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Author Spotlight: Asymmetric Field Flow Fractionation for Bioreactor Integration

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Multifunctional starch-based material for contaminated emulsions separation and purification.

Fan Zhang¹, Hui Chi², Chao Wang¹

¹Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; University of Science and Technology of China, Hefei 230026, PR China.

Carbohydrate Polymers

|July 23, 2021

Summary

A novel starch-based material efficiently separates stable water-in-oil emulsions. This easy-to-clean material offers high flux, reusability, and simultaneous removal of pollutants like dyes and heavy metals.

Keywords:

Dyes Heavy-metal and rare-earth ions Pickering emulsion polymerization Starch-based nanoparticles Water-in-oil emulsion

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Area of Science:

Materials Science
Environmental Engineering
Chemical Engineering

Background:

Stable water-in-oil (W/O) emulsions are common in industrial processes.
Existing separation materials suffer from significant fouling issues, limiting their practical application.

Purpose of the Study:

To develop a novel, easy-to-clean, multifunctional material for efficient separation and purification of W/O emulsions.
To address the fouling problem associated with conventional separation techniques.

Main Methods:

Fabrication of a hierarchical starch-based material with superoleophilic and under-oil superhydrophobic surfaces.
Testing the material's separation efficiency and flux for various W/O emulsions without external pressure.
Evaluating the material's reusability and its capacity for simultaneous pollutant removal.

Main Results:

The material achieved high separation efficiency and flux for diverse W/O emulsions.
No decrease in separation flux was observed over 10 reuse cycles after simple washing and drying.
Simultaneous removal of dyes, heavy metals, and rare-earth ions was demonstrated during the emulsion separation process.

Conclusions:

The developed starch-based material offers an effective and reusable solution for W/O emulsion separation.
Its multifunctional nature, including pollutant removal, highlights its potential for industrial wastewater treatment.
The material's unique wetting properties and hierarchical structure overcome limitations of traditional separation methods.