| Issue |
E3S Web Conf.
Volume 376, 2023
International Scientific and Practical Conference “Environmental Risks and Safety in Mechanical Engineering” (ERSME-2023)
|
|
|---|---|---|
| Article Number | 01049 | |
| Number of page(s) | 7 | |
| Section | I Environmental Risks and Safety in Mechanical Engineering | |
| DOI | https://doi.org/10.1051/e3sconf/202337601049 | |
| Published online | 31 March 2023 | |
Effect of water and soil microbiota on structure and properties of PLA fiber composites
1 Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Kosygina str., 117997, Moscow, Russia
2 Politecnico di Milano, Piazza Leonardo da Vinci, 32 20133, Milan, Italy
3 Plekhanov Russian University of Economics, Stremyanniy, Moscow, Russia
4 Federal Scientific Agroengineering Center VIM, 1st Institutskiy proezd, 117997, Moscow, Russia
* Corresponding author: terj@rambler.ru
Nonwoven fibers from biodegradable polymers such as polylactide and natural rubber were obtained by electrospinning. The fiber morphology was studied by optical microscopy. Thermal properties were studied by differential scanning calorimetry. It is shown that after the action of water for 180 days, the glass transition temperature is not observed on DSC thermograms. The degree of crystallinity of all samples increases by 9- 12% depending on the composition. After exposure to soil, the glass transition temperature changes little for pure PLA and a sample containing 5 wt.% of natural rubber and decreases by 2-3 оC in samples with a rubber content of 10 and 15 wt.%. The melting point of PLA fiber increases by 2 оC during degradation in the soil, and in fibrous composites it decreases by 1.5 оC. Changes in the values of the degree of crystallinity have a similar tendency. Thus, under the same temperature and time conditions, water has a stronger effect compared to soil on the structure of nonwoven fibrous materials PLA/NR.
Key words: biodegradable polymers / nonwoven fibers / polylactide / natural rubber / soil microbiota
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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