Interactions among Cationic Polymers and Dissolved and Colloidal Substances of Aspen CTMP
(0) With the development of mechanical pulping technology,high-yield pulp can be produced at lower cost.However,more dissolved and colloidal substances(DCS)tend to be released during the production of high-yield pulp.The DCS may interfere with wet-end paper chemicals,especially the cationic additives.In this work,the interactions between cationic polymers(PDADMAC and CPAM)and DCS of aspen CTMP were studied.Results showed that less amount of PDADMAC and higher amount of CPAM were needed to destabilize DCS completely.The mechanism of PDADMAC was mainly charge mosaic for its high cationic charge density and the mechanism of CPAM was mainly bridging fiocculation for its low cationic charge density and its molecular conformation.The presence of fibers indeed promoted the destabilization of DCS and the removal of COD.The increase of fiber consistency and DCS concentration was favorable for the destabilization and the removal of DCS by cationic polymers.This was due to the change of concentration leading to the change of time between two consecutive particle collisions.
chemithermomechanical pulp (CTMP) dissolved and colloidal substances (DCS) flocculation turbidity chemical oxygen demand(COD) cationic polymers
QINGXIAN MIAO QINGXI HOU MENGHUA QIN
Tianjin Key Laboratory of Pulp & Paper,Tianjin University of Science & Technology,Tianjin 300457,Chi Key Lab of Paper Science and Technology of Ministry of Education,Shandong Institute of Light Industr
国际会议
第二届国际造纸与环境学术会议(The Second International Papermaking & Environment Conference)
天津
英文
689-693
2008-05-14（万方平台首次上网日期，不代表论文的发表时间）