Fiber extraction from agricultural residues and optimization of bio-based composites

This work addresses the development of a continuous process chain for extracting natural fibers from agricultural residues (beet leaves, corn stalks, and sunflower stalks) and their use in bio-based, biodegradable composite materials. The focus is on the selection and parameterization of suitable pretreatment and processing steps as well as the adaptation of the fiber-polymer interface in order to specifically increase the mechanical performance of the materials. The task combines process engineering development with material characterization and is aimed at students who want to combine practical research with ecological impact.

Tasks

• Development and testing of process chains for fiber extraction (e.g., comminution, pretreatment, mechanical/chemical/enzymatic steps, processing, and drying); systematic parameter studies.
• Production of biocomposites with degradable polymers (e.g., PLA, PBS): compounding and shaping (extrusion, injection molding, or pressing); variation of fiber content, length, and orientation; fiber surface modification if necessary
• Characterization: fiber and composite properties (tensile/bending/notch impact testing, DMA if applicable), microscopy (e.g., SEM), thermal/chemical analysis (DSC/TGA, FTIR if applicable), moisture/water absorption.
• Evaluation and optimization: Correlation of process parameters and material properties, derivation of recommendations for action; documentation of results.

Profile

• Degree in environmental engineering, materials science, (materials-related) mechanical engineering, process engineering, or similar.
• Interest in sustainable materials and practical laboratory work; structured, independent working style.
• Advantages: Experience with plastics processing, shredding and sorting technology, and statistical test planning; confident data analysis (e.g., Python/Excel/Origin). German or English possible.

Scope

• Thesis (bachelor's/master's) or extended research internship.
• Start: flexible; scope and duration depending on format

Application/Contact

If you have any questions or are interested, please send an email to: Philipp von Güldenstubbe