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Non-aqueous Isorefractive Pickering Emulsions.

Kate L Thompson1, Jacob A Lane1, Matthew J Derry1

  • 1Department of Chemistry, Dainton Building, University of Sheffield, Brook Hill, Sheffield, United Kingdom S3 7HF.

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|April 7, 2015
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Summary
This summary is machine-generated.

Researchers created transparent non-aqueous Pickering emulsions using diblock copolymer worms. These emulsions, with ethylene glycol droplets in n-alkanes, offer tunable transparency and droplet size by adjusting copolymer concentration.

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Area of Science:

  • Colloid and Surface Science
  • Materials Science
  • Polymer Chemistry

Background:

  • Non-aqueous Pickering emulsions offer unique properties compared to conventional emulsions.
  • Diblock copolymer worms have shown potential as stabilizers for such systems.
  • Controlling emulsion turbidity and droplet size is crucial for various applications.

Purpose of the Study:

  • To prepare and characterize non-aqueous Pickering emulsions using diblock copolymer worms.
  • To investigate the effect of refractive index matching on emulsion properties.
  • To demonstrate the tunability of droplet diameter and transparency.

Main Methods:

  • Preparation of non-aqueous Pickering emulsions using diblock copolymer worms.
  • Utilizing ethylene glycol as the droplet phase and n-alkanes (n-dodecane, n-tetradecane) as the continuous phase.
  • Systematic variation of worm copolymer concentration to control emulsion characteristics.

Main Results:

  • Stable non-aqueous Pickering emulsions with droplet diameters of 16-240 micrometers were successfully prepared.
  • Emulsions using n-dodecane showed reduced turbidity compared to conventional water-in-oil emulsions.
  • Almost isorefractive emulsions were achieved using n-tetradecane, significantly enhancing transparency.
  • Droplet diameter and transparency were systematically controlled by adjusting copolymer concentration.

Conclusions:

  • Diblock copolymer worms are effective stabilizers for non-aqueous Pickering emulsions.
  • Refractive index matching is a key strategy for achieving highly transparent Pickering emulsions.
  • The developed system offers a versatile platform for creating tunable, transparent non-aqueous emulsions.