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Citation: LIU Zaiman, WEI Yaling. Synthesis and Flocculating Properties of Cationic Polyacrylamide by Aqueous Two-phase Polymerization[J]. Chinese Journal of Applied Chemistry, ;2011, 28(8): 874-878. doi: 10.3724/SP.J.1095.2011.00551 shu

Synthesis and Flocculating Properties of Cationic Polyacrylamide by Aqueous Two-phase Polymerization

LIU Zaiman ^, ,
WEI Yaling

1.
School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070

Corresponding author: LIU Zaiman,
Received Date: 20 September 2010
Available Online: 28 December 2010
Fund Project: 甘肃省自然科学研究基金计划项目(0803RJZA107) (0803RJZA107)

An aqueous two-phase polymerization of acrylamide(AM) with 2-(acryloyloxy) ethyl trimethylammonium chloride(DAC) was carried out using polyethylene glycol(PEG) as dispersant and ammonium persulfate as the initiator.A series of cationic polyacrylamide(CPAM) flocculants was prepared.Effects of the ratio of monomers on the relative molecular mass,monomer conversion and cationic degree were studied.The CPAM was used as flocculating agent for the Yellow River water.The influence of the dosage of CPAM,the pH value of water sample,the stirring speed,the mixing and standing time on the flocculating performance were studied.The results shows that the cationic degree of CPAM increases with the decrease of m(AM)/m(CAD),while the relative molecular mass and conversion slightly decrease.The flocculating efficiency depends on the dosage of CPAM,the pH,stirring speed,and the stirring and standing time.The removal rate of the impurities in the water samples is 92% under the optimum conditions:pH=6,stirring speed 100 r/min,stirring time 15 min,standing time 10 min,CPAM 0.3 mg/L.
- aqueous two-phase polymerization,
- acrylamide,
- cationic monomer,
- flocculating performance
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