Antioxidant electrospun zein nanofibrous web encapsulating quercetin/cyclodextrin inclusion complex


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Aytac Z., İPEK S. , DURGUN E., UYAR T.

JOURNAL OF MATERIALS SCIENCE, vol.53, no.2, pp.1527-1539, 2018 (Journal Indexed in SCI) identifier

  • Publication Type: Article / Article
  • Volume: 53 Issue: 2
  • Publication Date: 2018
  • Doi Number: 10.1007/s10853-017-1580-x
  • Title of Journal : JOURNAL OF MATERIALS SCIENCE
  • Page Numbers: pp.1527-1539

Abstract

Quercetin/gamma-cyclodextrin inclusion complex (quercetin/gamma-CD-IC)-encapsulated electrospun zein nanofibers were designed as a quick and an efficient antioxidant nanofibrous material via electrospinning. Structural and thermal analyses along with the solubility enhancement as observed in phase-solubility diagram support the successful formation of the inclusion complexation between quercetin and gamma-CD. The molar ratio of quercetin and gamma-CD was found 1:1 in quercetin/gamma-CD-IC which was confirmed with experimental (phase solubility and H-1-NMR) and computational modeling studies. Computational modeling was also useful to indicate that B orientation is more favorable when quercetin is forming host-guest inclusion complexation with gamma-CD from the narrow rim. This result was also consistent with the calculations of the experimental studies performed by H-1-NMR. The successful electrospinning of zein nanofiber encapsulating quercetin/gamma-CD-IC (zein-quercetin/gamma-CD-IC-NF) yielded bead-free nanofiber morphology having 750 +/- 255 nm fiber diameter. For comparative studies, pristine zein nanofibers (zein-NF, 695 +/- 290 nm) and zein nanofibers encapsulating quercetin only (zein-quercetin-NF, 750 +/- 310 nm) were also electrospun. The antioxidant (AO) characteristics of zein-quercetin/gamma-CD-IC-NF were studied by the concentration-dependent AO activity tests.