Special Issue "Effects of Polymer Coatings on Toxicity of Nanomaterials"

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A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (31 December 2015)

Special Issue Editor

Guest Editor
Prof. Dr. Edward P. C. Lai (Website)

Department of Chemistry, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada
Phone: +1-613-520-2600
Interests: analytical chemistry; capillary electrophoresis; coatings; colloids; dynamic light scattering; fluorescence spectroscopy; molecular imprinting; nanoparticles: polymers; toxicity

Special Issue Information

Dear Colleague,

Over the past several years we have witnessed an exponential growth in the production of novel nanomaterials. The enormous demand for technological solutions by major manufacturing industries presents a strong driving force in the search for more advanced nanomaterials. Research and development efforts in the field seem to focus on the discovery of new physical and chemical properties among modern nanomaterials. One punctilious challenge is the need to make sure that these nanomaterials are environmentally friendly. Biocompatible polymer coatings can reduce the toxicity of nanoparticles [1], coating of silver nanoparticles with a biodegradable polymer can prevent toxicity [2], and carbon nanotubes can be coated by spontaneous oxidative polymerization of dopamine [3]. One of my research interests is to coat silica, titania and other metal oxide nanoparticles with polydopamine. Photolytic generation of activated oxygen is being investigated to accelerate the oxidative polymerization. More possibilities will be derived from the spontaneous polymerization of aniline, thiophene, pyrrole and phenols.

This special issue aims to encourage worldwide researchers in sharing their scientific and technological knowledge on new polymer coatings of low toxicity and facile formation. It may include novel synthetic routes for coating nanomaterials with proper biocompatible polymers, strategies for rapid formation of thick polymeric films, and instrumental methods for characterization of their unique physicochemical properties. Special welcomes will be extended to emerging technologies that are best suited for coating a variety of nanomaterials and biocompatible polymers that can be applied in very large volumes of environmental water.

[1] Choi et al. Nat. Nanotechnol. 2010, 5, 42–47.
[2] Lu et al. Chem. Phys. Lett. 2010, 487, doi:10.1016/j.cplett.2010.01.027.
[3] Fei et al. Carbon 2008, 46, 1795–1797.

Prof. Dr. Edward P. C. Lai
Guest Editor

Keywords

  • coatings
  • environmental
  • nanomaterials
  • polymers
  • spontaneous
  • toxicity

Published Papers (1 paper)

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Research

Open AccessArticle Polymerization of Vinylpyrrolidone to Form a Neutral Coating on Anionic Nanomaterials in Aqueous Suspension for Rapid Sedimentation
Coatings 2014, 4(2), 340-355; doi:10.3390/coatings4020340
Received: 7 February 2014 / Revised: 29 April 2014 / Accepted: 9 May 2014 / Published: 20 May 2014
PDF Full-text (660 KB) | HTML Full-text | XML Full-text
Abstract
Nanomaterials in water present an array of identifiable potential hazards to ecological and human health. There is no general consensus about the influence of anionic or cationic charge on the toxicity of nanomaterials on environmental ecology. One challenge is the limited number [...] Read more.
Nanomaterials in water present an array of identifiable potential hazards to ecological and human health. There is no general consensus about the influence of anionic or cationic charge on the toxicity of nanomaterials on environmental ecology. One challenge is the limited number of scalable technologies available for the removal of charged nanomaterials from water. A new method based on polymer coating has been developed in our laboratory for rapid sedimentation of nanomaterials in aqueous suspension. Using colloidal silica as a model inorganic oxide, coating of polyvinylpyrrolidone (PVP) around the SiO2 nanoparticles produced SiO2@PVP particles, as indicated by a linear increase of nephelometric turbidity. Purification of the water sample was afforded by total sedimentation of SiO2@PVP particles when left for 24 h. Characterization by capillary electrophoresis (CE) revealed nearly zero ionic charge on the particles. Further coating of polydopamine (PDA) around those particles in aqueous suspension produced an intense dark color due to the formation of SiO2@PVP@PDA. The SiO2@PVP@PDA peak appeared at a characteristic migration time of 4.2 min that allowed for quantitative CE-UV analysis to determine the original SiO2 concentration with enhanced sensitivity and without any ambiguous identity. Full article
(This article belongs to the Special Issue Effects of Polymer Coatings on Toxicity of Nanomaterials)

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