Hydrophobic meshes for oil spill recovery devices

Da Deng, Daniel P. Prendergast, John MacFarlane, Roberto Bagatin, Francesco Stellacci, Philip M. Gschwend

Research output: Contribution to journalArticlepeer-review

Abstract

Widespread use of petrochemicals often leads to accidental releases in aquatic environments, occasionally with disastrous results. We have developed a hydrophobic and oleophilic mesh that separates oil from water continuously in situ via capillary action, providing a means of recovering spilt oil from surface waters. Steel mesh is dip-coated in a xylene solution of low-density polyethylene, creating a hydrophobic surface with tunable roughness and opening size. The hydrophobic mesh allows oil to pass through the openings while preventing the concomitant passage of water. A bench-top prototype demonstrated the efficacy of such an oil recovery device and allowed us to quantify the factors governing the ability of the mesh to separate oil and water. Preliminary data analysis suggested that the oleophilic openings behave somewhat like capillary tubes: the oil flux is inversely proportional to oil viscosity, and directly proportional to the size of the mesh openings. An unpinned meniscus model was found to predict the water intrusion pressure successfully, which increased as the opening size decreased. The trade-off between water intrusion and oil flow rate suggests an optimal pore size for given oil properties and sea conditions.

Original languageEnglish
Pages (from-to)774-781
Number of pages8
JournalACS Applied Materials and Interfaces
Volume5
Issue number3
DOIs
Publication statusPublished - Feb 13 2013

Keywords

  • functionalized mesh
  • hydrophobic
  • low-density polyethylene (LDPE)
  • oil spill remediation
  • oleophilic
  • separation

ASJC Scopus subject areas

  • Materials Science(all)

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