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Title of Journal: J Nanopart Res

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Abbravation: Journal of Nanoparticle Research

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Springer Netherlands

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DOI

10.1002/aoc.1232

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1572-896X

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Influence of paints formulations on nanoparticles

Authors: Brice Fiorentino Luana Golanski Arnaud Guiot JeanFrançois Damlencourt Delphine Boutry
Publish Date: 2015/03/19
Volume: 17, Issue: 3, Pages: 149-
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Abstract

Pristine nanoparticles NPs may present a hazard to humans and the environment and hence it is important to know to what extent NPs can be freely released from commercialized products in which they are added The purpose of this study was to identify the parameters of the paint formulation containing SiO2 NPs of 19nm diameter that could have an impact on the release induced by aging and abrasion In order to simulate outdoor aging during the life cycle of the product painted panels were exposed to accelerated weathering experiments in accordance with the norm EN ISO 1647432013 The surface modification of these paints was characterized by scanning electron microscope coupled with energy dispersive spectrometry SEM–EDS These analyses showed that the acrylic copolymer binder has undergone a more significant chemical degradation compared with the styreneacrylic copolymer To simulate a mechanical aging abrasion tests were conducted using a Taber Abraser simulating critical scenarios of the abrasion standard The particle size distributions and particle concentrations of the abraded particles were measured using an electric lowpressure impactor After accelerated aging and abrasion tests we observed a link between the paint degradations occurring with the release of pristine NPs and the embedded pristine NPs Surface degradation of acrylic copolymer paints was more significant than that of the styreneacrylic copolymer paints and this induced a release of NPs 27 times higher Other parameters like TiO2 addition as pigments induced a strong stability of paint against light and water decreasing the total number of NPs released from paints from 30000 to 1200 particles/cm3 These results revealed that formulations can be tuned to decrease the number of free NPs released and get a “safebydesign” product

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