Improving biocatalytic activity of enzyme-loaded nanofibers by dispersing entangled nanofiber structure

Sujith Nair, Jungbae Kim, Brad Crawford, Seong Kim

Research output: Contribution to journalArticle

70 Scopus citations

Abstract

A simple and efficient way of dispersing hydrophobic nanofibers in aqueous solution was devised, and its utility in production and application of enzyme-loaded nanofibers was demonstrated. Polystyrene-based nanofibers were produced via an electro-spinning process. A small amount of maleic anhydride group in the polystyrene fiber was used for covalent attachment of lipase onto the fiber surface. The pristine polystyrene nanofibers are hydrophobic and aggregate in water, forming a tightly collapsed clump. These nanofibers can be dispersed in a surfactant-free aqueous solution via a simple alcohol pretreatment. The tightly aggregated electro-spun polystyrene nanofibers can be dispersed into a loosely entangled structure in aqueous alcohol solution. Once treated with aqueous alcohol solution, the polystyrene nanofibers remain dispersed even in DI water as long as the nanofibers are not dried during the washing step. The dispersion of polystyrene nanofibers increases the enzyme loading up to ∼8 times and augments the steady-state conversion of a continuous flow reactor filled with enzyme-loaded nanofibers.

Original languageEnglish (US)
Pages (from-to)1266-1270
Number of pages5
JournalBiomacromolecules
Volume8
Issue number4
DOIs
StatePublished - Apr 1 2007

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All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biomaterials
  • Polymers and Plastics
  • Materials Chemistry

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