Microbial destruction of guanidine containing polymers

Keywords

guanidine-containing polymers, biodegradation, hydrocarbon-oxidizing bacte­ria, enzymes, IR microscopy, thermogravimetry, tensile strength, relative elongation.

Cite as

Kopteva Zh. P., Vortman M. Ya., Iutynska G. O., Kopteva G. E., Abdulina D. R., Lemeshko V. M., Terebilenko A. V., Pylypenko A. M., and Shevchenko V. V. Microbial destruction of guanidine containing polymers. Physicochemical Mechanics of Materials. 2023. 59(4), 108-116.

https://doi.org/10.15407/pcmm2023.04.108

Abstract

The fracture of guanidine-containing polymers and the chemical and physicomechanical properties of the synthesized materials under the influence of hydrocarbon-oxidizing bacteria (HOB) were studied. Scanning electron microscopy revealed the formation of a HOB biofilm on the surface of the studied materials. Such polymers inhibited catalase and lipolytic activity in 1.3–3 times compared to the environment under control. According to the obtained data, the fracture of guanidinium polymers was insignificant (4.4–6.53%). The physicomechanical properties of the materials – tensile strength and relative elongation practically did not change during 180 days of the experiment. These results are consistent with the results of IR microscopy. The method of thermogravimetric analysis showed that for the two studied materials the initial temperature of decomposition did not decrease and their properties after exposure to the HOB did not change. It is can be assumed that under the influence of bacteria on the surfaces of these polymers, minor surface biodegradation may have occurred. Therefore, the tested polyurethane-based material is promising for protecting various structures against biodamage.

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