Summary
The aim of this study was to prepare microcaspules containing a water-soluble dye used in textile industry. These microcapsules must be stable during the time and no release of the dye must be observed during their stocking. The difficulty of this work lies in the water-solubility of the dye which does not allow a classical oil-in-water solvent evaporation and furthermore, the dye presents a certain solubility with volatile solvents classically used in solvent evaporation technique. Thus a double emulsion based encapsulation process was developped and allowed the encapsulation of the dye. The observation by optical microscopy and scanning electron microscopy showed well-spherical microcapsules with mean diameter around 30 μm, smooth surface and no porous membrane.
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Received: 13 July 2001/Revised version: 23 October 2001/ Accepted: 23 October 2001
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Zydowicz, N., Nzimba-Ganyanad, E. & Zydowicz, N. PMMA microcapsules containing water-soluble dyes obtained by double emulsion/solvent evaporation technique. Polymer Bulletin 47, 457–463 (2002). https://doi.org/10.1007/s002890200009
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DOI: https://doi.org/10.1007/s002890200009