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Membranes 2018, 8(1), 6; https://doi.org/10.3390/membranes8010006

The Effect of Surface Confined Gold Nanoparticles in Blocking the Extraction of Nitrate by PVC-Based Polymer Inclusion Membranes Containing Aliquat 336 as the Carrier

School of Chemistry, The University of Melbourne, Victoria 3010, Australia
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Received: 1 January 2018 / Revised: 18 January 2018 / Accepted: 22 January 2018 / Published: 25 January 2018
(This article belongs to the Special Issue Advances in Liquid Membrane-Based Separation)
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Abstract

Clusters of gold nanoparticles (AuNPs) formed on the surface of PVC-based polymer inclusion membranes (PIMs) with a liquid phase containing Aliquat 336 as the carrier and in some cases 1-dodecanol or 2-nitrophenol octyl ether as plasticizers were found to inhibit the extraction of nitrate by the PIMs. This observation was based on gradually increasing the mass of AuNPs on the membrane surface and testing the ability of the membrane to extract nitrate after each increase. In this way, it was possible to determine the so-called “critical AuNP masses” at which the studied membranes ceased to extract nitrate. On the basis of these results, it can be hypothesized that the surfaces of these PIMs are not homogeneous with respect to the distribution of their membrane liquid phases, which are present only at certain sites. Extraction takes place only at these sites, and at the “critical AuNP mass” of a PIM, all these extraction sites are blocked and the membrane loses its ability to extract. View Full-Text
Keywords: polymer inclusion membrane (PIM); gold nanoparticles (AuNPs); surface morphology; Aliquat 336; nitrate extraction polymer inclusion membrane (PIM); gold nanoparticles (AuNPs); surface morphology; Aliquat 336; nitrate extraction
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Bonggotgetsakul, Y.Y.N.; Cattrall, R.W.; Kolev, S.D. The Effect of Surface Confined Gold Nanoparticles in Blocking the Extraction of Nitrate by PVC-Based Polymer Inclusion Membranes Containing Aliquat 336 as the Carrier. Membranes 2018, 8, 6.

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