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Encapsulating Hydrophilic Solution by PU‐PMF Double‐Component Capsule Based on Water‐In‐Oil‐In‐Oil Emulsion Template
Author(s) -
Zheng Ting,
Pilla Srikanth
Publication year - 2018
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201700418
Subject(s) - emulsion , chemical engineering , polyurethane , materials science , aqueous solution , melamine resin , fabrication , aqueous two phase system , surface tension , polymer chemistry , polymer , chemistry , composite material , organic chemistry , medicine , alternative medicine , physics , pathology , quantum mechanics , engineering , coating
This study demonstrates an effective method to encapsulate a hydrophilic payload through the use of polyurethane‐poly(melamine‐formaldehyde) (PU‐PMF) dual‐component capsules based upon the water‐in‐oil‐in‐oil (W/O/O) emulsion template. This emulsion has a middle oil layer that hosts the PU (outer shell) forming reaction while the internal PMF skeleton, fabricated concurrently by polymer precipitation in the aqueous dispersive phase, provides additional mechanical support. The resultant capsules exhibit dense and spherical shape, low permeability, and diameter of ≈50 µm. Remarkably, interfacial tension is the driving factor in the formation of the W/O/O template. This microencapsulation system and the methods used for its fabrication have a great technical potential for use in industrial applications.