ИСТИНА

Synthesis of iron nanoparticles is carried out in porous matrices of high-density polyethylene and polypropylene. Porous polymer matrices of were obtained via solvent crazing, i.e. via uniaxial stretching in the presence of isopropyl alcohol and lecithine. The value of an effective volume porosity of these matrices is 40 vol.%, the average diameter of pores is 6-8 nm. Introduction of the initial reagents (Fe(II) or Fe(III) salts and sodium boronhydride) in the porous structure is carried out during the pores’ formation and via the counter-current diffusion. The structure and the phase content of the composites produced are studied by Moessbauer spectroscopy as well as X-ray analysis and SEM. The content of iron in the composite is varied from 2 to 40 wt.%. Iron particles in polymers can be uniformly distributed or can be concentrated as a layer with a thickness of 4-6 mcm. Moessbauer spectrum of iron particles obtained inside the polymer matrices is presented. These particles are the complicated aggregates consisting of the initial iron crystallites with a diameter of 10-40 nm, compounds of Fe (III) and the polymer fibrils.