Abstract
A light scattering study was performed on new silver-containing polymer nanocomposites based on water-soluble copolymers of 1-vinyl-1,2,4-triazole having sodium salt of vinylsulphonic acid of various compositions. The formation of nanocomposites was carried out using chemical reduction of silver ions by sodium borohydride in a copolymer- containing aqueous medium. According to the dynamic light scattering data, a decrease in the average sizes of metal-polymer coils in water-salt solutions of nanocomposites is explained in terms of an increase in the content of sulphonate groups in the stabilising polymer matrix. The electrophoretic light scattering with phase analysis of synthesised nanocomposites reveals the zeta potential (ζ) to vary from -35.0 to -75.3 mV with an increased sulphonate unit proportion in the stabilising polymer matrix, indicating an increase in the stability of the colloidal system. The functional composition of the stabilising polymer matrix is established to provide a significant effect on the hydrodynamic dimensions of polymer nanocomposites in an aqueous medium. The authors declare no conflict of interests regarding the publication of this article.
Highlights
Obtaining organic-inorganic nanocomposites based on functional polymers appears to be a promising direction
This paper presents the results of the synthesis and property study of new silver-containing nanocomposites based on copolymers of 1-vinyl1,2,4-triazole (VT) with the sodium salt of vinylsulphonic acid (Na-VSA)
The solution of 0.1 M NaNO3 with 0.1 mg/mL nanocomposite concentration was applied to determine the hydrodynamic particle radius and zeta potential (ζ) of the studied samples by means of the dynamic light scattering (DLS) and electrophoretic light scattering with phase analysis (PALS) methods, respectively, using a Zetasiser Nano-ZS photon particle analyser (Malvern Instruments, UK)
Summary
Obtaining organic-inorganic nanocomposites based on functional polymers appears to be a promising direction. This paper presents the results of the synthesis and property study of new silver-containing nanocomposites based on copolymers of 1-vinyl1,2,4-triazole (VT) with the sodium salt of vinylsulphonic acid (Na-VSA). The initial reagents for the synthesis of nanocomposites consisted of CP grade substances of NH4OH, AgNO3 and NaBH4, as well as copolymers of VT with Na-VSA of various compositions, obtained under conditions of radical initiation of azobisisobutyronitrile (AIBN) at a temperature of 60 °C in DMSO [21]. A solution of 0.5 mmol AgNO3 in 1 mL of 25% NH4OH was added to 1.0 g (10 mmol) of a copolymer dissolved in 15 mL of double-distilled water followed by intensively stirring for 30 min at 20 °C. The synthesis resulted in dark-brown powders of nanocomposites with a yield of 65–70 %
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