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Enhancement of the retention performance of the poly(ethylene oxide) — tannic acid system by poly (diallyldimethyl ammonium chloride)
Author(s) -
Khoultchaev K. H.,
Pang P.,
Kerekes R. J.,
Englezos P.
Publication year - 1998
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450760214
Subject(s) - tannic acid , ammonium chloride , chemistry , ethylene oxide , ammonium , chloride , inorganic chemistry , oxide , ethylene , zeta potential , polymer chemistry , catalysis , materials science , organic chemistry , polymer , nanotechnology , copolymer , nanoparticle
The retention performance of the poly(ethylene oxide) (PEO) and tannic acid (TA) dual system was studied in the presence of poly(diallyldimethyl ammonium chloride) (PDADMAC). The zeta potential, and size of the association complex between PEO and TA in the presence of PDADMAC as well as the infrared spectra of TA and the PEO‐TA system were also studied. It was shown that hydrogen bonds are formed between the phenolic and acidic groups of TA and the oxygen atoms of the PEO macromolecules. Moreover, it was found that the presence of small quantities of PDADMAC enhances the fibre fines and clay first pass retention. The maximum effect was observed with an amount of added PDADMAC equal to 20% of the amount of added PEO. Further addition of PDADMAC was found to decrease the retention probably because it re‐charges the surface to positive. When clay was replaced by ground calcium carbonate no retention improvement was detected. This is most likely due to the presence of calcium ions.