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Compatible Blends of Zein and Polyvinylpyrrolidone

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Abstract

Blends of zein and polyvinylpyrrolidone (PVP) were compared based on their tensile properties, thermal properties and morphology. Zein was blended with polyvinylpyrrolidone of varying molecular weights (10, 55, and 1,300 kDa) and films were cast from ethanol solutions. Films cast using the higher molecular weight polymers showed an improvement in tensile strength, up to a 24% increase, compared to control. Differential scanning calorimetry data for the blends showed single Tm and Tg values of an intermediate value between those of zein and PVP control samples. Field emission scanning electron microscopy images show no obvious inhomogeneities, and confocal fluorescence microscopy showed no decreased uniformity in the PVP/zein films compared to control. Electrospun fibers of the zein/PVP blends were also obtained. These findings suggest that zein and polyvinylpyrrolidone combine to form a compatible blend, the first such blend of zein with a synthetic polymer.

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Acknowledgments

We thank the Illinois Corn Marketing Board for financial support of this research and Ashley Maness for performing the thermal analyses and spinning fiber.

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Authors and Affiliations

  1. Plant Polymer Research, NCAUR, USDA-ARS, 1815 N. University St., Peoria, IL, 61604, USA

    Kristen Kruger Woods & Gordon W. Selling

  2. New Mexico State University, Electron Microscope Laboratory, PO Box 30001, Las Cruces, NM, 88003, USA

    Peter H. Cooke

Authors
  1. Kristen Kruger Woods
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  2. Gordon W. Selling
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  3. Peter H. Cooke
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Corresponding author

Correspondence to Gordon W. Selling.

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Names are necessary to report factually on available data; however, the USDA neither guarantees nor warrants the standard of the product, and the use of the name by USDA implies no approval of the product to the exclusion of others that may also be suitable.

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Woods, K.K., Selling, G.W. & Cooke, P.H. Compatible Blends of Zein and Polyvinylpyrrolidone. J Polym Environ 17, 115–122 (2009). https://doi.org/10.1007/s10924-009-0128-9

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  • DOI: https://doi.org/10.1007/s10924-009-0128-9

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