Thin polyethylene (LDPE) films with controlled crystalline morphology for studying plastic weathering and microplastic generation

Replicating real-world microplastics with accelerated physicochemical ageing

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Researchers developed methods to artificially age microplastics in the lab so they accurately replicate the physicochemical properties of microplastics found in real-world environments. Environmentally realistic aged microplastics are essential for generating reliable toxicology data, since fresh plastic particles behave differently than weathered ones that organisms actually encounter.

Imitating the Weathering of Microplastics in the Marine Environment

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Laboratory weathering experiments simulating UV exposure, mechanical abrasion, and saltwater immersion accelerated the fragmentation of plastic samples into microplastics, replicating processes that occur over years in the marine environment. Understanding these degradation mechanisms is essential for predicting how quickly plastic debris transforms into the smaller particles that are most difficult to remove and most readily ingested by marine organisms.

Degradation of low-density polyethylene to nanoplastic particles by accelerated weathering

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Researchers demonstrated that accelerated weathering of low-density polyethylene produces nanoplastic particles, providing experimental evidence for the degradation pathway from macro-plastics to nanoscale fragments in the environment.

Combined abiotic and biotic weathering of microplastic particles: Alterations of their physicochemical properties and interactions with cells

Aging assessment of microplastics (LDPE, PET and uPVC) under urban environment stressors

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Researchers aged LDPE, PET, and uPVC microplastics using ozone, UV-C, and solar radiation to simulate urban environmental stressors, finding that each aging agent produced distinct changes in surface morphology, chemical structure, and crystallinity that could alter particle behavior in the environment.