Fabrication and morphology control of electrospun poly(γ-glutamic acid) nanofibers for biomedical applications

Shige Wang, Xueyan Cao, Mingwu Shen, Rui Guo, István Bányai, Xiangyang Shi

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We report the fabrication of water-stable electrospun γ-polyglutamic acid (γ-PGA) nanofibers with morphology control for biomedical applications. In this study, the processing variables including polymer concentration, flow rate, applied voltage, collection distance, and ambient humidity were systematically optimized to generate uniform γ-PGA nanofibers with a smooth morphology. By changing the trifluoroacetic acid concentration in the electrospinning solution, the diameter of the γ-PGA nanofibers can be controlled within the range of 186-603. nm. To render the γ-PGA nanofibers with good water stability, cystamine was employed as a crosslinking agent to amidate the carboxyl groups of γ-PGA. Furthermore, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide colorimetric assay in conjunction of cell morphology observation reveals that the obtained γ-PGA nanofibers have an excellent biocompatibility to promote the cell adhesion and proliferation. We anticipate that the fabricated electrospun γ-PGA nanofibers with controllable morphology and good water stability may find extensive applications in future development of tissue engineering scaffold materials, drug delivery systems, environmental remediation, and sensing.

Original languageEnglish
Pages (from-to)254-264
Number of pages11
JournalColloids and Surfaces B: Biointerfaces
Issue number1
Publication statusPublished - Jan 1 2012



  • Biocompatibility
  • Electrospinning
  • Morphology control
  • Nanofibers
  • Poly(γ-glutamic acid)
  • Water stability

ASJC Scopus subject areas

  • Biotechnology
  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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