Mulch films used to protect crops are used on about 250,000 acres. With support from the Iowa Soybean Promotion Board, Jane's research has demonstrated that soy-based biodegradable films can be made using blowing extrusion, the same technology used to make polyethylene films. Polyethylene films are transparent to UV light, which can produce chemical reactions or oxidations that deteriorate the quality of the products. As agricultural mulch films, soy-based plastics may even help improve soil quality. Preliminary studies show ground soy powder can be utilized by plants, helping them grow.
Research is focused on improving traits of soy-based biodegradable films.
To do that, the researchers need to understand more about soy protein's basic properties. With funding from the United Soybean Board, Jane and other ISU scientists plan to establish a database on using soy protein for plastic materials. Plastic makers have long-established databases for making polyethylene and other synthetic plastic products. For soy protein, there's a lot of information missing. We need to be able to ensure the quality and consistency of soy protein in plastic products.