The new effective flocculants - Copolymers of N,N-dimethyl-N,N-diallyl-ammonium chloride and N,N-dimethylacrylamide

Radical copolymerization of N,N-dimethyl-N,N-diallylammonium chloride (DMDAAC) with N,Ndimethylacrylamide (DMAA) has been investigated by FT-IR, H-1 NMR spectroscopies, conductometric and turbidimetric titration methods. Flocculation of bentonite suspensions, pig, chicken and cow manure slurries were investigated using the copolymer P(DMDAAC-DMAA) with various compositions and homopolymer P(DMDAAC) by turbidimetric method and the zeta potentials of each samples were tested. The results indicated that copolymer P(DMDAAC-DMAA) (with molar composition 70:30) has the best flocculating ability compared to the other compositions and homopolymer P(DMDAAC). Compared to four suspensions pig manure was found to be more difficult to settle down. (C) 2015 Elsevier B.V. All rights reserved.