Next Article in Journal
Gold Plate Electrodes Functionalized by Multiwall Carbon Nanotube Film for Potentiometric Thallium(I) Detection
Previous Article in Journal
Stability of Hybrid Organic-Inorganic Perovskite CH3NH3PbBr3 Nanocrystals under Co-Stresses of UV Light Illumination and Temperature
Previous Article in Special Issue
Photo-Fenton Degradation of Pentachlorophenol: Competition between Additives and Photolysis
Article Menu

Export Article

Open AccessArticle

Fabrication and Surface Interactions of Super-Hydrophobic Silicon Carbide for Membrane Distillation

1
Center for Membrane Technology, Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg Øst, Denmark
2
Dipartimento di Chimica, Universitá di Torino, Via P. Giuria 7, 10125 Torino, Italy
3
NIS Interdepartmental Center, Universitá di Torino, Via P. Giuria 7, 10125 Torino, Italy
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(8), 1159; https://doi.org/10.3390/nano9081159
Received: 22 June 2019 / Revised: 29 July 2019 / Accepted: 7 August 2019 / Published: 13 August 2019
(This article belongs to the Special Issue Sustainable and Safe Nano-Enabled Water Treatment Applications)
  |  
PDF [3358 KB, uploaded 13 August 2019]
  |  

Abstract

Hydrophilic silicon carbide was modified by surface deposition of a super-hydrophobic coating that is based on perfluorosilanes. The modification was proven to yield membrane surfaces with contact angles that were higher than 145° and to be stable under hydrothermal conditions. The measurement of the isosteric heat of adsorption of water and toluene by microgravimetry showed that, after modification, the membrane material was fully covered by a low-energy surface, which is consistent with the fluorocarbon moieties that were introduced by the modification. The same modification method was applied to a commercial multichannel SiC membrane tube (nominal pore size = 0.04 µm), which was tested in a direct contact membrane distillation apparatus. The membrane was permeable to water vapour and volatiles, but it showed full rejection for salt ions and organic pollutants with low vapour pressure (such as ibuprofen and caffeine). Moreover, the membrane was reusable, and its performances were stable with no sign of pore wetting over 8 h of filtration. View Full-Text
Keywords: isosteric heat; low-energy surface; fluorocarbon; desalination; water detoxification isosteric heat; low-energy surface; fluorocarbon; desalination; water detoxification
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Boffa, V.; Lunghi, C.; Quist-Jensen, C.A.; Magnacca, G.; Calza, P. Fabrication and Surface Interactions of Super-Hydrophobic Silicon Carbide for Membrane Distillation. Nanomaterials 2019, 9, 1159.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Nanomaterials EISSN 2079-4991 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top