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The flocculating properties of chitosan‐ graft ‐polyacrylamide flocculants (I)—effect of the grafting ratio
Author(s) -
Yuan Bo,
Shang Yabo,
Lu YaoBo,
Qin Zuqun,
Jiang Yuxiang,
Chen Aimin,
Qian Xiaozhi,
Wang Guangzhi,
Yang Hu,
Cheng Rongshi
Publication year - 2010
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.32047
Subject(s) - flocculation , polyacrylamide , grafting , chitosan , copolymer , chemical engineering , materials science , polymer chemistry , chemistry , polymer science , polymer , composite material , engineering
A series of chitosan‐ graft ‐polyacrylamide copolymers have been prepared as flocculants for waste water treatment. The results indicated that the grafting ratio was one of the key factors for the flocculating effects. The copolymers with various grafting ratios showed different flocculating properties. To observe every detail of this effect, the specific refractive index increment measurement (SRIIM) method was used to determine the grafting ratio at the beginning of this study. Interestingly, it was found that as the grafting ratio increased, the flocculating effect increased until it reached its maximum point. At that point, it decreased. This result was discussed in terms of the cooperative effects of the charge neutralization and bridging flocculating mechanisms. A structure model of chitosan‐ g ‐polyacrylamide copolymer flocculants has been proposed. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010