Direct-current treatment as a safe sterilization method for electrospun biodegradable polymer

Hye Lee Kim, Jeong Hyun Lee, Mi Hee Lee, Hak Hee Kim, Jungsung Kim, Inho Han, Bong Joo Park, Jeong Koo Kim, Dong Wook Han, Soo Hyun Kim, Seung Jin Lee, Jong Chul Park

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Sterilization is an essential process for biodegradable polymers to be used as biomaterials or tissue engineered- scaffolds. The characteristics of biodegradable scaffolds can change due to decomposition of constituent polymers due to high temperature, pressure, or moisture during sterilization. This study investigated direct-current (DC) treatment as a safe method that can prevent structural change and deformation. Treatment of electrospun poly (lactic-co-glycolic acid) (PLGA) with DC showed a bactericidal effect within 40 sec at 4 V. When DC was applied at 6 V to the electrospun PLGA, the bactericidal effect emerged within 30 sec. The morphology of fibers and molecular weight of PLGA polymer was maintained after DC treatment. In contrast, electrospun PLGA exposed to ethylene oxide showed fiber degradation, and gamma or e-beam irradiation resulted in decreased molecular weight. The demonstrated improvement in chemical and physical stability of biodegradable polymers after DC sterilization may help extend their application.

Original languageEnglish
Pages (from-to)320-325
Number of pages6
JournalTissue Engineering and Regenerative Medicine
Issue number3
StatePublished - May 2011


  • Biodegradable polymer
  • Direct-current
  • Electrospinning
  • Poly(lactic-co-glycolic acid)
  • Sterilization


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