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Competitive migration of proteins within droplets and particles during spray drying


The objectives of this project are to assess what types of proteins are most effective as encapsulating materials for spray-dried sticky materials such as sugars and how and why the dryers can best be operated to give the greatest encapsulation effectiveness.


Professor Timothy Langrish.

Research location

Chemical and Biomolecular Engineering

Program type



Proteins have recently been discovered by us and co-workers to be very effective encapsulants at very low concentrations (less than 1%) compared with existing materials, such as maltodextrins, which must be used at concentrations of up to 50% when producing spray-dried honey.Key aspects of scientific significance for this project include:

  1. Developing a distributed-parameter particulate drying model to account for the formation of the non-sticky protein layer on the particle surfaces;
  2. Measuring the multi-component diffusion coefficients of ternary protein-sugar-water systems;
  3. Assessing how the different surface activities of various proteins affect the extent of protein surface coverage and therefore selecting the most appropriate proteins for encapsulation.

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Opportunity ID

The opportunity ID for this research opportunity is 305

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