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Novel, rosin‐based, hydrophobically modified cationic polyacrylamide for kaolin suspension flocculation
Author(s) -
Zhang Haibo,
Jiang Jianxin,
Shang Shibin,
Song Zhanqian,
Song Jie
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46637
Subject(s) - cationic polymerization , polyacrylamide , flocculation , ammonium chloride , monomer , molar mass , aqueous solution , viscometer , polymer chemistry , copolymer , ammonium bromide , chemistry , ammonium persulfate , nuclear chemistry , materials science , chemical engineering , polymer , viscosity , organic chemistry , pulmonary surfactant , composite material , biochemistry , engineering
A novel, hydrophobically modified cationic polyacrylamide (HMPAM) was synthesized via the copolymerization of acrylamide, diallyl dimethyl ammonium chloride (DMDAAC), and diallylmethyl dehydroabietic acid propyl ester ammonium bromide. Optimum conditions for preparing HMPAM were such that the amount of initiator was 0.075 wt % of the total monomer mass, the monomer concentration was 20 wt %, and the amount of DMDAAC was 18 mol % of the total monomer molar mass. HMPAM was characterized with an UV–visible spectrometer, 1 H‐NMR, Ubbelohde viscometer, rotational viscometer, and rotational rheometer. HMPAM solutions exhibited strong hydrophobic associations, and the critical association concentration of the HMPAM aqueous solution was about 0.7 wt %; the HMPAM solutions also showed salt thickening and shear resistance. The surface morphologies of the freeze‐dried HMPAM samples (1 wt %) were also observed via scanning electron microscopy. Compared with unmodified cationic polyacrylamide, Synthesis of HMPAM‐0.5 exhibited a stronger flocculation capacity, and the optimal transmittance of the supernatants was above 95%. HMPAM‐0.5 showed significant flocculation performances for 3–4 and 3–5 wt % kaolin suspensions at 40 and 50 mg/L, respectively. Moreover, the flocculation performance was enhanced with the addition of NaCl and CaCl 2 . © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46637.