STUDY ON THE RETENTION MECHANISMS OF HIGH MOLECULAR WEIGHT CATIONIC POLYACRYLAMIDE

1INTRODUCTIONWith the development of paper industry, more and more paper chemicals are applied into the wet-end of papermaking. Understanding their different functional mechanisms could be of benefit to their applications. Since the main compositions of paper furnish, that is, fibers, fines and fillers, take negative charges and have large surface area, the functional mechanisms between the above-mentioned particles and the aids of retention and drainage mainly include "patch mechanism" an…

STUDY ON THE RETENTION MECHANISMS OF HIGH MOLECULAR WEIGHT CATIONIC POLYACRYLAMIDE

Cationic polyacrylamide (CPAM), used as a retention and drainage aid in paper industry, has received much attention. As the white water system becomes more closed and the anionic trash in the furnish is accumulated, the anionic trash catcher (ATC) is often applied to neutralize the anionic trash. In this paper, we applied colloid titration and Zeta potential analysis to measure the charge and Zeta potential of paper furnish under the conditions of only adding CPAM and adding both CPAM and polyaluminum chloride (PAC). The underlying mechanism was studied.