Journal of Colloid and Interface Science 516 (2018) 423–430 Contents lists available at ScienceDirect Journal of Colloid and Interface Science journal homepage: www.elsevier.com/locate/jcis Regular Article Choosing mineral ﬂotation collectors from large nanoparticle libraries Carla Abarca, M. Monsur Ali, Robert H. Pelton Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S4L8, Canada graphical a bstract article i nfo abstract Article history: Polystyrene nanoparticles can promote froth ﬂotation of mineral particles if the nanoparticles are sufﬁ- Received 5 November 2017 ciently hydrophobic and are colloidally stable in the high ionic strength solutions typical of commercial Revised 21 January 2018 ﬂotation operations. A library of 80 unique polystyrene nanoparticle types was prepared with click chem- Accepted 22 January 2018 istry and used to determine if particles that were sufﬁciently hydrophilic to be colloidally stable in high Available online 6 February 2018 ionic strength and high pH solutions, were also capable of promoting ﬂotation. The conﬂicting require- ments of colloidal stability and hydrophobicity can be achieved in 9 mM sodium carbonate, a very chal- Keywords: lenging environment. Instead of testing all 80 samples with laborious ﬂotation testing, automated assays Nanoparticle ﬂotation collectors measuring colloid stability and nanoparticle hydrophobicity were employed. The colloid stability
Journal of Colloid and Interface Science – Elsevier
Published: Apr 15, 2018
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