Increased hydrophobicity of carboxymethyl starch film by conjugation with zein.

نویسندگان

  • Koji Takahashi
  • Atsushi Ogata
  • Wen-Hong Yang
  • Makoto Hattori
چکیده

A carboxymethyl starch (CMS) film was prepared by a process in which gelatinized CMS was dried, and subsequently treated with water-soluble carbodiimide in the presence of zein in 70% ethanol or 70% acetone to form acid-amide cross-linkages in order to increase the hydrophobicity of the surface of the film. A small amount of zein protein was found to be present on the surface of the zein-CMS conjugate (Zein-CMS) film, resulting in its insolubility in hot water, low water vapor permeability, and resistance to digestion with alpha-amylase and beta-amylase. Digestion of the Zein-CMS film with protease rendered the film readily water-soluble, suggesting conjugation with zein as an effective means of increasing the hydrophobicity of biodegradable starch-based articles.

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عنوان ژورنال:
  • Bioscience, biotechnology, and biochemistry

دوره 66 6  شماره 

صفحات  -

تاریخ انتشار 2002