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Article | REF: J2210 V2

Microencapsulation

Authors: Jean-Pierre BENOÎT, Joël RICHARD, Marie-Claire VENIER-JULIENNE

Publication date: June 10, 2013, Review date: November 29, 2018

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2. Physical-chemical processes

2.1 Process based on phase separation

The term coacervation describes the phenomenon of desolvation of macromolecules, leading to phase separation within a solution. Any factor tending to reduce the solvation of a polymer by affecting the properties of the solvent or the charge of the macromolecule will induce this phenomenon. At the end of coacervation, two phases are present in the medium:

  • one rich in polymer and poor in solvent, coacervat ;

  • a polymer-poor, solvent-rich supernatant.

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