NDLI: Aggressive Impacts Affecting the Biodegradable Ultrathin Fibers Based on Poly(3-Hydroxybutyrate), Polylactide and Their Blends: Water Sorption, Hydrolysis and Ozonolysis

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Aggressive Impacts Affecting the Biodegradable Ultrathin Fibers Based on Poly(3-Hydroxybutyrate), Polylactide and Their Blends: Water Sorption, Hydrolysis and Ozonolysis

Content Provider	MDPI
Author	Olkhov, Anatoly Tyubaeva, Polina Vetcher, Alexandre Karpova, Svetlana Kurnosov, Alexander Rogovina, Svetlana Iordanskii, Alexey Berlin, Alexander
Copyright Year	2021
Description	Ultrathin electrospun fibers of pristine biopolyesters, poly(3-hydroxybutyrate) (PHB) and polylactic acid (PLA), as well as their blends, have been obtained and then explored after exposure to hydrolytic (phosphate buffer) and oxidative (ozone) media. All the fibers were obtained from a co-solvent, chloroform, by solution-mode electrospinning. The structure, morphology, and segmental dynamic behavior of the fibers have been determined by optical microscopy, SEM, ESR, and others. The isotherms of water absorption have been obtained and the deviation from linearity (the Henry low) was analyzed by the simplified model. For PHB-PLA fibers, the loss weight increments as the reaction on hydrolysis are symbate to water absorption capacity. It was shown that the ozonolysis of blend fibrils has a two-stage character which is typical for O3 consumption, namely, the pendant group’s oxidation and the autodegradation of polymer molecules with chain rupturing. The first stage of ozonolysis has a quasi-zero-order reaction. A subsequent second reaction stage comprising the back-bone destruction has a reaction order that differs from the zero order. The fibrous blend PLA/PHB ratio affects the rate of hydrolysis and ozonolysis so that the fibers with prevalent content of PLA display poor resistance to degradation in aqueous and gaseous media.
Starting Page	941
e-ISSN	20734360
DOI	10.3390/polym13060941
Journal	Polymers
Issue Number	6
Volume Number	13
Language	English
Publisher	MDPI
Publisher Date	2021-03-18
Access Restriction	Open
Subject Keyword	Polymers Textiles Poly(3-hydroxybutyrate) Polylactide Blends Ultrathin Fibers Electrospinning
Content Type	Text
Resource Type	Article

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