PREPARATION AND STUDY OF POLYMER NANOPARTICLES

Abstract

Currently, there is an increasing interest in the study of polymers in a nanodisperse state. Since polymer materials, as a rule, are heterogeneous systems with a sufficiently variable surface, a correct assessment of their chemical structure, physical properties and morphology is of great scientific and practical importance. Polymer nanoparticles (PNPs) have been successfully studied for a long time as nanoscale colloidal particles obtained from polymers. Research on HDPE is most intensively conducted in the field of nanomedicine, and the possible application of HDPE in the field of optoelectronics, photonics, gadgets, sensors, sensors, and new nanocomposites is of great interest to researchers. An independent task is to compare the properties of the HDPE with the properties of a bulk polymer, including the features of its supramolecular structure. Previous studies of the supramolecular structure of PDFs have suggested that charge transfer in the polymer during resistive switching occurs along the grids of intergranular boundaries. This paper presents the results of an experimental study of polymer nanoparticles on different substrates by atomic force microscopy. The main metrological parameters of polymer nanoparticles were determined, the results were compared with the available data on the supramolecular structure of polymer films. The possibility of using atomic force microscopy techniques to visualize polymer nanoparticles on dif- ferent substrates has been demonstrated. Using the AFM method with a conductive probe, it was found that in some cases, during the aggregation of nanoparticles on a metal substrate, charge transfer is realized along separate nanometer-sized sections. The conducting channels in the current image have the form of separate points with a height corresponding to the locally flowing current. It was found that the arrangement of the observed channels correlates well with the model of conductivity along the grain boundaries of the supramolecular structure of the polymer. The issues of interpretation of current images of polymer nanoparticles and the physical model of charge transfer in polymer nanostructures are discussed. The work was carried out with the support of the Mirror Labora- tories project of the National Research University Higher School of Economics and an intra-university grant from the Bashkir State Pedagogical University named after M. Akmulla.