| Autor: |
Tertyshnaya YV; Department of Biological and Chemical Physics of Polymers, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Str., 119334 Moscow, Russia.; Perspective Composite Materials and Technologies Laboratory, Plekhanov Russian University of Economics, 36 Stremyanniy, 117997 Moscow, Russia.; Federal Scientific Agroengineering Center VIM, 1st Institutskiy Proezd, 5, 109428 Moscow, Russia., Karpova SG; Department of Biological and Chemical Physics of Polymers, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Str., 119334 Moscow, Russia., Podzorova MV; Department of Biological and Chemical Physics of Polymers, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Str., 119334 Moscow, Russia.; Perspective Composite Materials and Technologies Laboratory, Plekhanov Russian University of Economics, 36 Stremyanniy, 117997 Moscow, Russia.; Federal Scientific Agroengineering Center VIM, 1st Institutskiy Proezd, 5, 109428 Moscow, Russia., Khvatov AV; Department of Biological and Chemical Physics of Polymers, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Str., 119334 Moscow, Russia., Moskovskiy MN; Federal Scientific Agroengineering Center VIM, 1st Institutskiy Proezd, 5, 109428 Moscow, Russia. |
| Abstrakt: |
In this work, PLA/NR electrospun fibers were used as substrates for growing basil. Thermal characteristics of initial samples and after 60 and 220 days of degradation were determined using differential scanning calorimetry. In the process of disintegration, the melting and glass transition temperatures in PLA/NR composites decreased, and in PLA fibers these values increased slightly. TGA analysis in an argon environment confirmed the effect of NR on the thermal degradation of PLA/NR fibers. After exposure to the soil for 220 days, the beginning of degradation shifted to the low-temperature region. The dynamic characteristics of the fibers were determined by the EPR method. A decrease in the correlation time of the probe-radical in comparison with the initial samples was shown. FTIR spectroscopy was used to analyze the chemical structure before and after degradation in soil. In PLA/NR fibrous substrates, there was a decrease in the intensity of the bands corresponding to the PLA matrix and the appearance of N-H C-N groups due to biodegradation by soil microorganisms. |
