LIQUID MARBLES GRANULATED USING SUPER-HYDROPHOBIC METAL POWDERS

Yu Chen Sang, Chirangano Mangwandi, Steven Bell, Gavin Walker

Research output: Contribution to conferencePaper

Abstract

Superhydrophobic (SH) particles based on a copper substrate were prepared by a silver deposition technique of different particle sizes from 10µm to 425µm. Such SH particles were found to be pH-responsive and liquid marbles formed using the SH copper substrate destabilised under certain pH conditions. The exposure to high concentrations of acidic or basic gases caused immediate collapse of the liquid marble. However, low concentrations of acidic and basic gases could diffuse across the shell of liquid marbles without adversely affecting the structure. Liquid marbles formed with large SH particles (425
µm) did not fully form a mono-layer around the liquid droplet. This phenomenon, whereby SH particles slide down the surface of the water droplet until an equilibrium position is reached, was studied using a mathematical approach, which related the angle to the vertical axis of the SH particles at t
he equilibrium F, to the shape of liquid marble and the contact angle, ?.
Original languageEnglish
Publication statusPublished - 25 Jun 2013
Event6th International Granulation Workshop - Sheffield, United Kingdom
Duration: 25 Jul 201228 Jul 2012

Conference

Conference6th International Granulation Workshop
CountryUnited Kingdom
CitySheffield
Period25/07/201228/07/2012

Keywords

  • liquid marbles
  • hydrophobic
  • contact angle
  • granulation
  • micro reactor

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