Abstract
Besides smart microcapsules with porous substrates and stimuli-responsive gates as described in Chapter 3, smart microcapsules can also be designed with the whole membranes consisting of stimuli-responsive smart hydrogels. In this chapter, the design, fabrication and performance of monodisperse smart microcapsules with thermo-responsive hydrogel membranes are introduced. For different application purposes, smart microcapsules with thermo-responsive PNIPAM hydrogel membranes are designed and fabricated with either water-in-oil (W/O) single emulsions, oil-in-water-in-oil (O/W/O) double emulsions, or water-in-oil-in-water-in-oil (W/O/W/O) triple emulsions as synthesis templates. The thermo-responsive PNIPAM hollow microcapsules, prepared with W/O single emulsions as templates, show reversible thermo-responsive swelling/shrinking volume phase transition behavior as the temperature changes across the lower critical solution temperature (LCST). The thermo-responsive PNIPAM hollow microcapsules, prepared with O/W/O double emulsions and W/O/W/O triple emulsions as templates, demonstrate thermo-induced burst squirting property for controlled release.
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© 2011 Zhejiang University Press, Hangzhou and Springer-Verlag Berlin Heidelberg
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Chu, LY. (2011). Smart Microcapsules with Thermo-Responsive Hydrogel Membranes. In: Smart Membrane Materials and Systems. Advanced Topics in Science and Technology in China. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-18114-6_4
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DOI: https://doi.org/10.1007/978-3-642-18114-6_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-18113-9
Online ISBN: 978-3-642-18114-6
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