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An Overview on the Technology of Cross-Linking of Starch for Nonfood Applications

Cornell University, College of Agriculture and Life Sciences Department of Food Science, Stocking Hall, Ithaca, New York 14 853, USA, ali.ayoub{at}me.com

Syed S. H. Rizvi

Cornell University, College of Agriculture and Life Sciences Department of Food Science, Stocking Hall, Ithaca, New York 14 853, USA

For commercial success, bioplastics have to possess adequate physical properties. But the same properties of biopolymers — such as starch — that make them environmentally attractive feedstocks can affect their performance as materials. Despite the attractive properties of plant-based plastics, there have been few commercial applications due to their property drawbacks (e.g., high cost, brittleness, and lower impact resistance). Many biopolymers, such as starch, are often hydrophilic and some are even soluble in hot water. These properties have to be managed and controlled through the development of adequate formulations and processing. The primary challenge is to develop fast reactions that can be transformed into viable processes and integrated into existing process lines with economically viable formulations that are friendly to the environment. Cross-linking of starches is the most common method used in polysaccharide chemistry. This article briefly reviews some of the most promising chemistries available for the cross-linking of biodegradable starch materials and their applications.

Key Words: starch • bioplastics • biodegradable • supercritical fluid extrusion • cross-linking • photocrosslinking.

This version was published on January 1, 2009

Journal of Plastic Film and Sheeting, Vol. 25, No. 1, 25-45 (2009)
DOI: 10.1177/8756087909336493


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