Electrospinning zwitterion-containing nanoscale acrylic fibers

Rebecca H. Brown, Matthew T. Hunley, Michael H. Allen, Timothy Edward Long*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Free radical copolymerization of n-butyl acrylate and a sulfobetaine methacrylamide derivative provided high molecular weight zwitterionic copolymers containing 6-13 mol% betaine functionality, and the electrospinning of low T g zwitterionomers was explored for the first time. Copolymerizations were performed in dimethylsulfoxide (DMSO) rather than fluorinated solvents previously reported in the literature. Dynamic mechanical analysis of zwitterionomer films revealed biphasic morphology and featured a rubbery plateau and two distinct thermal transitions. Electrospinning from chloroform/ethanol (80/20 v/v) solutions at low concentrations between 2 and 7 wt% afforded nanoscale polymeric fibers with diameters near 100 nm. The presence of only 6 mol% zwitterion allowed the formation of low T g, free-standing, non-woven mats, and we hypothesize that zwitterionic aggregation rather than chain entanglements facilitated electrospinning at these relatively low solution concentrations. To our knowledge, this is the first report of electrospun zwitterionic polymers and these non-woven membranes are expected to lead to new applications for sulfobetaine copolymers.

Original languageEnglish
Pages (from-to)4781-4787
Number of pages7
Issue number20
Publication statusPublished - 2009 Sept 23
Externally publishedYes


  • Electrospinning
  • Ionomer
  • Zwitterion

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics


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