阳离子淀粉用量对PCC絮聚体稳定性的影响  

Effect of the dosage of cationic starch on the stability of PCC flocs

作　　者：李涛 张美云[1] 郗伟 LI Tao;ZHANG Mei-yun;XI Wei(College of Bioresources Chemical and Materials Engineering,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science&Technology,Xi′an 710021,China;Chemical Engineering Department,Shaanxi Institute of Technology,Xi′an 710300,China)

机构地区：[1]陕西科技大学轻工科学与工程学院,轻化工程国家级实验教学示范中心,陕西西安710021 [2]陕西国防工业职业技术学院化学工程学院,陕西西安710300

出　　处：《陕西科技大学学报》2018年第2期6-9,共4页Journal of Shaanxi University of Science & Technology

基　　金：陕西省教育厅科研计划项目(17JK0067);陕西国防工业职业技术学院科研基金项目(GFY17-20)

摘　　要：采用阳离子淀粉(CS)与沉淀碳酸钙(PCC)进行预絮聚,对不同CS用量下絮聚体的形貌进行了观察比较.预絮聚后的絮聚体在湿部的尺寸及稳定性直接影响到成纸后填料聚集体在纤维网络中分布进而影响到纸张性能.研究了不同CS用量下PCC絮聚体在不同剪切模式下的抗剪切与再絮聚行为,并对其絮聚机理进行了分析.研究表明,随着CS用量增大,CS大分子桥连对絮聚体稳定性有所改善,但经超声波处理后,以桥连机理形成的絮聚体再絮聚能力较弱.Precipitated calcium carbonate(PCC)werepreflocculated by cationic starch(CS).The morphology of flocs at different CS dosages was observed and compared.The size and stability of flocs in the wet end directly affect the distribution of the filler aggregates in the fiber network after paper forming,thereby affecting the properties of the paper.The shear resistance and reflocculation behavior of PCC flocs under different shear modes at different CS dosages was studied,and the mechanism of flocculation was also analyzed.The results showed that the stability of flocs was improved with the increase of CS dosage,however,after ultrasonic treatment,the reflocculation ability of flocs formed by the bridging mechanism is weaker.

关 键 词：阳离子淀粉 PCC 预絮聚 剪切 

分 类 号：TS753[轻工技术与工程—制浆造纸工程]