Abstract
This paper reports the results of intermatrix synthesis (IMS) of silver metal nanoparticles (Ag-MNPs) in Purolite C100E sulfonic ion exchange polymer of the gel-type structure. It has been shown that the surface morphology of the initial MNP-free polymer is absolutely smooth, but it dramatically changes after the kinetic loading of Ag on the polymer and then IMS of Ag-MNPs. These morphological changes can be explained by the interaction of Ag-NPs with the polymer chains, leading to a sort of additional cross-linking of the polymer. As a result, the modification of the gel-type matrix with Ag-MNPs leads to the increase of the matrix cross-linking, which results in the increase of its surface area and the appearance of nanoporosity in the polymer gel. Ag-MNPs are located near the polymer surface and do not form any visible agglomerations. All these features of the nanocomposites obtained are important for their practical applications in catalysis, sensor applications, and bactericide water treatment.
Highlights
Ion exchange materials find numerous large-scale industrial applications in various fields, such as water treatment processes, catalysis, and some others
The modification of ion exchangers with functional metal nanoparticles (FMNPs) can be carried out by using the intermatrix synthesis (IMS) technique coupled with the Donnan exclusion effect
We report the results obtained by studying the properties of the polymer component of FMNPs composed of Ag-metal nanoparticles (MNPs) and Purolite C100E resin of the gel type
Summary
Ion exchange materials find numerous large-scale industrial applications in various fields, such as water treatment processes, catalysis, and some others. The modification of ion exchangers with FMNPs can be carried out by using the intermatrix synthesis (IMS) technique coupled with the Donnan exclusion effect. Such combination allows for production of polymermetal nanocomposites with the distribution of FMNPs near the surface of the polymer on what appears to be the most favorable in their practical applications. This technique has been used to modify the polymers with cation exchange functionality with FMNPs by using the procedure described by the following sequential stages: (1) immobilization (sorption) of metal or metal complex. In all publications dedicated to the synthesis and application of Ag-MNPs in various supporting polymers, the main attention was paid to the properties of MNPs, i.e., to the properties of just one component of PMNCs, which are determined by PMNC components: the polymer matrix, the NPs, as well as the interaction between them
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