Nanoplastic production procedure for scientific purposes: PP, PVC, PE-LD, PE-HD, and PS

Patricia Merdy; Floriane Delpy; Adrien Bonneau; Sylvie Villain; Lucian Iordachescu; Jes Vollertsen; Yves Lucas

doi:10.1016/j.heliyon.2023.e18387

Nanoplastic production procedure for scientific purposes: PP, PVC, PE-LD, PE-HD, and PS

Heliyon. 2023 Jul 17;9(8):e18387. doi: 10.1016/j.heliyon.2023.e18387. eCollection 2023 Aug.

Authors

Patricia Merdy¹, Floriane Delpy¹, Adrien Bonneau¹, Sylvie Villain¹, Lucian Iordachescu², Jes Vollertsen², Yves Lucas¹

Affiliations

¹ Université de Toulon, Aix Marseille University, CNRS, IM2NP, 83041, Toulon, France.
² Aalborg University, Department of the Built Environment, Thomas Manns Vej 23, 9220, Aalborg, Denmark.

Abstract

Studies on the environmental impact of nanoplastics face challenges in plastic analysis and a scarcity of nanoplastic materials necessary for the development of analytical techniques and experiments on biota impact. Here we provide detailed procedures for obtaining nanoparticles suspended in water for the most commonly used polymers: Polypropylene (PP), Polyvinylchloride (PVC), Low- and High-Density Polyethylene (PE-LD, PE-HD), and Polystyrene (PS). We dissolved larger size material to reprecipitate nanoparticles. For all plastic types, we obtained nanoparticles with a size between 50 and 300 nm, and a mainly spherical morphology. We verified that no irreversible agglomeration or coalescence of the particles occurred after 5 days of storage. The concentrations obtained in the final carrier solution were of the order of 10⁹ particles mL^-1. To prevent the persistence of reagents in the final carrier solution, a filtration step was implemented at the end of the process. The method proved unsuitable for Polyethylene Terephthalate (PET).

Keywords: Dissolution-precipitation; Nanoparticles production; Nanoplastics.