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Synthesis of high-performance superabsorbent glycerol acrylate-cross-linked poly (acrylic acid)

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Abstract

Glycerol acrylate (GA) is synthesised by an acryloylation reaction with acryloyl chloride. An ester was used as a cross-linking agent at varying proportions in the synthesis of poly acrylic acid (PAA). The amount of cross-linking density in the product (GA-PAA) and degree of neutralisation determine the absorbency of the polymer samples. A sample of GA-PAA containing 0.8 % GA was discovered to absorb 395 and 66 g/g of water and saline solution, respectively. Different solvent uptakes were tested with the sample showing varying capacity for different solvents. The temperature of the reaction was maintained at 60 °C and a reaction time of 2½ h. FTIR, TGA, SEM and XRD analyses were used to characterise the products.

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Acknowledgments

The authors are grateful to the North-West University, Sasol Technology and the South African National Research Foundation (NRF) for financial support. The authors are also grateful to Dr. Louwrens Tiedt of the Laboratory for Electron Microscopy and Belinda Venter, North-West University, for the SEM and XRD analyses respectively.

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Authors and Affiliations

  1. Research Focus Area for Chemical Resource Beneficiation, Catalysis and Synthesis Research Group, North-West University, Private Bag X6001, Potchefstroom, 2520, South Africa

    Aliyu D. Mohammed, Desmond A. Young & Hermanus C. M. Vosloo

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  1. Aliyu D. Mohammed
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  2. Desmond A. Young
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  3. Hermanus C. M. Vosloo
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Correspondence to Desmond A. Young.

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Mohammed, A.D., Young, D.A. & Vosloo, H.C.M. Synthesis of high-performance superabsorbent glycerol acrylate-cross-linked poly (acrylic acid). Res Chem Intermed 43, 2187–2200 (2017). https://doi.org/10.1007/s11164-016-2754-x

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  • DOI: https://doi.org/10.1007/s11164-016-2754-x

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