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hydrophilic solids, granules, powder


Application Areas

Encapsulation: Chemicals are preserved and isolated when encapsulated with AEP hydrophilic polymers. On exposure to water the encapsulated material(s) are activated. The rate and amount of chemical species released is controlled by the surrounding polymer.

Membranes: AEP medium and high water compounds are electrically conductive when ions are in solution and also act as osmotic membranes.

Features of AEP Compounds
  • Biologically benign
  • Cross linked for chemical stability
  • Variable formulations for tailored properties
  • Dessicating preservative
  • Wide choice of absorption capacities
  • Wide choice of absorption rates
  • Stable and consistent from pH 1 to pH 14 inclusive
  • Stable and consistent in distilled water and saline to 20+% NaCl
  • High temperature stability to 180+ deg C
  • Permeable to ions in solution and soluble organics
  • Speed and rate of elution of solutes is adjustable
  • Transparent or coloured
  • Selective absorption of polar liquids:


2007 Andrews Wright Ltd

A major application is in the encapsulation of dry chemicals powders. The chemical is preserved and stable until activated by the presence of water or selected polar solvent.

The rate of release of the chemical is determined by the rate of diffusion throught the inert hydrophilic carrier; this is predetermined by the formulation and configuration of the AEP matrix.

In combination with electrically conductive solutions, AEP materials can form electrically conductive membranes. This has led to major developments in fuel cell technology.