羧甲基壳聚糖/硫酸铝改性滑石粉在高加填纸中的应用  

Application of talc modified with carboxymethyl chitosan/alum in high filler content paper

作　　者：余洋[1] 薛国新[1] 李师珍[1] 娄季攀[1] 

机构地区：[1]浙江理工大学材料与纺织学院,杭州310018

出　　处：《中华纸业》2013年第2期48-52,共5页China Pulp & Paper Industry

摘　　要：采用羧甲基壳聚糖和硫酸铝对造纸填料滑石粉进行表面包覆改性,对改性填料的应用进行了研究。结果表明,在羧甲基壳聚糖用量一定时,沉淀剂硫酸铝的用量对填料的改性过程和改性填料的应用性能有较大影响。当硫酸铝用量为6%时,与未改性加填相比,在灰分提高27.2%的前提下,加填纸张抗张指数仍可提高22.5%,同时加填纸张的白度和不透明度均较好。SEM观察表明,填料形态发生变化,颗粒粒径变大,形成了填料粒子的聚集体;加填纸张的SEM观察表明,滑石粉经改性后,能和纸张纤维形成更有效的吸附,提高填料和纤维之间的结合力,进而改善纸张的强度和纸料留着性能。Carboxymethyl chitosan and alum were used as modifiers in talc surface modification, and the use of modified talc in high filler content paper was investigated. It indicated that the alum dosage is a very critical factor to the modification of talc and the application of modified filler. When 6% alum dosage is applied, the resulting ash content of filled paper is increased by 27.2%, compared with that of unmodified talc, and the tensile strength is also increased by 22.5%, with favorable optical properties kept. The change of morphology was studied to confirm the successful modification. SEM images of filled papers showed a better bonding capacity between modified talc and pulp fibers than that of untreated talc.

关 键 词：羧甲基壳聚糖 硫酸铝 滑石粉 填料改性 高加填纸 

分 类 号：TS727.2[轻工技术与工程—制浆造纸工程]