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Development of high-strength biobased binding twines and investigations on their degradability in soil and in rotting
Project
Project code: 22021116
Contract period: 01.01.2019
- 31.12.2020
Budget: 233,496 Euro
Purpose of research: Applied research
Keywords: bioplastics, biodegradability, recycling, renewable ressources
The development of durable products made of biodegradable plastics for technical applications often lacks corresponding data on the functionality of biodegradability. Only for polylactic acid and petrochemically based and biodegradable polyesters have been investigated, but these are also mainly related to packaging materials and mulch films. However, no data is known about binder twines made of bioplastics. In general, polyhydroxyalkanoates are highly biodegradable and biocompatible. A strength comparability to that of polypropylene is another advantage, which faces the disadvantages such as brittle material properties and a narrow processing window. The production of biodegradable materials on a PHA basis with defined mechanical properties and investigations to specifically influence the biodegradability are the overall objective of the study. The evaluation of the biodegradability of the modified compounds is based on studies of degradation in rotting and soil. Furthermore, the influence of stretching of films from the modified compounds on a laboratory scale on the mechanical properties is to be investigated and ribbons produced, since an increase in strength in the stretching direction is expected by stretching the molecules in the compound. One intended application of these stretched materials is the production of biobased and biodegradable binding twines for mass users such as agricultural and forestry enterprises. This could replace the previously used polypropylene binding twines, the residues of which pose a health risk not only to agricultural machinery but also to livestock and wildlife. The binding twines are produced from the modified PHA compounds and the suitability of the ribbons is estimated by determining their mechanical properties.
Section overview
Subjects
- Resource management
- Renewable Resources
