Beschreibung
Nanocellulose has attracted significant attention due to its outstanding properties, including high mechanical strength, low density, large surface area, and biodegradability. [1] These properties can be significantly influenced by chemical modifications. A promising way to produce nanocellulose is high pressure homogenization (HPH). HPH is a mechanical process that employs pressures up to 1200 bar to break down materials into nanoscale sizes. The process involves pumping the material through a narrow gap, thereby generating intense shear forces. The pressure level and the number of passes can be adjusted. It is possible to continuously produce 20 g dry mass of nanomaterial within hours. The nanocellulose can for instance be used as rheological modifier, for coatings or in 3D bioprinting.The structure of cellulose varies depending on its source, whether derived from plants, bacteria, or algae. Crystallinity, molecular weight, the arrangement of cellulose microfibrils, and the presence of lignin, hemicellulose, other biopolymers and small molecules influence the nanocellulose production process and the properties of the final products. Hence, it is beneficial to gain further knowledge about defibrillation, and the properties of the products depending on the feedstock, and its pretreatment.
In this poster presentation, the fibrillation process was examined depending on different pretreatments [2] and pressure levels during HPH, using refined Eucalyptus Kraft pulp as a precursor material. The pretreatments investigated were oxidations using Fenton´s reagent or TEMPO, 2,2,6,6-Tetramethylpiperidinyloxy, and hydrolysis using enzymes. The concentration of the nanosized fractions was determined by centrifugation analysis, and the size by light microscopy.
| Zeitraum | 4 Feb. 2025 |
|---|---|
| Ereignistitel | AMS Posterdays |
| Veranstaltungstyp | Sonstiges |
| Ort | Graz, ÖsterreichAuf Karte anzeigen |
| Bekanntheitsgrad | Lokal |
Schlagwörter
- nanocellulose