Cellulose/chitosan hybrid nanofibers from electrospinning of their ester derivatives

Jian Du, You Lo Hsieh

Research output: Contribution to journalArticle

Abstract

A facile approach has been established to generate cellulose/chitosan hybrid nanofibers with full range of compositions by electrospinning of their ester derivatives, cellulose acetate (CA) and dibutyryl chitin (DBC), followed by alkaline hydrolysis to cellulose (Cell) and chitosan (CS). DBC was synthesized by acid-catalyzed acylation of chitin (CHI) with butyric anhydride and the newly formed butyl groups on C3 and C6 were confirmed by FT-IR and 1HNMR. DBC had robust solubility in acetone, DMAc, DMF, ethanol, and acetic acid, all except ethanol were also solvents for CA, allowing mixing of these ester derivatives. Fiber formation by electrospinning of either DBC or CA alone and together in these common solvents and their mixtures were studied. The 1/1 acetone/ acetic acid was found to be the optimal solvent system to generate fibers from either DBC or CA as well as their mixtures at all CA/DBC ratios, resulting in hybrid fibers with diameters ranging from 30 to 350 nm. DBC and CA were well mixed and showed no phase separate in the hybrid fibers. Alkaline hydrolysis (NaOH) of the equal mass CA/DBC nanofibers regenerated Cell and CHI readily via O-deacylation, then proceeded to further deacetylate CHI to CS via N-deacetylation at higher alkaline concentrations and/or temperatures. Under conditions studied, hydrolysis with 5N NaOH at 100 °C for 3 h was optimal to regenerate cellulose/chitosan hybrid nanofibers.

Original languageEnglish (US)
Pages (from-to)247-260
Number of pages14
JournalCellulose
Volume16
Issue number2
DOIs
StatePublished - 2009
Externally publishedYes

Fingerprint

Chitin
Chitosan
Electrospinning
Nanofibers
Cellulose
Esters
Derivatives
Hydrolysis
Fibers
Acetone
Acetic acid
Acetic Acid
Ethanol
Cellulose derivatives
Acylation
Anhydrides
acetylcellulose
Solubility

Keywords

  • Cellulose
  • Cellulose acetate
  • Chitosan
  • Dibutyryl chitin
  • Hybrid
  • Nanofiber

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Cellulose/chitosan hybrid nanofibers from electrospinning of their ester derivatives. / Du, Jian; Hsieh, You Lo.

In: Cellulose, Vol. 16, No. 2, 2009, p. 247-260.

Research output: Contribution to journalArticle

Du, Jian ; Hsieh, You Lo. / Cellulose/chitosan hybrid nanofibers from electrospinning of their ester derivatives. In: Cellulose. 2009 ; Vol. 16, No. 2. pp. 247-260.
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