Journal
CARBOHYDRATE POLYMERS
Volume 93, Issue 2, Pages 506-511Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.12.049
Keywords
Flocculant; Salep; Graft polymer; Fiber cement
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A new cationic flocculant was synthesized by graft copolymerization of acrylamide (AM) and 3-(methacryloylamino)propyl]trimethylammonium chloride (MAPTAC) onto salep using free radical polymerization initiated by ammonium persulfate (APS) to produce cationic salep [S-g-P(AM-co-MAPTAC)]. Reaction parameters (monomers/salep ratio, concentration of reactants, MAPTAC/AM ratio, and APS) were optimized using a full factorial experimental design to obtain the highest settling rate for cement suspensions. The best performing product was characterized by gel permeation chromatography (GPC), FTIR, H-1 NMR spectroscopy, and thermogravimetric analysis (TGA). The resulted cationic flocculant may be introduced as a promising candidate for the green production of asbestos-free fiber cement products by Hatschek process. (c) 2012 Elsevier Ltd. All rights reserved.
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