A comprehensive review on recent advancements in biodegradation and sustainable management of biopolymers

Awasthi, Sanjeev Kumar; Kumar, Manish; Kumar, Vinay; Sarsaiya, Surendra; Anerao, Prathmesh; Ghosh, Pooja; Singh, Lal; Liu, Hong; Zhang, Zengqiang; Awasthi, Mukesh Kumar

doi:10.1016/j.envpol.2022.119600

Cited by 72 publications

(22 citation statements)

References 206 publications

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“…Polyhydroxyalkanoates (PHA) are actively studied degradable biopolymers intended to solve the problems associated with the global accumulation of plastic waste in the biosphere and with the elimination of deficit in functional materials for special purposes [ 1 , 2 , 3 , 4 ]. PHA is a family of polymers of various compositions whose physicochemical properties (molecular weight, crystallinity, degradation rates in biological media) vary significantly depending on the chemical structure [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis and Properties of a P(3HB-co-3HV-co-4HV) Produced by Cupriavidus necator B-10646

et al. 2022

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Synthesis of P(3HB-co-3HV-co-4HV) copolymers by the wild-type strain Cupriavidus necator B-10646 on fructose or sodium butyrate as the main C-substrate with the addition of γ-valerolactone as a precursor of 3HV and 4HV monomers was studied. Bacterial cells were cultivated in the modes that enabled production of a series of copolymers with molar fractions of 3HV (from 7.3 to 23.4 mol.%) and 4HV (from 1.9 to 4.7 mol.%) with bacterial biomass concentration (8.2 ± 0.2 g/L) and PHA content (80 ± 2%). Using HPLC, DTA,DSC, X-Ray, SEM, and AFM, the physicochemical properties of copolymers and films prepared from them have been investigated as dependent on proportions of monomers. Copolymers are characterized by a reduced degree of crystallinity (Cx 38–49%) molecular weight characteristics Mn (45–87 kDa), and Mw (201–248 kDa) compared with P(3HB). The properties of the films surface of various composition including the porosity and surface roughness were studied. Most of the samples showed a decrease in the average pore area and an increase in their number with a total increase in 3HV and 4HV monomers. The results allow scaling up the productive synthesis of P(3HB-co-3HV-co-4HV) copolymers using Cupriavidus necator B-10646.

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Section: Introductionmentioning

confidence: 99%

Biosynthesis and Properties of a P(3HB-co-3HV-co-4HV) Produced by Cupriavidus necator B-10646

et al. 2022

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“…PLA is often not biosynthesized [ 1 ], and no enzyme that specifically catalyzes LA to produce lactyl-CoA in nature is known [ 60 ]. A whole-cell biosynthetic system, consisting of a one-step synthesis of LA-based polyesters by developing a lactate-polymerizing enzyme was reported for the first time by Taguchi in 2008 [ 83 ].…”

Section: Polyesters From Labmentioning

confidence: 99%

“…Biopolymers are generally defined as polymers from natural/biological sources that are either synthesized from biological material or biosynthesized by living organisms such as bacteria, yeasts, and mold species. According to the standard EN 13432, emphasizing the role of the substrates used in their production, biopolymers are polymers produced from renewable resources [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Biopolymers Produced by Lactic Acid Bacteria: Characterization and Food Application

et al. 2023

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Plants, animals, bacteria, and food waste are subjects of intensive research, as they are biological sources for the production of biopolymers. The topic links to global challenges related to the extended life cycle of products, and circular economy objectives. A severe and well-known threat to the environment, the non-biodegradability of plastics obliges different stakeholders to find legislative and technical solutions for producing valuable polymers which are biodegradable and also exhibit better characteristics for packaging products. Microorganisms are recognized nowadays as exciting sources for the production of biopolymers with applications in the food industry, package production, and several other fields. Ubiquitous organisms, lactic acid bacteria (LAB) are well studied for the production of exopolysaccharides (EPS), but much less as producers of polylactic acid (PLA) and polyhydroxyalkanoates (PHAs). Based on their good biodegradability feature, as well as the possibility to be obtained from cheap biomass, PLA and PHAs polymers currently receive increased attention from both research and industry. The present review aims to provide an overview of LAB strains’ characteristics that render them candidates for the biosynthesis of EPS, PLA, and PHAs, respectively. Further, the biopolymers’ features are described in correlation with their application in different food industry fields and for food packaging. Having in view that the production costs of the polymers constitute their major drawback, alternative solutions of biosynthesis in economic terms are discussed.

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“…The intensive use of non-destructible synthetic plastics and their accumulation in the biosphere is a global environmental problem [ 1 , 2 ], the solution of which is a gradual transition to degradable materials [ 3 , 4 ]. Among degradable polymeric materials, a special place belongs to polyhydroxyalkanoates (PHAs)—polymers of microbiological origin.…”

Section: Introductionmentioning

confidence: 99%

Modification of Polyhydroxyalkanoates Polymer Films Surface of Various Compositions by Laser Processing

et al. 2023

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The results of surface modification of solvent casting films made from polyhydroxyalkanoates (PHAs) of various compositions are presented: homopolymer poly-3-hydroxybutyrate P(3HB) and copolymers comprising various combinations of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3HV), 4-hydroxybutyrate(4HB), and 3-hydroxyhexanoate (3HHx) monomers treated with a CO2 laser in continuous and quasi-pulsed radiation modes. The effects of PHAs film surface modification, depending on the composition and ratio of monomers according to the results of the study of SEM and AFM, contact angles of wetting with water, adhesion and growth of fibroblasts have been revealed for the laser radiation regime used. Under continuous irradiation with vector lines, melted regions in the form of grooves are formed on the surface of the films, in which most of the samples have increased values of the contact angle and a decrease in roughness. The quasi-pulse mode by the raster method causes the formation of holes without pronounced melted zones, the total area of which is lower by 20% compared to the area of melted grooves. The number of viable fibroblasts NIH 3T3 on the films after the quasi-pulse mode is 1.5–2.0 times higher compared to the continuous mode, and depends to a greater extent on the laser treatment mode than on the PHAs’ composition. The use of various modes of laser modification on the surface of PHAs with different compositions makes it possible to influence the morphology and properties of polymer films in a targeted manner. The results that have been obtained contribute to solving the critical issue of functional biodegradable polymeric materials.

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A comprehensive review on recent advancements in biodegradation and sustainable management of biopolymers

Cited by 72 publications

References 206 publications

Biosynthesis and Properties of a P(3HB-co-3HV-co-4HV) Produced by Cupriavidus necator B-10646

Biosynthesis and Properties of a P(3HB-co-3HV-co-4HV) Produced by Cupriavidus necator B-10646

Biopolymers Produced by Lactic Acid Bacteria: Characterization and Food Application

Modification of Polyhydroxyalkanoates Polymer Films Surface of Various Compositions by Laser Processing

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