Preparation and Characterization of Triple Shape Memory Composite Foams † Hossein Birjandi, Nejad, Richard M. Baker and Patrick T. Mather* Electronic Supplementary Information (ESI) Stirred for 20 min at 75 °C DGEBA, NGDE and PCL JD230 added Stirred for 3 min at RT Cure at RT for 1 day- at 40 °C for 3 days The blend diffused to the template Poured onto an interconnected template Immersed in DI water at 40 °C for 48 h and dried under vacuum (A) (B) (C) (D) (E) (F) (G) 100 µm Scheme S1. Step-by-step illustration for preparing the triple shape memory composites. Epoxy monomers and PCL were first mixed at 75 °C for 20 min until a clear, homogenous blends was achieved (A). Then the blend was cooled down to room temperature (RT) after which the crosslinker (JD230) was added (B). The blend was mixed again for another 2-3 min. The product, a low viscosity blend was then poured into a salt template (C) and was kept at ambient for 10 min followed by pulling vacuum at 760 mm.Hg for an additional 10 min in to allow the blend to completely diffuse into the salt template and replace the air. The product was then cured at RT for 24 h followed by curing at 40 °C for 3 days after which the salt was distracted. After drying, the product was a porous interconnected foam (G). Figure S1. SEM micrographs of NaCl templates used to fabricate the foams. To improve pore interconnectivity, salt was fused prior to polymer synthesis, as we now describe. About 6 g of salt with 150-300 μm diameter was added to a 20 high density polyethylene (HDPE) vial. The was then placed in a Styrofoam box (9.25 x 6.25 x 8.25 in) with the lid off in which a 2 L water at 40 °C was placed to provide a humidity saturated environment. The salt was kept in Styrofoam for 24 h during which the humidity of this chamber facilitates the fusion of the salt. The salt was then dried under vacuum at 760 mm.Hg for 24 h. Dashed lines represent some of the regions where salt crystals were welded together. Electronic Supplementary Material (ESI) for Soft Matter. This journal is © The Royal Society of Chemistry 2014