Project TitleA Method for Encapsulation of Nanoparticles in Ionic Crystals
Track Code65679
Short Description

Steven Son

Steven Son Research Group

Purdue Mechanical Engineering

Purdue Aeronautics and Astronautics

Tagschemical engineering, Chemistry and Chemical Analysis, crystallization, nanoparticles, polymers
Posted DateOct 4, 2017 12:58 PM


Steven Son
David Reese
Allen Yan

A Method for Encapsulation of Nanoparticles in Ionic Crystals


Previously, Purdue University researchers developed a process for preparing ultrafine ammonium perchlorate particles in which an aqueous solution of ammonium perchlorate was dispersed in an organic liquid for a water-in-oil emulsion. The emulsion is frozen and freeze dried to produce ultrafine particles. However, nanometric materials have not been widely accepted in some industries given their extremely small size presents significant challenges in such areas as handling, dispersion, safety, and ultimate strength.

Technology Summary

Researchers at Purdue University have developed technology to mitigate these concerns by containing the nanomaterial inside micron-sized particles, allowing even dispersion and removing the influence of the nanoscale particle surface area on the polymeric binder, while still maintaining intimate contact between fuel and oxidizer particles. Therefore, this method retains the performance increase provided by nanoparticles. In addition, improved performance over current methods is expected as diffusional length scales for combustion will be decreased significantly, reducing the tendency for agglomeration and increasing efficiency.


  • Alleviate concerns caused by agglomerate and high surface area
  • Removes the influence of the nanoscale particle surface area on the polymeric binder
  • Retain performance increase provided by nanoparticles

Potential Applications

  • Inclusion of nanoparticles in propellants
  • Composite structures, cosmetics, pharmaceuticals, and energetic materials

Stage of Development

Concept developed

Web Links

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File Name Description
65679.03_2016_12_13_Issued Patent No. 9517361.pdf None Download

Intellectual Property

Patent Number Issue Date Type Country of Filing
9,517,361 Dec 13, 2016 Utility United States