Cross-Linked Amylose Bio-Plastic: A Transgenic-Based Compostable Plastic Alternative

International Journal of Molecular Sciences

Anne-Belinda Bjerre¹  Wolfgang Stelte¹  Jinsong Bao²  Concetta Valeria L. Giosafatto³  Mette Holse⁴  Kim H. Hebelstrup⁵  Domenico Sagnelli⁶  Andreas Blennow⁶  Kourosh Hooshmand⁶  Gerdi Christine Kemmer⁶  Kell Mortensen⁷  Jacob J. K. Kirkensgaard⁷ 

[1] Center for Bioresources and Biorefinery, Danish Technological Institute, Gregersenvej 7, 2630 Taatsrup, Denmark;College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China;Department of Chemical Science, University of Naples, 80126 Napoli, Italy;Department of Food Science, University of Copenhagen, 1958 Frederiksberg, Denmark;Department of Molecular Biology and Genetics, Aarhus University, 4200 Slagelse, Denmark;Department of Plant and Environmental Sciences, University of Copenhagen, 1871 Frederiksberg, Denmark;Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark;

关键词: starch;    amylose;    bioplastic;    cross-linker;    amylose permeability;    cross-link assay;    citric acid;   

DOI  :  10.3390/ijms18102075

来源: DOAJ

【 摘 要 】

Bio-plastics and bio-materials are composed of natural or biomass derived polymers, offering solutions to solve immediate environmental issues. Polysaccharide-based bio-plastics represent important alternatives to conventional plastic because of their intrinsic biodegradable nature. Amylose-only (AO), an engineered barley starch with 99% amylose, was tested to produce cross-linked all-natural bioplastic using normal barley starch as a control. Glycerol was used as plasticizer and citrate cross-linking was used to improve the mechanical properties of cross-linked AO starch extrudates. Extrusion converted the control starch from A-type to Vh- and B-type crystals, showing a complete melting of the starch crystals in the raw starch granules. The cross-linked AO and control starch specimens displayed an additional wide-angle diffraction reflection. Phospholipids complexed with Vh-type single helices constituted an integrated part of the AO starch specimens. Gas permeability tests of selected starch-based prototypes demonstrated properties comparable to that of commercial Mater-Bi© plastic. The cross-linked AO prototypes had composting characteristics not different from the control, indicating that the modified starch behaves the same as normal starch. The data shows the feasibility of producing all-natural bioplastic using designer starch as raw material.

【 授权许可】

Unknown