Thermo-Oxidative Destruction and Biodegradation of Nanomaterials from Composites of Poly(3-hydroxybutyrate) and Chitosan

Olkhov, A. A.; Mastalygina, E. E.; Ovchinnikov, V. P.; Монахова, Т. В.; Vetcher, Alexandre A.; Iordanskii, A. L.

doi:10.3390/polym13203528

Cited by 4 publications

(5 citation statements)

References 52 publications

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“…During the curing of the jet and the subsequent transition to the glassy state, the PHB and PLA molecules incompletely lose their orientation, and most of the macromolecules retain their still-forced elongated state. The phenomenon of macromolecule orientation when exposed to ozone was previously discovered in [28]. In this case, in two-phase polymeric systems, there is a forced separation of polymeric components with the formation of an additional free volume.…”

Section: Resultsmentioning

confidence: 93%

“…The study of biological degradation was carried out according to GOST 32,427 (method B): test for biodegradation under the action of soil microorganisms on the release of carbon dioxide (Sturm test). A detailed description of the methodology is given in the paper [28]. To obtain the inoculum, soil was prepared according to Russian Standard GOST 9.060.…”

Section: Biological Degradation Analysis (Sturm Test)mentioning

confidence: 99%

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Biological and Oxidative Degradation of Ultrathin-Fibrous Nonwovens Based on Poly(lactic Acid)/Poly(3-Hydroxybutyrate) Blends

Olkhov

Mastalygina

Ovchinnikov

et al. 2023

IJMS

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Developing biodegradable materials based on polymer blends with a programmable self-destruction period in the environmental conditions of living systems is a promising direction in polymer chemistry. In this work, novel non-woven fibrous materials obtained by electrospinning based on the blends of poly(lactic acid) (PLA) and poly(3-hydroxybutyrate) (PHB) were developed. The kinetics of biodegradation was studied in the aquatic environment of the inoculum of soil microorganisms. Oxidative degradation was studied under the ozone gaseous medium. The changes in chemical composition and structure of the materials were studied by optical microscopy, DSC, TGA, and FTIR-spectroscopy. The disappearance of the structural bands of PHB in the IR-spectra of the blends and a significant decrease in the enthalpy of melting after 90 days of exposure in the inoculum indicated the biodegradation of PHB while PLA remained stable. It was shown that the rate of ozonation was higher for PLA and the blends with a high content of PLA. The lower density of the amorphous regions of the blends determined an increased rate of their oxidation by ozone compared to homopolymers. The optimal composition in terms of degradation kinetics is a fibrous material based on the blend of 30PLA/70PHB that can be used as an effective ecosorbent, for biopackaging, and as a highly porous covering material for agricultural purposes.

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Section: Resultsmentioning

confidence: 93%

Section: Biological Degradation Analysis (Sturm Test)mentioning

confidence: 99%

Biological and Oxidative Degradation of Ultrathin-Fibrous Nonwovens Based on Poly(lactic Acid)/Poly(3-Hydroxybutyrate) Blends

Olkhov

Mastalygina

Ovchinnikov

et al. 2023

IJMS

Self Cite

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“…Polymer mixtures have different morphologies depending on their composition. It also affects the biodegradation process [ 71 ]. Additionally, different biodegradable polymers decompose at different rates [ 72 , 73 ].…”

Section: Methodsmentioning

confidence: 99%

Physical, Mechanical, and Structural Properties of the Polylactide and Polybutylene Adipate Terephthalate (PBAT)-Based Biodegradable Polymer during Compost Storage

Myalenko

Fedotova

2023

Polymers

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Today, packaging is an integral part of any food product, preserving its quality and safety. The use of biodegradable packaging as an alternative to conventional polymers reduces the consumption of synthetic polymers and their negative impacts on the environment. The purpose of this study was to analyze the properties of a biodegradable compound based on polylactide (PLA) and polybutylene adipate terephthalate (PBAT). Test samples were made by blown extrusion. The structural, physical, and mechanical properties of the PLA/PBAT material were studied. The property variations during compost storage in the lab were monitored for 365 days. The physical and mechanical properties were measured in accordance with the GOST 14236-2017 (ISO 527-2:2012) standard. We measured the tensile strength and elongation at rupture. We used attenuated total reflectance Fourier transform infrared microscopy (ATR-FTIR) to analyze the changes in the material structure. This paper presents a comparative analysis of the strengths of a biodegradable material and grade H polyethylene film (manufactured to GOST 10354-82). PLA/PBAT’s longitudinal and transverse tensile strengths are 14.08% and 32.59% lower than those of LDPE, respectively. Nevertheless, the results indicate that, given its physical and mechanical properties, the PLA/PBAT material can be an alternative to conventional PE film food packaging. The structural study results are in good agreement with the physical and mechanical tests. Micrographs clearly show the surface deformations of the biodegradable material. They increase with the compost storage duration. The scanning microscopy (SEM) surface analysis of the original PLA/PBAT films indicated that the PLA structure is similar to that of a multilayer shell or sponge, which is visible at medium and especially high magnification. We conclude that PLA/PBAT-based biodegradable materials are potential substitutes for conventional PE polymer films.

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“…Current research in semi-finished products aims to combine natural or regenerated cellulose fibers with glass, carbon, and basalt fibers to improve mechanical properties [ 24 , 25 , 26 , 27 ]. Another field of research is the use of biopolymers, biodegradable plastics [ 28 , 29 , 30 , 31 , 32 , 33 , 34 ], as well as recycled plastics [ 35 , 36 , 37 , 38 ]. Flame retardants for composites with wood fibers and polypropylene were investigated by Ayrilmis and his colleagues.…”

Section: Introductionmentioning

confidence: 99%

Thermoplastic Hybrid Composites with Wood Fibers: Bond Strength of Back-Injected Structures

et al. 2022

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Due to their lightweight potential and good eco-balance, thermoplastic hybrid composites with natural fiber reinforcement have long been used in the automotive industry. A good alternative to natural fibers is wood fibers, which have similar properties but are also a single-material solution using domestic raw materials. However, there has been hardly any research into wood fibers in thermoplastic back-injected hybrid composites. This article compares the bond strength of an injection molded rib from polypropylene (PP) and wood fibers to different non-wovens. The non-wovens consisted of wood fibers (spruce) or alternatively natural fibers (kenaf, hemp), both with a polypropylene matrix. Pull-off and instrumented puncture impact tests show that, given similar parameters, the natural and wood-fiber-hybrid composites exhibit very similar trends in bond strength. Further tests using viscosity measurements, microscopy, and computed tomography confirm the results. Wood-fiber-reinforced thermoplastic hybrid composites can thus compete with the natural fiber composites in terms of their mechanical behavior and therefore present a good alternative in technical semi-structural applications.

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Thermo-Oxidative Destruction and Biodegradation of Nanomaterials from Composites of Poly(3-hydroxybutyrate) and Chitosan

Cited by 4 publications

References 52 publications

Biological and Oxidative Degradation of Ultrathin-Fibrous Nonwovens Based on Poly(lactic Acid)/Poly(3-Hydroxybutyrate) Blends

Biological and Oxidative Degradation of Ultrathin-Fibrous Nonwovens Based on Poly(lactic Acid)/Poly(3-Hydroxybutyrate) Blends

Physical, Mechanical, and Structural Properties of the Polylactide and Polybutylene Adipate Terephthalate (PBAT)-Based Biodegradable Polymer during Compost Storage

Thermoplastic Hybrid Composites with Wood Fibers: Bond Strength of Back-Injected Structures

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