0.26，但其抗剪切能力较差；把纳米TiO2与AmS组成双元体系，用量分别为0．16％、0．4％时，浆料滤液的相对浊度为0.21，同时其抗剪切能力明显提高。在单独或复配使用纳米TiO2时，pH值5．0～9．0范围内有明显的助留助滤作用。通过测量浆料的Zeta电位变化，比较了双元体系不同加入位置时的助留助滤效果，研究了纳米TiO2对DCS的絮聚作用及其作用机理。 The effects of nanosized single TiO2 system and dual-components of nanosizced TiO2 and amphoteric starch on the retention and drainage of 100% DIP furnish for newsprint were studied by dynamic drainage jar （DDJ）. The results showed that when the nanosized TiO2 was used alone, the relative turbidity of the filtrate reached 0.26 over a wide pH range at the dosage of 0.32% based on the dry pulp. When the nanosized TiO2- amphoteric starch （AmS） dual-system was used, with the dosage of 0.16%TiO2 , 0.4%AmS, the relative turbidity of the filtrate reached 0.21. Moreover, the dual retention system was insensitive to shear. In order to reveal the retention mechanism, zeta potential of the systems was measured, retention and drainage effeliencies of the dual components adding in different cocation were compared, and the floculation of DCS with nanosized TiO2 was studied.

关 键 词： 纳米 两性淀粉 脱墨浆 助留助滤

领　　域： [轻工技术与工程]