Assessing the Biodegradability of PHB-Based Materials with Different Surface Areas: A Comparative Study on Soil Exposure of Films and Electrospun Materials

Due to the current environmental situation, biopolymers are replacing the usual synthetic polymers, and special attention is being paid to poly-3-hydroxybutyrate (PHB), which is a biodegradable polymer of natural origin. In this paper, the rate of biodegradation of films and fibers based on PHB was compared. The influence of exposure to soil on the structure and properties of materials was evaluated using methods of mechanical analysis, the DSC method and FTIR spectroscopy. The results showed rapid decomposition of the fibrous material and also showed how the surface of the material affects the rate of biodegradation and the mechanical properties of the material. It was found that maximum strength decreased by 91% in the fibrous material and by 49% in the film. Additionally, the DSC method showed that the crystallinity of the fiber after exposure to the soil decreased. It was established that the rate of degradation is influenced by different factors, including the surface area of the material and its susceptibility to soil microorganisms. The results obtained are of great importance for planning the structure of features in the manufacture of biopolymer consumer products in areas such as medicine, packaging, filters, protective layers and coatings, etc. Therefore, an understanding of the biodegradation mechanisms of PHB could lead to the development of effective medical devices, packaging materials and different objects with a short working lifespan.

Automated summary

As a response to the current environmental situation, biopolymers, especially poly-3-hydroxybutyrate (PHB), have gained attention as biodegradable polymer alternatives to synthetic polymers. This study compared the biodegradation rate of films and fibers based on PHB, evaluating the influence of soil exposure on their structure and properties using mechanical analysis, DSC method, and FTIR spectroscopy. Results showed rapid decomposition of fibrous material and indicated the impact of material surface on the biodegradation rate and mechanical properties. Understanding the biodegradation mechanisms of PHB is of great importance for the development of medical devices, packaging materials, and short-lived consumer products.