Metal–organic frameworks (MOFs) are a class of materials that are increasingly used for the detection and separation of gases. This article presents the influence of gamma radiation on the dielectric properties of a LDPE/ZIF-8 composite that can be used for the production of gas sensors and massive gas absorbers. A low-density polyethylene (LDPE)–microsized zeolitic imidazolate framework-8 (ZIF-8) composite, obtained by melt mixing (95/5 weight ratio), was gamma-irradiated at room temperature to different absorbed doses up to 300 kGy. Infrared spectroscopy and optical microscopy confirmed the degradation of the ZIF-8 due to the gamma irradiation. The AC conductivity (admittance) of the samples was studied in the frequency range of 24 Hz − 120 kHz and a temperature range 200–350 K. The composite showed larger admittance components relative to the admittance components of pure LDPE; the conductance of the samples increased almost linearly with increasing irradiation dose. On the other hand, the change in dielectric permittivity of the LDPE and the composite due to irradiation was weak and showed nonlinear behavior with increasing radiation dose.

In order to remove harmful microorganisms, textile materials are subjected to various types of antimicrobial treatments. Skin infections represent a permanent diagnostic and therapeutic challenge, and can be caused by bacteria, viruses, fungi and parasites. In this paper, the impact of printing insoles with alginate paste, modified bentonites and Picea omorika plant extract on their antimicrobial, dielectric and sorption properties was investigated. It was found that the printed insoles show a certain antimicrobial effect on the bacteria Staphylococcus aureus and Escherichia coli and the yeast Candida albicans. The obtained values of specific conductivity are in agreement with the tested parameter of the sorption properties of the insoles.