Rheology and pressurised gyration of starch and starch-loaded poly(ethylene oxide)

S. Mahalingam, Guogang Ren, M. J. Edirisinghe

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23 Citations (Scopus)


This work investigates the rheology and spinning of starch and starch-loaded poly(ethylene oxide) (PEO) by pressurised gyration in order to prepare nanofibres. The spinning dope's rheological properties played a crucial role in fibre formation. Newtonian behaviour is observed in 1-20 wt% starch suspensions and non-Newtonian behaviour is found in all the PEO-starch mixtures. Pressurised gyration of the starch suspensions produced beads only but PEO-starch mixtures generated fibres. The fibre diameter of the PEO-starch samples is shown to be a function of polymer concentration and rotating speed of the gyration system. Fibre formation can only be facilitated below a certain working pressure. The concentration of starch in the PEO-starch mixtures is crucial in defining whether beaded or continuous fibres were generated and this is related to the composition of the spinning dope. FT-IR, XRD and microscopy studies indicated very good miscibility of starch and PEO in the nanofibres. The storage modulus of the PEO-starch were also studied as a function of temperature (30-150 °C) and showed interesting results but it was not possible to deduce general trends valid for the entire temperature range.

Original languageEnglish
Pages (from-to)279-287
Number of pages9
JournalCarbohydrate Polymers
Early online date15 Aug 2014
Publication statusPublished - 19 Dec 2014


  • Gyration
  • Nanofibres
  • Polymer
  • Pressure
  • Starch


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