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Accepted (AM)Open Access (License Unspecified), Open
Journal article
Three-Dimensional Polymer Constructs Exhibiting a Tunable Negative Poisson's Ratio
Advanced functional materials, v 21(14), pp 2712-2720
22 Jul 2011
PMID: 21841943
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Young's modulus and Poisson's ratio of a porous polymeric construct (scaffold) quantitatively describe how it supports and transmits external stresses to its surroundings. While Young's modulus is always non-negative and highly tunable in magnitude, Poisson's ratio can, indeed, take on negative values despite the fact that it is non-negative for virtually every naturally occurring and artificial material. In some applications, a construct having a tunable negative Poisson's ratio (an auxetic construct) may be more suitable for supporting the external forces imposed upon it by its environment. Here, three-dimensional polyethylene glycol scaffolds with tunable negative Poisson's ratios are fabricated. Digital micromirror device projection printing (DMD-PP) is used to print single-layer constructs composed of cellular structures (pores) with special geometries, arrangements, and deformation mechanisms. The presence of the unit-cellular structures tunes the magnitude and polarity (positive or negative) of Poisson's ratio. Multilayer constructs are fabricated with DMD-PP by stacking the single-layer constructs with alternating layers of vertical connecting posts. The Poisson's ratios of the single- and multilayer constructs are determined from strain experiments, which show (1) that the Poisson's ratios of the constructs are accurately predicted by analytical deformation models and (2) that no slipping occurrs between layers in the multilayer constructs and the addition of new layers does not affect Poisson's ratio.
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Details
- Title
- Three-Dimensional Polymer Constructs Exhibiting a Tunable Negative Poisson's Ratio
- Creators
- David Y. Fozdar - The University of Texas at AustinPranav Soman - University of California San DiegoJin Woo Lee - Univ Calif San Diego, Dept NanoEngn, La Jolla, CA 92093 USALi-Hsin Han - Stanford UniversityShaochen Chen - University of California San Diego
- Publication Details
- Advanced functional materials, v 21(14), pp 2712-2720
- Publisher
- Wiley
- Number of pages
- 9
- Grant note
- R01EB012597 / National Institute of Biomedical Imaging And Bioengineering; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Biomedical Imaging & Bioengineering (NIBIB)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics; Drexel University
- Web of Science ID
- WOS:000293715800013
- Scopus ID
- 2-s2.0-79960514293
- Other Identifier
- 991020100182404721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter