Influence of Processing Methods on the Mechanical Behavior of Poly‐3‐hydroxybutyrate Nonwoven Scaffolds

Abstract

The theoretical prediction of the mechanical behavior of fibrous materials for medicine in different environments is of great scientific interest. The deformation mechanisms under loading of biopolymer electrospun fibrous materials differ significantly in dependence on the phase state of the medium, namely, liquid state, gaseous state, or at their interface. In this paper, the influence of various mediums on the mechanical behavior of fibrous materials based on poly-3-hydroxybutyrate under tension is examined. The oxidative stress (ozone treatment) and the incorporation of low concentrations of modifying additives (complexes of tetraphenyl-porphyrin with Zn) are proposed as the most effective methods of directed control of stress-related characteristics without a negative effect on the functional properties of medical materials.

Development of Nonwoven Fibrous Materials Based on Poly-3-Hydroxybutyrate with a High Content of α-Tricalcium Phosphate

“…The stress-strain curves (Figure 9 show the breaks of individual, less durable fibers, which do not lead to the destruct the entire system. It should be noted that in the case of 20%, the shape of the curve ch significantly, where we see more abrupt discontinuities, which indicate that the nu of fibers loaded with large α-TCP particles is significantly greater than in the case of The process of deformation of a nonwoven material based on PHB represents destruction at the moment when the most durable fibers passing through the entire system do not withstand the load and are destroyed [58]. The stress-strain curves (Figure 9) also show the breaks of individual, less durable fibers, which do not lead to the destruction of the entire system.…”

“…Tensile stress-strain curves of PHB-α-TCP are shown on Figure 9, and tensile strength of PHB-α-TCP is given on Figure 10. It must be noted that PHB-based fibrous materials are usually fragile and have low mechanical properties [57,58]. The addition of α-TCP had a significant effect on the strength of materials, reducing it by almost by a half (Figure 10).…”

“…The process of deformation of a nonwoven material based on PHB represen struction at the moment when the most durable fibers passing through the entire sy do not withstand the load and are destroyed [58]. The stress-strain curves (Figure 9 show the breaks of individual, less durable fibers, which do not lead to the destruct the entire system.…”

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

“…The maximum strength of thin films based on PHB was 12.34 N. The strength of electrospun samples with the same thickness was decreased by a factor of nearly six. The main reason for this decrease is the fragility of individual fibers, which are easily torn, concentrating the residual stress of the undocrystallized areas when plasticizing additives are removed or in the case of post-treatment [37]. However, the decrease in strength is compensated for by an increase in maximum elongation.…”