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Production and Characterization of Polyethylene Terephthalate Nanoparticles
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Researchers developed a simple, scalable milling method for producing polyethylene terephthalate (PET) nanoparticles from commercial pellets for use in laboratory toxicology and environmental studies. The method avoids the need for liquid nitrogen and produces representative model nanoplastics at low cost with high yield. The study addresses a key barrier in nanoplastics research by providing accessible reference particles that more closely resemble environmental plastic debris.
Microplastic (MP) pollution represents one of the biggest environmental problems that is further exacerbated by the continuous degradation in the marine environment of MPs to nanoplastics (NPs). The most diffuse plastics in oceans are commodity polymers, mainly thermoplastics widely used for packaging, such as polyethylene terephthalate (PET). However, the huge interest in the chemical vector role of micro/nanoplastics, their fate and negative effects on the environment and human health is still under discussion and the research is still sparse due also to the difficulties of sampling MPs and NPs from the environment or producing NPs in laboratory. Moreover, the research on MPs and NPs pollution relies on the availability of engineered nanoparticles similar to those present in the marine environment for toxicological, transport and adsorption studies in biological tissues as well as for wastewater remediation studies. This work aims to develop an easy, fast and scalable procedure for the production of representative model nanoplastics from PET pellets. The proposed method, based on a simple and economic milling process, has been optimized considering the peculiarities of the polymer. The results demonstrated the reliability of the method for preparing particle suspensions for aquatic microplastic research, with evident advantages compared to the present literature procedures, such as low cost, the absence of liquid nitrogen, the short production time, the high yield of the process, stability, reproducibility and polydisperse size distribution of the produced water dispersed nanometric PET.
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Researchers developed a laser ablation approach to generate polyethylene terephthalate (PET) nanoplastic model particles that more closely mimic real environmental nanopollutants than synthetically produced colloid-chemistry samples. The resulting PET nanoparticles were characterized for chemical and physical properties and stability in different media, and their toxicology was assessed to evaluate interactions with biological systems.
Laser Ablation as a Versatile Tool To Mimic Polyethylene Terephthalate Nanoplastic Pollutants: Characterization and Toxicology Assessment
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Researchers developed a laser ablation method to produce polyethylene terephthalate (PET) nanoplastics that closely mimic those found in the environment, unlike commercially available engineered nanoparticles. Toxicology tests on marine organisms showed that these realistic PET nanoplastics caused measurable biological effects, suggesting that the method provides a more accurate tool for studying nanoplastic impacts.
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Researchers tested and compared chemical and physical methods for producing PET micro- and nanoparticles in the laboratory, evaluating each approach's ability to control particle size, shape, and purity. They found that each method has distinct trade-offs, with top-down grinding producing irregularly shaped particles more representative of environmental debris while bottom-up chemical methods offer better size control. The study provides practical guidance for standardizing how reference plastic particles are prepared for environmental research.
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Researchers developed a size-controlled method for preparing polyethylene nanoplastic model particles using nanoprecipitation, investigating how polymer solution concentration and volume affect particle size. The study provides a reliable approach for producing well-characterized polyolefin nanoplastics for use in toxicological and environmental research, addressing the previous lack of appropriate model particles for studying the risks of these prevalent plastic contaminants.
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