Synthesis and flocculation property in dye solutions of β-cyclodextrin-acrylic acid-[2-(Acryloyloxy)ethyl] trimethyl ammonium chloride copolymer

In aqueous solution a cationic copolymer, poly (beta-CD-AA-DMC) was synthesized via free radical copolymerization of acrylic acid (AA) esterified beta-CD (beta-CD-AA), and a cationic monomer [2-(Acryloyloxy)ethyl] trimethyl ammonium chloride (DMC). The copolymer's structure, morphology and thermal stability were demonstrated by FT-IR, H-1 NMR, SEM and TGA analysis. The flocculation properties of the copolymer were evaluated by the decolorization solutions of two reactive dyes using a jar test method. The decolorization efficiency is influenced by both the nature of the anionic dyes and the pH of the initial dye solution. Electrostatic adsorption played a more important role in flocculation of dyes than bridging of the polymer. Moreover, the inorganic salt decreased the efficiency of color removal. (C) 2011 Elsevier Ltd. All rights reserved.