Synthesis and characterization of highly flexible thermoplastic films from cyanoethylated corn distillers dried grains with solubles

Chunyan Hu, Narendra Reddy, Kelu Yan, Yiqi Yang

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Corn distillers dried grains with solubles (DDGS) can be made into highly flexible thermoplastic films without the need for plasticizers. DDGS is an abundantly available coproduct of ethanol production that is inexpensive ($80-130/ton) compared to most of the polymers used for thermoplastic applications. In this research, oil-and-zein-free DDGS was cyanoethylated using acrylonitrile, and cyanoethylation conditions were optimized to obtain high percent weight gain of up to 42%. Cyanoethylated DDGS was characterized using 1H NMR, FTIR, DSC, and TGA. Cyanoethylated DDGS was compression molded into thermoplastic films, and the tensile properties of the films were studied. It was found that DDGS films with elongation as high as 38% and strength of 14 MPa could be obtained without the use of any plasticizers. Alternatively, films with strength as high as 651 MPa but with relatively low elongation (2.5%) were obtained by varying the extent of cyanoethylation. This research showed that cyanoethylation could be a viable approach to develop biothermoplastics from biopolymers for applications such as packing films, extrudates, and resins for composites.

Original languageEnglish (US)
Pages (from-to)1723-1728
Number of pages6
JournalJournal of Agricultural and Food Chemistry
Volume59
Issue number5
DOIs
StatePublished - Mar 9 2011

Keywords

  • DDGS
  • cyanoethylation
  • films
  • flexible
  • thermoplastics

ASJC Scopus subject areas

  • Chemistry(all)
  • Agricultural and Biological Sciences(all)

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