Advances in microbial exoenzymes bioengineering for improvement of bioplastics degradation

Chemosphere, Год журнала: 2024, Номер 355, С. 141749 - 141749

Опубликована: Март 21, 2024

Plastic pollution has become a major global concern, posing numerous challenges for the environment and wildlife. Most conventional ways of plastics degradation are inefficient cause great damage to ecosystems. The development biodegradable offers promising solution waste management. These designed break down under various conditions, opening up new possibilities mitigate negative impact traditional plastics. Microbes, including bacteria fungi, play crucial role in bioplastics by producing secreting extracellular enzymes, such as cutinase, lipases, proteases. However, these microbial enzymes sensitive extreme environmental temperature acidity, affecting their functions stability. To address challenges, scientists have employed protein engineering immobilization techniques enhance enzyme stability predict structures. Strategies improving substrate interaction, increasing thermostability, reinforcing bonding between active site substrate, refining activity being utilized boost functionality. Recently, bioengineering through gene cloning expression potential microorganisms, revolutionized biodegradation bioplastics. This review aimed discuss most recent strategies modifying bioplastic-degrading terms functionality, thermostability enhancement, binding site, with other improvement surface action. Additionally, discovered exoenzymes metagenomics were emphasized.

Язык: Английский

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Natural Antioxidants: Advancing Stability and Performance in Sustainable Biobased and Biodegradable Plastics

Compounds, Год журнала: 2025, Номер 5(1), С. 4 - 4

Опубликована: Фев. 3, 2025

The depletion of fossil fuels and environmental concerns have driven the development sustainable materials, including bio-based biodegradable plastics, as alternatives to conventional plastics. Although these plastics aid in waste management climate change mitigation, their vulnerability oxidative degradation impacts longevity, durability, performance. Natural antioxidants such tocopherols, flavonoids, tannins, extracted from plants or agri-food waste, present a alternative synthetic stabilizers by enhancing thermal stability polymers like poly(lactic acid) (PLA), poly(butylene succinate) (PBS), succinate-adipate) (PBSA), adipate-co-terephthalate) (PBAT), poly(hydroxyalkanoate) (PHA), starch-based materials. This review highlights recent advances stabilized with natural antioxidants, mechanisms action, role improving material properties for applications packaging. Additionally, it explores impact on recycling processes, advancements composite production techniques, future research directions. Bioplastics can achieve enhanced performance, reduce support circular economy incorporating antioxidants.

Язык: Английский

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Bio-based plastics, biodegradable plastics, and compostable plastics: biodegradation mechanism, biodegradability standards and environmental stratagem

International Biodeterioration & Biodegradation, Год журнала: 2024, Номер 195, С. 105887 - 105887

Опубликована: Авг. 20, 2024

Язык: Английский

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Synthetic biology strategies for sustainable bioplastic production by yeasts

The Journal of Microbiology, Год журнала: 2025, Номер 63(3), С. e2501022 - e2501022

Опубликована: Март 28, 2025

Язык: Английский

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Unveiling the potential of microalgae for bioplastic production from wastewater – current trends, innovations, and future prospects

Deleted Journal, Год журнала: 2024, Номер 1(1)

Опубликована: Сен. 2, 2024

Bioplastics derived from polyhydroxyalkanoates (PHAs) are among the promising substitutes for unsustainable petroleum-based polymers. PHA-based polymers demonstrate superior chemical and physical properties, such as hydrophobicity, insolubility in water, iso-tacticity, UV resistance, hydrolysis absolute biodegradability. Compared with conventional plastics, bioplastics more beneficial due to their reduced carbon footprint, energy efficiency, biodegradability, biocompatibility, have hence revolutionized polymer industry. However, further research is needed explore novel strategies overcome limitations, decreasing water absorption brittleness, while increasing crystallization ability thermal degradation temperature. These constraints can be addressed by supplementing bioplastic synthesis process reinforcements plasticizers. The development adoption of biopolymers an environmentally friendly economically viable synthetic plastics imperative, considering degree subsequent exhaustion petrochemical supplies worldwide environmental contamination instigated industrial production plastics. goal this appraisal provide in-depth account most recent advancements generation various wastewater streams via use microalgae, harvesting technologies. microalgae higher quality made polymeric biomolecules include based on cellulose, starch, proteins, PHA, polyhydroxybutyrate (PHB), polyethylene (PE), polylactic acid (PLA), poly vinyl chloride (PVC). Various types manufacturing methodologies also been highlighted researchers capitalists alike investigate ways harness these renewable resources sustainable bioplastics. Additionally, innovations, challenges, potential possibilities future, life cycle evaluations addressed.

Язык: Английский

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Carbon Recycling of High Value Bioplastics: A Route to a Zero-Waste Future

Polymers, Год журнала: 2024, Номер 16(12), С. 1621 - 1621

Опубликована: Июнь 7, 2024

Today, 98% of all plastics are fossil-based and non-biodegradable, globally, only 9% recycled. Microplastic nanoplastic pollution is just beginning to be understood. As the global demand for sustainable alternatives conventional continues rise, biobased biodegradable have emerged as a promising solution. This review article delves into pivotal concept carbon recycling pathway towards achieving zero-waste future through production utilization high-value bioplastics. The comprehensively explores current state bioplastics (biobased and/or materials), emphasizing importance carbon-neutral circular approaches in their lifecycle. chiefly used low-value applications, such packaging single-use items. sheds light on value-added like longer-lasting components products, demanding properties, which increasingly being deployed. Based waste hierarchy paradigm—reduce, reuse, recycle—different use cases end-of-life scenarios materials will described, including technological options recycling, from mechanical chemical methods. A special emphasis common bioplastics—TPS, PLA, PHAs—as well discussion composites, provided. While it acknowledged that (waste) crisis stems largely mismanagement, needs stated radical solution must come core material side, intrinsic properties polymers formulations. manner cascaded bioplastics, labeling, legislation, technologies, consumer awareness can contribute topics this article.

