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Hierarchically Porous Materials from Layer‐by‐Layer Photopolymerization of High Internal Phase Emulsions
Author(s) -
Sušec Maja,
Ligon Samuel Clark,
Stampfl Jürgen,
Liska Robert,
Krajnc Peter
Publication year - 2013
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201300016
Subject(s) - materials science , porosity , photopolymer , acrylate , emulsion , stereolithography , polymer , curing (chemistry) , layer (electronics) , composite material , chemical engineering , uv curing , phase (matter) , porous medium , embossing , copolymer , organic chemistry , polymerization , chemistry , engineering
A combination of high internal phase emulsion (HIPE) templating and additive manufacturing technology (AMT) is applied for creating hierarchical porosity within an acrylate and acrylate/thiol‐based polymer network. The photopolymerizable formulation is optimized to produce emulsions with a volume fraction of droplet phase greater than 80 vol%. Kinetic stability of the emulsions is sufficient enough to withstand in‐mold curing or computer‐controlled layer‐by‐layer stereolithography without phase separation. By including macroscale cellular cavities within the build file, a level of controlled porosity is created simultaneous to the formation of the porous microstructure of the polyHIPE. The hybrid HIPE–AMT technique thus provides hierarchically porous materials with mechanical properties tailored by the addition of thiol chain transfer agent.