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A Tubular Biomaterial Construct Exhibiting a Negative Poisson’s Ratio

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  • Jin Woo Lee
  • Pranav Soman
  • Jeong Hun Park
  • Shaochen Chen
  • Dong-Woo Cho

Abstract

Developing functional small-diameter vascular grafts is an important objective in tissue engineering research. In this study, we address the problem of compliance mismatch by designing and developing a 3D tubular construct that has a negative Poisson’s ratio νxy (NPR). NPR constructs have the unique ability to expand transversely when pulled axially, thereby resulting in a highly-compliant tubular construct. In this work, we used projection stereolithography to 3D-print a planar NPR sheet composed of photosensitive poly(ethylene) glycol diacrylate biomaterial. We used a step-lithography exposure and a stitch process to scale up the projection printing process, and used the cut-missing rib unit design to develop a centimeter-scale NPR sheet, which was rolled up to form a tubular construct. The constructs had Poisson’s ratios of -0.6 ≤ νxy ≤ -0.1. The NPR construct also supports higher cellular adhesion than does the construct that has positive νxy. Our NPR design offers a significant advance in the development of highly-compliant vascular grafts.

Suggested Citation

  • Jin Woo Lee & Pranav Soman & Jeong Hun Park & Shaochen Chen & Dong-Woo Cho, 2016. "A Tubular Biomaterial Construct Exhibiting a Negative Poisson’s Ratio," PLOS ONE, Public Library of Science, vol. 11(5), pages 1-14, May.
    • Handle: RePEc:plo:pone00:0155681
    DOI: 10.1371/journal.pone.0155681
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