International Conferences on Composite Materials

 7th Edition of International Conferences on Composite Materials

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Award Nomination - https://x-i.me/compram1

Abstract Submission - https://x-i.me/compabst2


Green composite material made from flax and chitosan




Composite materials provide stability in aircraft parts, sports equipment, and everyday household items. However, most of these materials have a poor carbon footprint and are not naturally degradable. A more sustainable alternative has been developed by a team from the University of Stuttgart led by Dr. Linus Stegbauer from the Institute of Interfacial Process Engineering and Plasma Technology (IGVP). This completely bio-based composite material is made of flax fibers and the biopolymer chitosan. The study is published in the journal Composites Science and Technology.

Renewable components

In order to be able to offer more environmentally friendly products, the composites industry needs alternatives to fossil materials. The challenge is to find the right balance between economical production, excellent material properties, and sustainability. Biocomposites made from natural components that are biodegradable, non-toxic, and renewable—and thus have a low carbon footprint—offer one possible solution.

Such a material has now been developed by researchers from the Institute of Interfacial Process Engineering and Plasma Technology (IGVP), the Institute of Aircraft Engineering (IFB), and the Institute of Computer Architecture and Computer Engineering (ITI). The team has successfully produced chitosan–flax biocomposites. These materials

We have conducted extensive studies to test and optimize the manufacturing process in order to achieve mechanical properties in line with those of fossil-based composites," explains Dr. Linus Stegbauer, who initiated the research together with Dr. Stefan Carosella from the IFB.

Among other things, the researchers found that chitosan with a shorter polymer chain length is best suited for impregnating the flax fibers. This minimizes the porosity of the composites. The chitosan–flax composite is not only naturally degradable and made exclusively from CO2-neutral raw materials but also has greater stiffness in terms of density and thus greater lightweight construction potential than composites containing epoxy resin.

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