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20 resultsShowing papers similar to Enzymatic Self-Biodegradation of Poly(l-lactic acid) Films by Embedded Heat-Treated and Immobilized Proteinase K
ClearPlastics with embedded particles decompose in days instead of years
Researchers developed a novel 'self-digesting' plastic by embedding plastic-eating enzymes inside the polymer during manufacturing, allowing it to degrade within days under industrial composting conditions rather than years. This approach could help solve the microplastic problem by making plastic biodegradation faster and more complete.
Evaluation of Functional and Degradation Properties of Enzyme‐Embedded PLA Films: A Multi‐Analytical Approach and Evaluation of Microplastics Post‐Degradation
This study developed polylactic acid (PLA) films embedded with enzymes designed to help the material degrade more quickly, and then characterized what happens to the plastic during and after degradation — including what kind of microplastic residues are left behind. While enzyme addition accelerated surface breakdown and increased porosity, it also slightly reduced the film's mechanical and thermal strength. Critically, investigating the microplastic byproducts of degradable plastics is important for ensuring that "eco-friendly" materials do not simply create a new wave of micro- and nanoplastic pollution.
Spectrophotometric-Based Assay to Quantify Relative Enzyme-Mediated Degradation of Commercially Available Bioplastics
Researchers developed a simple spectrophotometric assay to screen enzymes for their ability to break down commercially available bioplastics, finding that Proteinase K and PLA depolymerase can degrade about 20-30% of polylactic acid (PLA) plastic overnight. While bioplastics are promoted as eco-friendly alternatives to conventional plastics, many persist in natural environments, so identifying effective degrading enzymes is a critical step toward preventing bioplastic accumulation. This rapid assay could accelerate the search for microbial solutions to the growing bioplastic waste problem.
The Hydrolytic Behavior of Poly(Lactic Acid)/Polystyrene‐ Grafted‐Hectorite Nanocomposite Films and Its Regulatory Mechanism on Microplastics
Researchers tested how polylactic acid (PLA) films and PLA/hectorite nanocomposite films degrade in aqueous solutions of different pH levels. The nanocomposite films degraded more slowly and released fewer microplastic fragments than pure PLA, suggesting that clay mineral incorporation could reduce secondary microplastic generation from biodegradable plastics.
Thermal Embedding of Humicola insolens Cutinase: A Strategy for Improving Polyester Biodegradation in Seawater
Researchers embedded a commercially available enzyme into biodegradable polyester films to accelerate their breakdown in seawater. The study found that these enzyme-embedded films achieved biodegradability equal to or greater than cellulose standards in natural seawater, while maintaining their original physical properties. This approach suggests a practical strategy for reducing the contribution of slow-degrading biodegradable plastics to marine microplastic pollution.
Microbial Degradation of Polylactic Acid Bioplastic
This review covers how microorganisms degrade polylactic acid (PLA) bioplastic under different environmental conditions. Understanding PLA biodegradation is important for assessing whether PLA products actually break down as intended in real-world environments rather than persisting as microplastics.
Polylactic acid synthesis, biodegradability, conversion to microplastics and toxicity: a review
Researchers reviewed polylactic acid (PLA), a popular plant-based "biodegradable" plastic used in packaging and agriculture, finding that while it breaks down inside the body, it does not fully degrade under natural outdoor or aquatic conditions — and in fact fragments into microplastics faster than conventional petroleum-based plastics. This challenges the assumption that bioplastics are a straightforward environmental solution.
Bioabsorbable Characteristics of Poly (Lactic Acid) (PLA) for a Fundamental Solution to the Problem of Microplastics Tea Bag SOILON® Made from PLA Fibers
This review examines the biodegradation characteristics of polylactic acid (PLA) materials, discussing the enzymatic and environmental conditions needed for effective breakdown and evaluating PLA's potential as a genuinely biodegradable alternative to conventional petroleum-based plastics.
State of the art on biodegradability of bio-based plastics containing polylactic acid
This review examines whether bio-based plastics made from polylactic acid (PLA) actually break down in the environment as intended. While certain microorganisms can degrade PLA, the process is slow and depends heavily on conditions like temperature and moisture. The findings matter because if bio-based plastics do not fully break down, they can still fragment into microplastics, posing many of the same environmental and health risks as conventional plastics.
