Obtaining modified fibers of polymethylmethacrylateby method of electrospinning

Abstract

This paper presented results on the preparation and study of the fibers of polymethylmethacrylate (PMMA) modified additives in the form of various metal salts (СоСl₂, SnCl₂, La(NO₃)₃), obtained by method of electrospinning. The fibers were studied by scanning electron microscopy for establishing the structural parameters and morphology, also shows element analysis of fibers with various modifying additives. It was found that the diameter of the obtained fibers in the range from 600 nm to 9 microns. Demonstrated the possibility of combining the processes electrospinning and electrospray to produce core-shell structures. Similar structures have been obtained for the system PMMA - СоСl₂ in which the shell – PMMA, core - the particles salt of СоСl₂. Size of the generated core - shell structures were in the range of 25 nm to 3.5 microns. When used as a modifying additive salt of lanthanum nitrate (La(NO₃)₃), it was found that lanthanum, included into salt, recovered to the metal, which is confirmed by elemental analysis of the obtained fibers. These results create the preconditions for the possibility of obtaining polymer fibers containing nanoparticles of metallic lanthanum and to obtain on their basis carbon - metal fibers during further processing. Experiments with the use of metal salts illustrates the prospect of the method eleсtrospinning for encapsulating nanoparticles of various compounds (salts, oxides, etc.) within the polymer fibers. In addition, consider the influence of experimental conditions on the structure and morphology of the fibers. Regarded the influence of the rheological properties of the fluid, the formation of aggregates of macromolecules in solution of polymer and viscosity on the formation of fiber structure, different types of surface deformation and internal inclusions.