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Abstract
Hybrid ternary nanomaterials based on conjugated polymer polydiphenylamine-2-carboxylic acid (PDPAC) (poly-N-phenylanthranilic acid), Fe3O4 nanoparticles and single-walled carbon nanotubes (SWCNT) were prepared for the first time. Polymer–metal–carbon Fe3O4/SWCNT/PDPAC nanocomposites were synthesized via in situ oxidative polymerization of diphenylamine-2-carboxylic acid (DPAC) by two different ways: in an acidic medium and in the interfacial process in an alkaline medium. In an alkaline medium (pH 11.4), the entire process of Fe3O4/SWCNT/PDPAC-1 synthesis was carried out in one reaction vessel without intermediate stages of product extraction and purification. In an acidic medium (pH 0.3), to prepare the Fe3O4/SWCNT/PDPAC-2 nanocomposites, prefabricated magnetite nanoparticles were deposited on the surface of obtained SWCNT/PDPAC-2. The phase composition of the nanocomposites does not depend on the synthesis reaction medium pH. The influence of the reaction medium pH on the structure, morphology, thermal, magnetic, and electrical properties of the obtained ternary nanocomposites was studied.
Highlights
Modern technology demands the creation of new generation materials with a range of required properties
◦ characterize the crystalline diphenylamine-2 -carboxylic acid (DPAC) oligomers contained in the polymer fraction of of 2θ = 20◦ –43 diffraction (XRD), FTIR spectroscopy, transmission electron microscopy (TEM), and scanning nanomaterials obtained in the acidic medium (Figure 2c), which is confirmed by the Differential scanning calorimetry (DSC) data
Ternary nanomaterials based on polydiphenylamine-2-carboxylic acid (PDPAC), single-walled carbon nanotubes (SWCNT), and magnetite nanoparticles in an acidic medium and in the interfacial process in an alkaline medium were obtained for the first time
Summary
Modern technology demands the creation of new generation materials with a range of required properties. The first way is the in situ oxidative polymerization of aromatic amines in the presence of magnetic nanoparticles immobilized on the surface of carbon nanomaterials [19,20,23,29,39,40]. The second approach provides the in situ oxidative polymerization of aromatic amines in the presence of carbon nanomaterials followed by the deposition of magnetic nanoparticles on the polymer surface [21,22,25,38]. We obtained hybrid nanomaterials based on poly-3-amine-7-methylamine-2-methylphenazine (PAMMP), single-walled carbon nanotubes (SWCNT), and Fe3 O4 nanoparticles via in situ chemical oxidative polymerization of 3-amine-7-methylamine-2-methylphenazine hydrochloride (Neutral Red) in the presence of prefabricated Fe3 O4 /SWCNT nanocomposites [43]. A comparative analysis of the structure, morphology, thermal, magnetic, and electrical properties depending on the synthesis conditions was done
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