Preparation and characterization of triple shape memory composite foams

Hossein Birjandi Nejad, Richard M. Baker, Patrick T. Mather

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Foams prepared from shape memory polymers (SMPs) offer the potential for low density materials that can be triggered to deploy with a large volume change, unlike their solid counterparts that do so at near-constant volume. While examples of shape memory foams have been reported in the past, they have been limited to dual SMPs: those polymers featuring one switching transition between an arbitrarily programmed shape and a single permanent shape established by constituent crosslinks. Meanwhile, advances by SMP researchers have led to several approaches toward triple- or multi-shape polymers that feature more than one switching phase and thus a multitude of temporary shapes allowing for a complex sequence of shape deployments. Here, we report the design, preparation, and characterization of a triple shape memory polymeric foam that is open cell in nature and features a two phase, crosslinked SMP with a glass transition temperature of one phase at a temperature lower than a melting transition of the second phase. The soft materials were observed to feature high fidelity, repeatable triple shape behavior, characterized in compression and demonstrated for complex deployment by fixing a combination of foam compression and bending. We further explored the wettability of the foams, revealing composition-dependent behavior favorable for future work in biomedical investigations. This journal is

Original languageEnglish (US)
Pages (from-to)8066-8074
Number of pages9
JournalSoft Matter
Volume10
Issue number40
DOIs
StatePublished - Oct 28 2014

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ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

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