Ageing of plasticized poly(lactic acid)/poly(3-hydroxybutyrate)/carbon black mulching films during one season of sweet pepper production
| Autor: | Jaroslav Mosnáček, Katarína Mosnáčková, Ivica Janigová, Ivan Chodák, Alena Opálková Šišková, Dagmara Perďochová, Pavol Alexy, Ivana Gálisová, Miroslav Šlosár, Wanda Sikorska, Štefan Chmela, Jozef Kollár |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Polymers and Plastics Organic Chemistry General Physics and Astronomy Humidity 02 engineering and technology Carbon black Dynamic mechanical analysis 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Lactic acid chemistry.chemical_compound chemistry Ultimate tensile strength Pepper Materials Chemistry Food science Elongation 0210 nano-technology Mulch |
| Zdroj: | European Polymer Journal. 114:81-89 |
| ISSN: | 0014-3057 |
| DOI: | 10.1016/j.eurpolymj.2019.02.010 |
| Popis: | Changes in mechanical and thermal properties of biodegradable mulches based on plasticized PLA/PHB filled with 3 wt% of carbon black were investigated during natural ageing in real soil environments after application for one season. The natural ageing process changes were evaluated under three different conditions of the mulching films: (a) buried in the soil, (b) exposed to sunlight, and (c) shadowed by plants. In a parallel study, the film was irradiated by a UV–Vis lamp under laboratory controlled test conditions at constant temperature and humidity. All samples were analyzed using GPC, DSC, DMTA and tensile tests. The plasticized PLA/PHB/CB film buried in soil lost its tensile properties faster than when shadowed by plants or exposed to sunlight. The deterioration of mechanical properties during degradation resulted in significant decreases elongation at break, while Young’s modulus values and tensile stress increased. Assessment of the mulching effect on the harvest of sweet pepper fruits, as well as carotenoids and vitamin C contents, was also performed. The obtained results showed that plasticized PLA/PHB/CB film has the potential for application for one season mulches. |
| Databáze: | OpenAIRE |
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