Mechanical characterization of polypropylene reinforced poly(vinyl alcohol) hydrogels for fibrocartilage replacement

Julianne L. Holloway, Anthony M. Lowman, Giuseppe R. Palmese

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Poly(vinyl alcohol) (PVA) based hydrogels are ideal for biomaterial applications in that they allow for the formation of physical cross-links during freeze-thaw cycling without any need for possibly toxic monomers. PVA hydrogels have been investigated extensively for articular cartilage applications due to their ability to mimic human tissue. Poor properties in tension, however, limit the actual use of this material. In this study, poly(vinyl alcohol) (PVA) hydrogels were reinforced with polypropylene (PP) fibers and evaluated as possible fibrocartilage replacements. An investigation of hydrogel and composite mechanical properties indicates PP-reinforced PVA hydrogels could replicate the radial modulus present in the native meniscus; the most commonly damaged orthopedic tissue. More specifically, fibrous reinforcement successfully increased the tensile modulus of the biomaterial from 0.25 MPa without any reinforcement to 8 MPa at 10 vol% PP. Additionally, the molecular weight between cross-links and microstructure of the PVA hydrogels were evaluated as a function of freeze-thaw cycles to lend insight into the processes occurring during synthesis. These results suggest the presence of multiple mechanisms as possible causes for increasing hydrogel modulus with freeze-thaw cycling.

Original languageEnglish (US)
Title of host publicationSAMPE 2010 Conference and Exhibition "New Materials and Processes for a New Economy"
StatePublished - Dec 2 2010
Externally publishedYes
EventSAMPE 2010 Conference and Exhibition "New Materials and Processes for a New Economy" - Seattle, WA, United States
Duration: May 17 2010May 20 2010

Publication series

NameInternational SAMPE Symposium and Exhibition (Proceedings)
ISSN (Print)0891-0138

Other

OtherSAMPE 2010 Conference and Exhibition "New Materials and Processes for a New Economy"
CountryUnited States
CitySeattle, WA
Period5/17/105/20/10

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ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Holloway, J. L., Lowman, A. M., & Palmese, G. R. (2010). Mechanical characterization of polypropylene reinforced poly(vinyl alcohol) hydrogels for fibrocartilage replacement. In SAMPE 2010 Conference and Exhibition "New Materials and Processes for a New Economy" (International SAMPE Symposium and Exhibition (Proceedings)).