Thermoplastic films from plant proteins

Narendra Reddy, Yiqi Yang

Research output: Contribution to journalReview article

32 Citations (Scopus)

Abstract

Films developed by thermoprocessing of plant proteins have better mechanical properties and are relatively inexpensive and environmentally friendly compared to casting films from solutions. Common plant proteins such as soyproteins, wheat gluten, and corn zein and proteins from lesser grown cereal crops such as peanut, barley, sunflower, and sorghum have all been injection or compression molded into films. Since plant proteins are non-thermoplastic, it is necessary to chemically or physically modify the proteins and make them thermoplastic. Extensive studies on the addition of plasticizers, pre-treatment of proteins with alkali, steam, chemical modifications such as acetylation and blending of the proteins with other biopolymers and synthetic polymers have been done to modify proteins and develop thermoplastics. Despite the extensive work, thermoplastic films obtained from plant proteins do not have the properties that can meet or exceed properties of films made from synthetic polymers. Poor water stability and brittleness are the two major limitations of plant protein films. This review presents an overview of the methods and processing conditions used to develop thermoplastic films from plant proteins and the properties of the films. A critical assessment of approaches that have been used so far, limitations of these approaches and potential considerations for future studies to overcome the current limitations have been discussed.

Original languageEnglish (US)
Pages (from-to)729-736
Number of pages8
JournalJournal of Applied Polymer Science
Volume130
Issue number2
DOIs
StatePublished - Oct 15 2013

Fingerprint

Plant Proteins
Thermoplastics
Proteins
Polymers
Zein
Plasticizers
Acetylation
Biopolymers
Glutens
Steam
Chemical modification
Alkalies
Brittleness
Crops
Casting
Compaction
Mechanical properties
Water
Processing

Keywords

  • biodegradable
  • biomaterials
  • biopolymers and renewable polymers
  • proteins, films

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Surfaces, Coatings and Films
  • Chemistry(all)

Cite this

Thermoplastic films from plant proteins. / Reddy, Narendra; Yang, Yiqi.

In: Journal of Applied Polymer Science, Vol. 130, No. 2, 15.10.2013, p. 729-736.

Research output: Contribution to journalReview article

Reddy, Narendra ; Yang, Yiqi. / Thermoplastic films from plant proteins. In: Journal of Applied Polymer Science. 2013 ; Vol. 130, No. 2. pp. 729-736.
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