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Combined extraction and functionalization of low-cost nanoparticles from municipal solid waste fly ash through PICVD

Donya Farhanian, Christopher Alex Dorval Dion, Wendell Raphael, Gregory De Crescenzo and Jason Robert Tavares

Article (2014)

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Cite this document: Farhanian, D., Dorval Dion, C. A., Raphael, W., De Crescenzo, G. & Tavares, J. R. (2014). Combined extraction and functionalization of low-cost nanoparticles from municipal solid waste fly ash through PICVD. Journal of Environmental Chemical Engineering, 2(4), p. 2242-2251. doi:10.1016/j.jece.2014.09.019
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Abstract

While nanoparticles have been the focus of intensive research for several years as a result of their remarkable surface-driven properties, they remain, for the most part, stuck in the lab. This unfortunate fact can be explained by three main reasons: (1) most studies have not dealt with the scalability and cost issues related to the use of nanomaterials on an industrial scale; (2) a great deal of focus has been applied to “outlier” results that promise far more than can be delivered; and (3) very little attention has been given to surface engineering. We propose to curtail the significant cost issue by extracting low-cost, low-grade nanoparticles that are appropriate for several applications from a ubiquitous and abundant feed stock: fly ash from municipal solid waste (MSW) incineration. The novel technique we apply is capable of both extraction and functionalization of the nanoparticles present in this undervalued waste stream using photo-initiated chemical vapor deposition (PICVD). By setting functionalization conditions to favor hydrophilic surface properties, the treated ash can readily be dispersed in a polar solvent such as water: larger particulates then settle out of suspension, while the lighter nanoparticles remain in the supernatant and are ready for use. While it is true that this method yields low-grade nanoparticles (polydisperse and multi-composite), these can be used in a variety of applications where composition is less crucial, such as increasing the thermal conductivity of composites and nanofluids.

Uncontrolled Keywords

PICVD, Nanoparticles, Functionalization, Surface functionalization, MSW fly ash

Open Access document in PolyPublie
Subjects: 1800 Génie chimique > 1800 Génie chimique
2000 Science et technologie des matériaux > 2004 Polymères et revêtements
Department: Département de génie chimique
Research Center: Non applicable
Funders: CRSNG/NSERC
Grant number: RGPIN 418847-2013
Date Deposited: 03 Oct 2017 14:43
Last Modified: 24 Oct 2018 16:12
PolyPublie URL: https://publications.polymtl.ca/2781/
Document issued by the official publisher
Journal Title: Journal of Environmental Chemical Engineering (vol. 2, no. 4)
Publisher: Elsevier
Official URL: https://doi.org/10.1016/j.jece.2014.09.019

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