Язык: Английский

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Transitioning to Microplastic-Free Seed Coatings: Challenges and Solutions

Polymers, Год журнала: 2024, Номер 16(14), С. 1969 - 1969

Опубликована: Июль 10, 2024

This review addresses the issue of replacing manufactured microplastics in seed coatings used agriculture. Firstly, it focuses on policy and regulatory actions taken at a global level. There is no consensus within scientific community definition microplastic and, more generally, classification plastic debris. Nevertheless, several decision schemes have been proposed an attempt to define notion microplastics. The different criteria relevant this definition, such as size, physical state, chemical structure, origin, persistence microplastics, are discussed, with comparison being made between REACH regulation literature. Seed production processing also functions explained order gain better understanding properties be considered substitution strategy for currently main challenges multiple; substitutes must provide same performance microplastics: (i) improving adherence treatment seed, (ii) distributing evenly over (iii) reducing amount dust-off when handling treated (iv) flowability, which particularly important during sowing stage, all while preserving physiological seed. Substitute polymers according desired functional properties: two families biopolymers were identified literature: polysaccharides proteins. Among them, 13 6 polymers, respectively, complied regulation, demonstrating adhesion, dust reduction performances, preservation quality particular. work aims guide future studies coatings, highlight research needs area. It based analysis discussion literature, identifying listing potential substitutes.

Язык: Английский

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Opportunities and Challenges in the Application of Bioplastics: Perspectives from Formulation, Processing, and Performance

Polymers, Год журнала: 2024, Номер 16(18), С. 2561 - 2561

Опубликована: Сен. 10, 2024

Tremendously negative effects have been generated in recent decades by the continuously increasing production of conventional plastics and inadequate management their waste products. This demands materials within a circular economy, easy to recycle biodegrade, minimizing environmental impact cost competitiveness. Bioplastics represent sustainable alternative this scenario. However, replacement must be addressed considering several aspects along lifecycle, from bioplastic processing final application product. In review, using different additives, biomass sources, techniques on mechanical thermal behavior, as well biodegradability, bioplastics is discussed. The importance bioplasticizers highlighted, besides studying role surfactants, compatibilizers, cross-linkers, coupling agents, chain extenders. Cellulose, lignin, starch, chitosan, composites are analyzed part non-synthetic considered. Throughout study, emphasis use well-established manufacturing processes, such extrusion, injection, compression, or blow molding, since these ones that satisfy quality, productivity, requirements for large-scale industrial production. Particular attention also given fused deposition modeling, additive technique nowadays not only used making prototypes, but it being integrated into development parts wide variety biomedical applications. Finally, recyclability commercial discussed, some future perspectives challenges bio-based with conclusion technological innovations, economic incentives, policy changes could coupled individually driven solutions mitigate impacts associated plastics.

Язык: Английский

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Microplastics in Farmed Animals—A Review

Microplastics, Год журнала: 2024, Номер 3(4), С. 559 - 588

Опубликована: Сен. 30, 2024

Environmental pollution from plastics has become one of the biggest concerns globally. Microplastics (MPs) are plastic materials less than 5 mm in size. They remain environment for hundreds to thousands years without degrading, only breaking down further nanoplastics (NPs). Micro- and can be origin many diseases carry various pathogenic substances on their surface spread them throughout biosphere, starting with contained additives ending adsorbed toxins potentially microorganisms. Exposure routes humans animals through air, water food/feed. Due placement livestock—including ruminants, fish poultry—and at top food web, any water, air or soil eventually transferred livestock humans. The presence microplastics intestines aquaculture species, ruminants poultry, instance, was found cause a change intestinal microbial population and, as result, occurrence diseases. These particles have also been observed other organs such liver, kidneys, lung, spleen, heart, ovaries, testicles animals, which causes biochemical changes, structural destruction, malfunction. While complete extent negative health impacts remains still largely unknown, ubiquitous transmission chemicals organisms is notable issue, underscoring importance gaining more comprehensive understanding potential threats posed by animal ultimately human health, coupled need drastic reduction freight into environment. This review article summarizes recent findings effect micro- farmed ultimately, Action needed reduce number thereby humans, exposed.

Язык: Английский

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Long‐Lasting Hydrophilicity Induced by Ultraviolet Light on Surface Modified Hydrophobic Polylactic Acid

Journal of Applied Polymer Science, Год журнала: 2025, Номер unknown

Опубликована: Март 22, 2025

ABSTRACT Surface treatments are used to tailor the wettability of compostable polymers for outdoor applications. However, imparting hydrophobicity can have direct and indirect consequences on polymer's eventual degradation during use. In this research, a solvent‐treated hydrophobic (water contact angle 147.2° ± 0.6°) polylactic acid (PLA) substrate could be altered significantly wicking sample (22.5° 3.1°) with single 2‐h ultraviolet‐C (UVC) exposure. Wicking behavior remains consistent even 1 year post‐exposure, implying long‐lasting hydrophilic change polymer surface. UVC irradiation induced chain scission near surface, reducing considerably molecular weight. Reduction in weight impacts properties, including lower glass transition, melting, temperatures. no significant chemical composition changes detected X‐ray Photoelectron Spectroscopy (XPS). Infrared spectroscopy has shown very minor oxidation an increasing signal peak related carbonyl groups at 1724 cm −1 from α‐cleavage. Force‐distance confirmed increase polarity UVC‐exposed surfaces. The more precisely surface relates orientation polar oxygen bonds towards made possible by scissions.

Язык: Английский

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