Abstract
The graft copolymer of locust bean gum (LBG) and acrylamide has been synthesized by microwave assisted method using potassium persulphate (KPS) as an initiator in aqueous medium. Different reaction parameters such as time, initiator concentration, monomer concentration, polymer concentration, and microwave power were studied to get maximum graft copolymer. The grafted copolymer was characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and differential scanning calorimetry (DSC). The graft copolymer exhibited pH switching on-off behavior depending on the pH of the external medium. Flocculation capacity of LBG and LBG-graft-polyacrylamide for both coking and non-coking coals has been studied. Results indicated that the graft copolymer exhibited good flocculation properties compared to native polymer. The graft copolymer was non-toxic in the acute toxicity study, since the acute single dose did not cause any toxic signs, or symptoms. All mice treated with the graft copolymer survived beyond the 14 days of observation period.
Highlights
Locust bean gum is a white to yellowish powder chains[9]
Once the free radical sites are formed consisting of β-(1,4)-D-mannose units and every fourth on the polymer backbone, the monomer can get added up mannose units is substituted with a small side chain consisting through the chain propagation step, leading to the formation of a 1,6 linked α-galactose sugar[2]
Polyacrylamide grafted locust bean gum (LBG) was synthesized by microwave assisted method. 0.125g to 0.5g of LBG was dissolved in 25 ml distilled water. 0.5g to 3g of acrylamide was dissolved in 5 ml of water and added to the above solution. 1mg to 400 mg of KPS was dissolved in 5 ml of water and added to above dispersion
Summary
Locust bean gum is a white to yellowish powder chains[9]. The process of graft copolymer synthesis starts obtained by crushing the endosperm of the seeds of the with a performed polymer (polysaccharide in this case). The physico-chemical number of characteristic advantages such as shorter radiation times, higher yields, limited generation of byproducts and the relatively simple scale-up without unfavorable effects, properties of galactomannan are strongly influenced by the galactose content and the distribution of the galactose units along the main chain It is widely used in the food industry as stabilizer and viscosity modifier, as well as in the textile industry by its film-forming properties[4]. LBG has wide of microwave radiation in the absence of any free radical range of uses and applications, it suffers from certain drawback initiator (microwave initiated grafting)[12] Though both like uncontrolled hydration, microbial contamination and the aforementioned grafting methods lead to significant drop in viscosity
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