Chemically recyclable polymer materials: polymerization and depolymerization cycles

Green Chemistry, Journal Year: 2022, Volume and Issue: 24(6), P. 2321 - 2346

Published: Jan. 1, 2022

The design and synthesis of chemically recyclable polymers, which can be reutilized as their starting monomers or new value-added chemicals, has provided a practical approach to address the end-of-use problem polymer materials possible closed-loop method for material usage. More more attention been paid exhibit an increasing prominent role in sustainable development. Nowadays, polymers including polyesters, polythioesters, polycarbonates, polyacetals, polyamides, so on have made significant achievements. Consequently, this minireview summarizes examples achieving polymerization–depolymerization cycle access are categorized into seven parts based monomers.

Language: Английский

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Recent advances and future prospects of cellulose, starch, chitosan, polylactic acid and polyhydroxyalkanoates for sustainable food packaging applications

International Journal of Biological Macromolecules, Journal Year: 2022, Volume and Issue: 221, P. 163 - 182

Published: Sept. 5, 2022

Language: Английский

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Polyhydroxyalkanoates (PHAs) synthesis and degradation by microbes and applications towards a circular economy

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 341, P. 118033 - 118033

Published: May 6, 2023

Overusing non-degradable plastics causes a series of environmental issues, inferring switch to biodegradable plastics. Polyhydroxyalkanoates (PHAs) are promising that can be produced by many microbes using various substrates from waste feedstock. However, the cost PHAs production is higher compared fossil-based plastics, impeding further industrial and applications. To provide guideline for reducing costs, potential cheap feedstock have been summarized in this work. Besides, increase competitiveness mainstream economy, influencing parameters discussed. The degradation has reviewed related type bacteria, their metabolic pathways/enzymes, conditions. Finally, applications different fields presented discussed induce comprehension on practical potentials PHAs.

Language: Английский

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Recent advances and challenges in sustainable management of plastic waste using biodegradation approach

Bioresource Technology, Journal Year: 2023, Volume and Issue: 374, P. 128772 - 128772

Published: March 3, 2023

Versatility and desirable attributes of synthetic plastics have greatly contributed towards their wide applications. However, vast accumulation plastic wastes in environment as a result highly recalcitrant nature has given rise to pollution. Existing strategies alleviating are inadequate, there is pressing need for alternative sustainable approaches tackling In this context, biodegradation emerged environmental-friendly approach handling accumulation, due its milder less energy-intensive conditions. recent years, extensive research effort focused on the identification microorganisms enzymes with plastic-degrading abilities. This review aims provide timely holistic view current status biodegradation, focusing breakthroughs discoveries field. Furthermore, challenges associated discussed, future perspectives continuous advancement highlighted.

Language: Английский

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Biodegradable biopolymers: Real impact to environment pollution

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 947, P. 174445 - 174445

Published: July 7, 2024

Language: Английский

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Advances in systems metabolic engineering of autotrophic carbon oxide-fixing biocatalysts towards a circular economy

Metabolic Engineering, Journal Year: 2022, Volume and Issue: 71, P. 117 - 141

Published: Jan. 29, 2022

High levels of anthropogenic CO2 emissions are driving the warming global climate. If this pattern increasing does not change, it will cause further climate change with severe consequences for human population. On top this, accumulation solid waste within linear economy model is threatening biosustainability. The magnitude these challenges requires several approaches to capture and utilize carbon establish a circular economy. Microbial gas fermentation presents an exciting opportunity oxides from gaseous streams high feedstock flexibility selectivity. Here we discuss available microbial systems review in detail metabolism both anaerobic acetogens aerobic hydrogenotrophs their ability C1 feedstocks. More specifically, provide overview systems-level understanding metabolism, key metabolic pathways, scale-up opportunities commercial successes, most recent technological advances strain process engineering. Finally, also gaps advance autotrophic biocatalysts efficient economically viable production bioproducts recycled carbon.

Language: Английский

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Production and characterization of a biodegradable polymer, poly(3-hydroxybutyrate-co-3-hydroxyvalerate), using the type II methanotroph, Methylocystis sp. MJC1

Bioresource Technology, Journal Year: 2023, Volume and Issue: 389, P. 129853 - 129853

Published: Oct. 9, 2023

Language: Английский

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Cyanobacteria as cell factories for the photosynthetic production of sucrose

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 14

Published: Feb. 14, 2023

Biofuels and other biologically manufactured sustainable goods are growing in popularity demand. Carbohydrate feedstocks required for industrial fermentation processes have traditionally been supplied by plant biomass, but the large quantities to produce replacement commodity products may prevent long-term feasibility of this approach without alternative strategies sugar feedstocks. Cyanobacteria under consideration as potential candidates production carbohydrate feedstocks, with potentially lower land water requirements relative plants. Several cyanobacterial strains genetically engineered export significant sugars, especially sucrose. Sucrose is not only naturally synthesized accumulated cyanobacteria a compatible solute tolerate high salt environments, also an easily fermentable disaccharide used many heterotrophic bacteria carbon source. In review, we provide comprehensive summary current knowledge endogenous sucrose synthesis degradation pathways. We summarize genetic modifications that found increase secretion. Finally, consider state synthetic microbial consortia rely on sugar-secreting strains, which co-cultivated alongside microbes able directly convert sugars into higher-value compounds (e.g., polyhydroxybutyrates, 3-hydroxypropionic acid, or dyes) single-pot reaction. recent advances reported such cyanobacteria/heterotroph co-cultivation perspective future developments likely realize their bioindustrial potential.

Language: Английский

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The production, recovery, and valorization of polyhydroxybutyrate (PHB) based on circular bioeconomy

Biotechnology Advances, Journal Year: 2024, Volume and Issue: 72, P. 108340 - 108340

Published: March 26, 2024

Language: Английский

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Enhanced polyhydroxyalkanoate biosynthesis by Cupriavidus sp. CY-1 utilizing CO2 under controlled non-explosive conditions

Chemosphere, Journal Year: 2025, Volume and Issue: 373, P. 144181 - 144181

Published: Feb. 4, 2025

The production of polyhydroxyalkanoate (PHA) using CO2 through hydrogen-oxidizing bacteria under safe, non-explosive conditions is making impressive strides. present study aimed to evaluate and demonstrate the growth productivity PHA by Cupriavidus sp. CY-1 different conditions, thereby providing critical data for practical applications. experimental results highlighted efficiency strain in biosynthesis, achieving a rate 11.87 g L-1, which corresponds 90.6% yield when fermenting gaseous substrate composed H2 (70%), O2 (20%), (10%). also examined including concentrations 3.8% (v/v) at 6.5% (v/v). Furthermore, impact CO (30% higher) was assessed, revealing detrimental effect on production. Notably, addition Tween 80 significantly enhanced productivity. effective utilization has confirmed poly[(R)-3-hydroxybutyrate] (PHB) as valuable derived form PHA. By implementing two-step treatment with valeric acid, we successfully produced P(3HB-co-3HV) (PHBV) concentration 1.47 L-1. This achievement highlights potential enhance innovative strategies. examination phaC gene expression levels facilitated accurate predictions use from trichloroethylene (TCE) biodegradation faced concentration-related challenges; however, higher achieved phenol biodegradation, 1200 mg indicate substantial efficient

Language: Английский

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