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Multimaterial 4D Printing with Tailorable Shape Memory Polymers

Scientific reports, 2016-08, Vol.6 (1), p.31110-31110, Article 31110 [Peer Reviewed Journal]

Copyright Nature Publishing Group Aug 2016 ;Copyright © 2016, The Author(s) 2016 The Author(s) ;ISSN: 2045-2322 ;EISSN: 2045-2322 ;DOI: 10.1038/srep31110 ;PMID: 27499417

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  • Title:
    Multimaterial 4D Printing with Tailorable Shape Memory Polymers
  • Author: Ge, Qi ; Sakhaei, Amir Hosein ; Lee, Howon ; Dunn, Conner K ; Fang, Nicholas X ; Dunn, Martin L
  • Subjects: Alloys ; Computer applications ; Fidelity ; Glass ; Memory ; Polymers ; Printing ; Temperature effects
  • Is Part Of: Scientific reports, 2016-08, Vol.6 (1), p.31110-31110, Article 31110
  • Description: We present a new 4D printing approach that can create high resolution (up to a few microns), multimaterial shape memory polymer (SMP) architectures. The approach is based on high resolution projection microstereolithography (PμSL) and uses a family of photo-curable methacrylate based copolymer networks. We designed the constituents and compositions to exhibit desired thermomechanical behavior (including rubbery modulus, glass transition temperature and failure strain which is more than 300% and larger than any existing printable materials) to enable controlled shape memory behavior. We used a high resolution, high contrast digital micro display to ensure high resolution of photo-curing methacrylate based SMPs that requires higher exposure energy than more common acrylate based polymers. An automated material exchange process enables the manufacture of 3D composite architectures from multiple photo-curable SMPs. In order to understand the behavior of the 3D composite microarchitectures, we carry out high fidelity computational simulations of their complex nonlinear, time-dependent behavior and study important design considerations including local deformation, shape fixity and free recovery rate. Simulations are in good agreement with experiments for a series of single and multimaterial components and can be used to facilitate the design of SMP 3D structures.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2045-2322
    EISSN: 2045-2322
    DOI: 10.1038/srep31110
    PMID: 27499417
  • Source: PubMed Central
    ProQuest Central
    DOAJ Directory of Open Access Journals
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