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Gewählte Master / Diploma Thesis:

Benjamin Arminger (2017): Mikrofibrillierte Zellulose (MFC)- Einfluss von Produktion und Ausgangsstoffen auf die rheologischen Eigenschaften.
Master / Diploma Thesis - Institut für Holztechnologie und Nachwachsende Rohstoffe, BOKU-Universität für Bodenkultur, pp 63. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
Microfibrillated cellulose (MFC) as a bio-based material of outstanding properties is regarded promising in the search for substitutions of conventional plastics. In this thesis, the suitability of different pulp fractions (being primary and secondary fines, long fibers, mixtures of both, and pulp) as MFC precursors is investigated. They were therefore mechanically fibrillated using a high-pressure homogenizer. Samples were taken after several numbers of homogenization cycles to measure the influence of repetitions on MFC quality. Shear viscosity of MFC suspensions at 0,5 % solid content is mainly influenced by the precursor material. MFC derived from long fibers shows double viscosity values of MFC made from primary fines. The number of homogenization cycles is of minor influence, excessive repetition does not necessarily improve MFC viscosity. The evolution of fiber dimensions throughout the homogenization treatment is measured. Comparison of microscopy images gives information on the fibrillation but does not show differences between precursor materials after several homogenization passes.

Beurteilende(r): Gindl-Altmutter Wolfgang

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