Evaluation of the Flocculation Phenomena of GCC by Polymeric Retention Systems
The influence of several polyelectrolytes and microparticle retention systems and shearing rates on the flocculation of GCC fillers was examined using a real time floc size determination unit.It was shown that the molecular weight,charge density and addition rate had the significant influence on flocculation phenomena of GCC.Higher dosage of cationic PAM increased floc size of GCC.The size of GCC flocs formed with cationic PAM decreased significantly when they were exposed to high shear rate and did not show reflocculating tendency when the shearing condition reduced to low rate.On the other hand,PEI gave low flocculating tendency and showed strong reflocculating effect when the shear condition decreased to lower rate.It was verified that microparticle or dual retention system gave strong reflocculating tendency and shear resistance of GCC floes under high turbulent condition.
GCC flocculation polyelectrolyte shear rate deflocculation
HAK LAE LEE HYE JUNG YOUN KYONG HO LEE SANG HOON LEE
Department of Forest Sciences,Program in Environmental Materials Science,CALS,Seoul National University,Seoul,South Korea
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
54-59
2008-05-14（万方平台首次上网日期，不代表论文的发表时间）