Multi-trigger shape memory polymer nanocomposite

John Carrell, Hong Chao Zhang, Shiren Wang, Derrick Tate

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Shape memory polymers (SMPs) have a special functional ability to recover trained deformation upon a single trigger. This single trigger can be a hindrance in many applications where ambient conditions could cause accidental triggering. A means to regulate the possibility of accidental triggering would be by the addition of another trigger. The focus in this research was thus to investigate a means for a multiple trigger mechanism with a SMP nanocomposite. A commercially available shape memory polyurethane (SMPU) was filled with varying proportions (7.88 wt.%, 15.00 wt.%, and 21.29 wt.%) of magnetite nanoparticles and tested by thermomechanical methods, derived thermo-magnetic-mechanical methods, and shape memory methods. Current processing and testing provide results of an ability of the SMP nanocomposite to be controlled in shape deformation and recovery with both thermal and magnetic triggers. Furthermore, with the addition of the magnetite to the polymer matrix showed increases in material properties (i.e. tensile strength, modulus, and thermal conductivity) with proportional increase in magnetite filler content. Changes in basic shape memory properties (i.e. shape fixity and shape recovery) were seen to be minimal with the magnetite filler content and are slightly lower than the pure SMPU in accordance with the increasing amount of filler material. Overall, the produced SMP nanocomposite assumes to provide an interesting alternative to current SMPs with the ability to be triggered by both a thermal and magnetic field.

Original languageEnglish
Title of host publicationSAMPE Tech 2011 Conference and Exhibition
Subtitle of host publicationDeveloping Scalable Materials and Processes for Our Future
StatePublished - 2011
EventSAMPE Tech 2011 Conference and Exhibition: Developing Scalable Materials and Processes for Our Future - Fort Worth, TX, United States
Duration: Oct 17 2011Oct 20 2011

Publication series

NameInternational SAMPE Technical Conference


ConferenceSAMPE Tech 2011 Conference and Exhibition: Developing Scalable Materials and Processes for Our Future
Country/TerritoryUnited States
CityFort Worth, TX


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