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        Hybrid Adsorbent Based on Zeolite NaX Modified with Hyperbranched Polyester Poly(N-benzoylthiocarbamate)

        Aleksei Maksimov,Alina Vagapova,Marianna Kutyreva,Gennadiy Kutyrev 한국고분자학회 2022 Macromolecular Research Vol.30 No.1

        A new hybrid adsorbent has been synthesized by covalent linking of activated zeolite with hyperbranched polyester containing 8 terminal N-benzoylthiocarbamate groups. The structure of the polymer ligand was defined by IR, 1H and 13C NMR spectroscopy. The complexing properties of the adsorbent have been studied using the example of complexes with Cu(II) and Co(II) ions. It was proved by IR spectroscopy that N-benzoylthiocarbamate and toluylenecarbamate groups participate in complexation with metal ions. According to electron microscopy and porometry data, the average particle diameter of the adsorbent is 34.56 μm and the mesopore diameter is 4.19 nm. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) have shown that the hybrid adsorbent is thermally stable up to 150℃. The sorption capacities of the adsorbent for Cu(II) and Co(II) ions are 31.92 and 17.7 g/kg. It was shown that the desorption process of metal ions from the complexes occurs in an acidic medium at pH 4 with the regeneration of the original adsorbent.

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