[Modification of the surface of bioresorbed polymer matrices by laser treatment]

The effect of laser irradiation on the properties of the surface of film matrices obtained from the bioresorbed polymer polyhydroxybuturate has been studied. To determine the spectral region of the polymer optimal for the effective action of radiation on electron molecular bonds, theoretical investigations have been performed, which have shown that, for modifying the surface of matrices obtained from polyhydroxybuturate, it is expedient to use a vacuum laser at a wavelength of 160 nm. Using the laser regime of irradiation of matrices at a radiation power from 3.0 to 30 Wt, a series of films with modified surface, from roughnesses to perforations, have been obtained. The microstructure and properties of the film surface depending on the mode of irradiation have been examined, and conditions have been found under which the contact marginal angles of moistening of films with water can be decreased to 50 degrees (compared with 76-80 degrees in starting products). Thus, the conditions of laser treatment of polyhydroxybuturate matrices have been theoretically substantiated and experimentally realized that provide a beneficial effect on the properties of the surface without destroying the structure of the material.