Novel stimuli responsive gellan gum-graft-poly(DMAEMA) hydrogel as adsorbent for anionic dye

International Journal of Biological Macromolecules
J S Karthika, B Vishalakshi

Abstract

In this study, gellan gum-grafted-poly((2-dimethylamino) ethyl methacrylate) (GG-g-poly(DMAEMA)) hydrogel was made by free radical polymerization in aqueous media employing microwave irradiation technique. Ammonium persulfate (APS)/N,N,N',N'-tetramethylethylenediamine (TMEDA) were used as initiator-accelerator pair. N,N'-methylenebisacrylamide (MBA) has been used as crosslinker. The gel was characterized by FTIR, XRD, TGA, DSC and SEM techniques. The characteristic peaks at 1724, 2630, 1147, 1650 and 1535cm(-1) in the IR spectrum confirms grafting and gel formation. The TGA data reveals that synthesized gels were thermally more stable than gellan gum. The XRD studies confirm the crystalline nature of the synthesized material. Swelling behaviour of the hydrogel under different temperatures and pH conditions was investigated. The results indicated drastic changes in swelling around pH 7.0 and 50°C. The gels were evaluated as an adsorbent to remove an anionic dye, methyl orange (MO), from aqueous solution. The pH conditions for maximum adsorption were optimized, the adsorption data is observed to fit best to the Freundlich isotherm model and the maximum adsorption capacity was found to be 25.8mgg(-1). The kinetic analysis revealed...Continue Reading

References

May 3, 2005·Critical Reviews in Therapeutic Drug Carrier Systems·N KashyapM N V Ravi Kumar

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Citations

Oct 30, 2016·International Journal of Biological Macromolecules·Noor TahirSaima Noreen
May 15, 2020·Environmental Science and Pollution Research International·Seyedeh-Arefeh Safavi-MirmahallehHossein Roghani-Mamaqani
Dec 15, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Thangavelu MuthukumarGilson Khang
Apr 20, 2021·ACS Applied Materials & Interfaces·Jae-Hyeok ChoiDongyoung Lee
Apr 27, 2021·Small·Ehsan Nazarzadeh ZareMika Sillanpää
Aug 21, 2021·ACS Biomaterials Science & Engineering·Pei Lin CheeXian Jun Loh
Sep 2, 2021·ACS Applied Materials & Interfaces·Xiaojie LiuYi Zheng

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