Near-complete depolymerization of polyesters with nano-dispersed enzymes
Researchers developed a method to embed tiny enzyme particles inside biodegradable plastics, enabling the plastics to break down almost completely in ordinary compost and tap water within days. This approach achieved up to 98% conversion of the plastic back to small molecules, avoiding the creation of microplastic fragments that occur with conventional degradation. The technology could help solve the microplastic pollution problem by ensuring that biodegradable plastics actually decompose fully rather than fragmenting into harmful microplastic particles.
Recent trends in microbial and enzymatic plastic degradation: a solution for plastic pollution predicaments
This review covers recent advances in using microorganisms and their enzymes to break down plastics including polyethylene, PVC, polystyrene, and PET, with techniques like protein engineering being used to boost enzyme efficiency. Microbial degradation offers a sustainable approach to reducing the persistent plastic pollution that generates the microplastics found throughout the environment and human body.
Modification of Poly(lactic acid) by the Plasticization for Application in the Packaging Industry
Researchers investigated the modification of poly(lactic acid) through plasticization to improve its mechanical properties for use in packaging industry applications as a biodegradable alternative to conventional plastics.
Review on plastic wastes in marine environment – Biodegradation and biotechnological solutions
Researchers reviewed plastic biodegradation in the marine environment, cataloguing microbial communities that colonize plastic surfaces and the enzymes they produce, while highlighting biotechnological strategies — including enzyme engineering and biofilm optimization — as necessary complements to physical and chemical approaches for reducing micro- and nanoplastic contamination.
Not Only Diamonds Are Forever: Degradation of Plastic Films in a Simulated Marine Environment
Researchers found that biodegradable plastics, including polylactic acid (PLA), do not fully degrade in simulated marine environments at realistic temperatures and conditions. This challenges the assumption that biodegradable plastics are a straightforward solution to ocean plastic pollution.
Biodegradation of microplastics: Advancement in the strategic approaches towards prevention of its accumulation and harmful effects
This review assessed advances in strategic approaches to microplastic biodegradation, covering microbial enzymes, biofilm-mediated degradation, and conditions that enhance breakdown rates, with the goal of identifying practical paths to reducing environmental microplastic accumulation.
Microbial degradation of plastics in the environment: Mechanisms, enzymatic pathways, and constraints from laboratory studies to environmental reality
Researchers reviewed microbial and insect-mediated plastic biodegradation, finding that while a wide range of bacteria and fungi can degrade common polymers and PETase enzymes have been substantially improved through protein engineering, degradation rates measured in optimized laboratory settings likely overestimate real-world performance under natural constraints like low temperature and nutrient limitation.
Characterization and engineering of a plastic-degrading aromatic polyesterase
Researchers characterized and engineered an aromatic polyesterase enzyme capable of degrading plastic polymers, improving its activity through protein engineering and demonstrating its potential as a tool for biodegradation-based plastic cleanup.
Embedding an esterase mimic inside polyesters to realize rapid and complete degradation without compromising their utility
Researchers developed an innovative approach to accelerating plastic degradation by embedding a molecular mimic of the enzyme esterase directly inside a biodegradable polyester material. This allowed the plastic to break down rapidly and completely during composting without compromising its performance during normal use. The study presents a practical strategy for managing post-consumer biodegradable plastics and improving composting efficiency.
Enzymatic Degradation of Polyethylene Terephthalate Plastics by Bacterial Curli Display PETase
Researchers engineered bacteria to display a PET-degrading enzyme on their surface, creating a reusable biocatalyst capable of breaking down polyethylene terephthalate plastics. The system worked under various conditions, remained stable for at least 30 days, and could even degrade PET microplastics in wastewater and highly crystalline consumer plastic waste. This biological approach offers a promising environmentally friendly alternative for plastic recycling and waste treatment.
Fate of polylactic acid microplastics during anaerobic digestion of kitchen waste: Insights on property changes, released dissolved organic matters, and biofilm formation
Polylactic acid (PLA) microplastics were tracked through the anaerobic digestion of kitchen waste, revealing that PLA particles underwent surface changes and released dissolved organic matter but were not fully degraded during the process. The study shows that even supposedly biodegradable plastics can persist and alter biofilm formation in anaerobic digestion systems.