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One-step breaking and separating emulsion by tungsten oxide coated mesh.

Xin Lin1, Fei Lu1, Yuning Chen1

  • 1Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China.

ACS Applied Materials & Interfaces
|March 11, 2015
PubMed
Summary

A novel tungsten oxide coated mesh, featuring a unique micro/nano structure, efficiently separates oil/water mixtures and emulsions in a single step. This innovative material offers a promising solution for industrial water treatment and petroleum refining applications.

Keywords:
emulsion separationin-air superhydrophilic and underwater superoleophobicmicro/nanostructureoil/water separationone-step processtungsten oxide

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Environmental Engineering

Background:

  • Separating oil/water mixtures and emulsions is crucial for industrial processes.
  • Existing methods often require multiple steps and post-treatment.
  • Developing efficient, single-step separation materials is a key challenge.

Purpose of the Study:

  • To fabricate a tungsten oxide coated mesh with special wettability for oil/water separation.
  • To investigate the structure-property relationship of the coated mesh.
  • To demonstrate its capability in single-step emulsion breaking and separation.

Main Methods:

  • Fabrication of tungsten oxide coated mesh using a simple and inexpensive method.
  • Characterization of the dual micro/nano surface structure (flower and acicular crystal).
  • Evaluation of wettability (superhydrophilic in air, superoleophobic under water).

Main Results:

  • The coated mesh exhibits a unique dual micro/nano hierarchical structure.
  • It demonstrates superhydrophilic and superoleophobic properties due to the structure and tungsten oxide's nature.
  • The mesh successfully separated oil/water mixtures and demulsified emulsions in a single step.

Conclusions:

  • The tungsten oxide coated mesh acts as an effective "emulsion breaker and separator".
  • Its special wettability and structural features enable efficient, single-step separation.
  • This technology holds significant potential for applications in water treatment and petroleum refining.