Microwave based synthesis of polymethyl methacrylate grafted sodium alginate: its application as flocculant

• Published in: Carbohydrate polymers Vol. 91; no. 2; pp. 686 - 692
• Main Authors: Rani, Priti, Mishra, Sumit, Sen, Gautam
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 16.01.2013; Elsevier
• Subjects: Alginates - chemistry; Applied sciences; Coal; Coal fine suspension; composite polymers; Exact sciences and technology; Flocculant; Flocculation; Fourier transform infrared spectroscopy; Glucuronic Acid - chemistry; Graft co polymer; Hexuronic Acids - chemistry; Microwave assisted synthesis; microwave treatment; Microwaves; Natural polymers; Physicochemistry of polymers; Polymethyl Methacrylate - chemistry; polymethylmethacrylate; scanning electron microscopy; sodium; Sodium alginate; Spectroscopy, Fourier Transform Infrared; Starch and polysaccharides; Viscosity; Water Pollution - prevention & control; Graft co polymer; Coal fine suspension; Sodium alginate; Microwave assisted synthesis; Flocculant; Graft copolymer; Alginates; Experimental study; Methyl methacrylate copolymer; Grafting; Thermal stability; Polyelectrolyte; Flocculation reagent; Flocculation; Morphology; Preparation; Coal; Concentration effect; Microwave irradiation; Oside polymer; Aqueous solution
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2012.08.023

► Polymethyl methacrylate grafted sodium alginate was synthesized by microwave assisted method. ► Higher the percentage grafting of the graft co polymer, higher is its intrinsic viscosity. ► The graft copolymer proved superior flocculant than sodium alginate in coal fine suspension. ► The optimized flocculant dosage as found in coal fine suspension was 0.375ppm. Polymethyl methacrylate grafted sodium alginate (SAG-g-PMMA) was synthesized by microwave assisted method. The grafting of the PMMA chains on the polysaccharide backbone was confirmed through intrinsic viscosity study, FTIR spectroscopy, elemental analysis (C, H, N, O and Na), SEM and TGA study. The intrinsic viscosity of sodium alginate appreciably improved on grafting of PMMA chains, thus resulting grafted product with potential application as superior viscosifier. Further, flocculation efficacy of the graft copolymer was studied in coal fine suspension through jar test procedure, toward possible application as flocculant.