Abstract
The present work is devoted to preparation of track membranes by irradiation of polymeric film of isotactic Polypropylene (PP) with accelerated heavy ions of xenon (energy 1.3 MeV/nucl, flow density 10 8 up to 10 10 ion/sm 2 ). The further chemical treatment of irradiated film with KOH (Potassium Hydroxide) solution leads to formation of pores in the polymeric film. It was found that the optimal conditions of track etching of heavy ions in polymer have been studied by the process of pores etching in polymeric film by Atomic Force Microscopy (AFM) method. It has been found out by AFM method, that increase of Xe ions beam density from 10 8 up to 10 10 ion/sm 2 leads to increasing of number, diameter and depth of pores on the surface and from within of polypropylene film. The influence of alkali concentration and temperature on size and depth of pores in the polymeric film has been detected. It has been shown that increasing of concentration of alkali 0.25 M up to 1.5 M and temperature up to 80 ° С lead to decreasing of diameter and depth of pores in polypropylene matrix.
Highlights
Preparation of nanostructure with given properties and formation of functionalized nanomaterials on its basis is one of the most important area of modern materials
Uniform irradiation of all parts of film by heavy ions is carried out by beam reamer in horizontal plane by alternating electric field scanning with frequency 2000 Hz
The velocity of film moving in irradiation process is within 0.1 up to 2 m/sec depending on ion beam intensity and density
Summary
Preparation of nanostructure with given properties and formation of functionalized nanomaterials on its basis is one of the most important area of modern materials. The met stability of compound in nano crystalline state strongly complicates practical application of nanosystem. This is connected with increasing of specific surface contribution and surplus surface energy of physical chemical properties of system. The diminution of the linear size of particles up to nanosize leads to increasing chemical activity and aggregation of nanoparticles. Widely apply the methods of preparation of nanomaterials on the basis of polymeric matrixes. This method prevents the aggregation of nanoparticles as an external influence and as a sequence facilitates the application of these materials
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