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Graphene Coatings for Biomedical Implants
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Polymer-Enriched 3D Graphene Foams for Biomedical Applications.

Jun Kit Wang1, Gordon Minru Xiong, Minmin Zhu2,3

  • 1†Residues and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore.

ACS Applied Materials & Interfaces
|March 31, 2015
PubMed
Summary

Polymer enrichment enhances graphene foams (GFs), improving flexibility and conductivity for biomedical uses. Polycaprolactone-enriched GFs show superior bone mineralization potential, advancing applications in bone defect treatments.

Keywords:
biomineralizationchemical vapor deposition (CVD)graphene foam (GF)poly(vinylidene fluoride) (PVDF)polycaprolactone (PCL)

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Materials Engineering

Background:

  • Graphene foams (GFs) offer excellent properties for biomedical applications.
  • Brittleness and inflexibility of pristine GFs limit their use.
  • Developing flexible and conductive GFs is crucial for advanced biomedical applications.

Purpose of the Study:

  • To synthesize polymer-enriched 3D graphene foams (GFs) with enhanced flexibility and conductivity.
  • To evaluate the impact of polymer enrichment on GFs' mechanical properties and electrical conductivity.
  • To assess the in vitro mineralization capability of polymer-enriched GFs for bone tissue engineering.

Main Methods:

  • Chemical vapor deposition (CVD) to synthesize 3D GFs.
  • Spin-coating GFs with poly(vinylidene fluoride) (PVDF) and polycaprolactone (PCL).
  • Assessing flexibility, conductivity, and calcium phosphate (Ca-P) formation in simulated body fluid.

Main Results:

  • Polymer-enriched GFs (PVDF/GF and PCL/GF) exhibited improved flexibility and handleability compared to pristine GFs.
  • Polymer enrichment maintained high electrical conductivity due to microcrack-mediated electron flow.
  • PCL/GF demonstrated a higher in vitro mineralization nucleation rate due to favorable functional groups for Ca-P deposition.

Conclusions:

  • Polymer enrichment successfully enhances graphene foam properties for biomedical applications.
  • PCL-enriched GFs show significant potential for bone tissue engineering due to enhanced mineralization.
  • These findings pave the way for advanced 3D graphene foam applications in treating bone defects and other biomedical fields.