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Microplastics and biobased polymers to combat plastics waste
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This review covers the health risks of microplastics and examines how biobased polymers like polylactic acid and other plant-derived plastics could help reduce plastic pollution. While these alternatives show promise for replacing conventional plastics, the review notes that some bioplastics still produce microplastics as they break down. The takeaway is that switching to biobased materials is part of the solution, but it will not eliminate microplastic pollution entirely.
Microplastics (MPs) have become the major global concern due to their adverse effects on the environment, human health, and hygiene. These complex molecules have numerous toxic impacts on human well-being. This review focuses on the methods for chemically quantifying and identifying MPs in real-time samples, as well as the detrimental effects resulting from exposure to them. Biopolymers offer promising solutions for reducing the environmental impact caused by persistent plastic pollution. The review also examines the significant progress achieved in the preparation and modification of various biobased polymers, including polylactic acid (PLA), poly(ε-caprolactone) (PCL), lignin-based polymers, poly-3-hydroxybutyrate (PHB), and poly(hydroxyalkanoates) (PHA), which hold promise for addressing the challenges associated with unplanned plastic waste disposal.
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Biocomposites and Poly(lactic acid) in Active Packaging: A Review of Current Research and Future Directions
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This review examines how bio-based and biodegradable materials, especially polylactic acid (PLA), are being developed as sustainable alternatives for food packaging. While these materials aim to reduce petroleum-based plastic pollution, the review notes that biodegradable plastics can still break down into microplastics during their degradation process. Understanding the full lifecycle of these alternative materials is important for determining whether they truly reduce microplastic contamination.
Synthesize and Applications of Biodegradable Plastics as a Solution for Environmental Pollution Due to Non-Biodegradable Plastics, a Review
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This review examines biodegradable plastics as alternatives to conventional petroleum-based plastics, covering materials like polylactic acid, polyhydroxyalkanoates, and polycaprolactone. Researchers detail how these polymers are synthesized from renewable resources and can be modified for various applications. The study highlights both the promise and remaining challenges of biodegradable plastics in reducing environmental pollution from non-degradable plastic waste and microplastic formation.
Plastics of the Future? An Interdisciplinary Review on Biobased and Biodegradable Polymers: Progress in Chemistry, Societal Views, and Environmental Implications
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This review examines biodegradable and biobased plastics as alternatives to conventional plastics, assessing their environmental impact five years after the authors' previous analysis. While these newer plastics show promise in reducing persistent waste, they raise their own concerns, including the potential to generate microplastics and affect soil health under certain conditions. The authors argue that a full life-cycle approach -- from raw materials to disposal -- is essential for these alternatives to truly help.
Polylactic acid synthesis, biodegradability, conversion to microplastics and toxicity: a review
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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.
Marine plastic pollution and bioplastic alternatives: a review
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This review pulls together existing research on ocean plastic pollution from fishing gear, shipping, and tourism, and looks at whether "bioplastics" (plant-based or biodegradable plastics) could help fix the problem. The catch: many bioplastics don't actually break down easily in the ocean, and some still turn into microplastics that harm marine life just like regular plastic — meaning they're not the easy fix people hope for, and those tiny plastic particles can still work their way up the food chain toward the food we eat.
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