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Evaluation of the flocculation phenomena of GCC by polymeric retention systems by Kyong Ho Lee; Sang Hoon Lee; Hye Jung Youn; Hak Lae Lee is a Engineering article available to read on EtoBox.

What is Evaluation of the flocculation phenomena of GCC by polymeric retention systems about?

The influence of several polyelectrolytes and dual as well as microparticle retention systems on the flocculation of GCC fillers was examined using a real time floc size determination unit. Also the effect of shearing conditions on flocculation, deflocculation and reflocculation was examined. It was shown that polymer type, addition rate and shearing conditions had a 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 it remained at the same level when the shearing condition was reduced to lower rate. PEI, however, showed a strong reflocculating effect when the shear was decreased to lower rate even though its flocculating effect was marginal. It was clearly shown that employment of a dual polymeric retention system consisted of cationic PAM and anionic PAM, and a microparticle retention system, composed of cationic PAM and bentonite gave repetitive reflocculating effect after deflocculation. Their effects, however, differed depending upon the cationic polymer used.

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Author

Kyong Ho Lee; Sang Hoon Lee; Hye Jung Youn; Hak Lae Lee

Publisher

Walter de Gruyter GmbH

Published

2014

Language

EN

Field

Engineering (Physical Sciences)