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HES-HEMA nanocomposite polymer hydrogels: swelling behavior and characterization

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Abstract

Organophilic sodium montmorillonite (Na-MMT) and Laponite-RD clays were incorporated into photopolymerizable hydroxyethyl starch (HES) modified with 2-hydroxyethyl methacrylate (HEMA). Swelling, mechanical properties and thermal stability of obtained crosslinked nanocomposite polymers were evaluated. A camphorquinone-amine system was used as photoinitiating system in visible light. The interaction between nano-sized filler particles and polymer hydrogel was evaluated by FT-IR spectroscopy and the platelet distribution was investigated by SEM. An increased thermal stability of nanocomposite polymers upon addition of clay was observed by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) indicating interaction between the clay platelets and the polymer chains. The crosslinking density for HES-HEMA/MMT nanocomposite hydrogels as investigated by swelling measurements increases with increasing the organo-clay content. The mechanical properties of virgin hydrogels were improved by the introduction of organo-clay as evidenced by oscillation rheology measurements. Whereas, the increase in crosslink density and storage modulus with clay content for laponite was found to be increasing for all concentrations investigated, for MMT there is an optimum content of ca. 1.5 wt%.

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Author notes

  1. Elbadawy A. Kamoun

    Present address: Polymer Materials Research Department, City for Scientific Research and Technological Applications, Advanced Technology and New Materials Research Institute (ATNMRI), New Borg Al-Arab City, P.O. Box: 21934, Alexandria, Egypt

Authors and Affiliations

  1. Institute for Technical Chemistry, Braunschweig University of Technology, Hans-Sommer St.10, 38106, Braunschweig, Germany

    Elbadawy A. Kamoun & Henning Menzel

Authors
  1. Elbadawy A. Kamoun
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  2. Henning Menzel
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Correspondence to Elbadawy A. Kamoun.

Additional information

E.A. Kamoun gratefully acknowledges Egyptian Ministry of Higher Education and Scientific Research for its financial support and grant.

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Kamoun, E.A., Menzel, H. HES-HEMA nanocomposite polymer hydrogels: swelling behavior and characterization. J Polym Res 19, 9851 (2012). https://doi.org/10.1007/s10965-012-9851-3

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  • DOI: https://doi.org/10.1007/s10965-012-9851-3

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