TY - JOUR
T1 - Cross-linked amylose bioplastic
T2 - a transgenic-based compostable plastic alternative
AU - Sagnelli, Domenico
AU - Hooshmand, Kourosh
AU - Kemmer, Gerdi Christine
AU - Kirkensgaard, Jacob Judas Kain
AU - Mortensen, Kell
AU - Giosafatto, Concetta Valeria L.
AU - Holse, Mette
AU - Hebelstrup, Kim Henrik
AU - Bao, Jinsong
AU - Stelte, Wolfgang
AU - Bjerre, Anne-Belinda
AU - Blennow, Andreas
PY - 2017/10
Y1 - 2017/10
N2 - 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.
AB - 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.
U2 - 10.3390/ijms18102075
DO - 10.3390/ijms18102075
M3 - Journal article
C2 - 28973963
SN - 1661-6596
VL - 18
JO - International Journal of Molecular Sciences
JF - International Journal of Molecular Sciences
IS - 10
M1 - 2075
ER -