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Comparison of dust released from sanding conventional and nanoparticle-doped wall and wood coatings

机译：比较常规打磨的纳米涂料和墙面涂料和木器涂料释放的粉尘

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摘要

Introduction of engineered nanoparticles (ENPs) into traditional surface coatings (e.g., paints, lacquers, fillers) may result in new exposures to both workers and consumers and possibly also a new risk to their health. During finishing and renovation, such products may also be a substantial source of exposure to ENPs or aggregates thereof. This study investigates the particle size distributions (5.6 nm–19.8 μm) and the total number of dust particles generated during sanding of ENP-doped paints, lacquers, and fillers as compared to their conventional counterparts. In all products, the dust emissions from sanding were found to consist of five size modes: three modes under 1 μm and two modes around 1 and 2 μm. Corrected for the emission from the sanding machine, the sanding dust, was dominated by 100–300 nm size particles, whereas the mass and surface area spectra were dominated by the micrometer modes. Adding ENPs to the studied products only vaguely affected the geometric mean diameters of the particle modes in the sanding dust when compared to their reference products. However, we observed considerable differences in the number concentrations in the different size modes, but still without revealing a clear effect of ENPs on dust emissions from sanding.
机译：将工程纳米颗粒（ENP）引入传统的表面涂料（例如油漆，清漆，填料）中可能会给工人和消费者带来新的暴露，并可能对其健康造成新的风险。在整理和翻新过程中，此类产品可能也是暴露于ENP或其聚集体的重要来源。这项研究调查了与传统涂料相比，ENP掺杂的涂料，清漆和填料在打磨过程中产生的粒径分布（5.6？nm–19.8？μm）和灰尘颗粒总数。在所有产品中，发现打磨产生的粉尘排放包括五种尺寸模式：在1μm以下的三种模式以及在11μm和2μm附近的两种模式。经过砂光机的排放校正后，砂光粉尘主要由100-300 sizenm大小的颗粒占据，而质量和表面积光谱则由微米模式占主导。与参考产品相比，向研究产品中添加ENP仅模糊地影响了砂尘中颗粒模式的几何平均直径。但是，我们观察到在不同尺寸模式下，数字浓度存在相当大的差异，但仍未揭示出ENP对打磨产生的粉尘排放的明显影响。

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