Formation of Cellulose-Based Composites with Hemicelluloses and Pectins Using Gluconacetobacter Fermentation

Gluconacetobacter xylinus synthesises cellulose in an analogous fashion to plants. Through fermentation of Ga. xylinus in media containing cell wall polysaccharides from the hemicellulose and/or pectin families, composites with cellulose can be produced. These serve as general models for the assembly, structure, and properties of plant cell walls. By studying structure/property relationships of cellulose composites, the effects of defined hemicellulose and/or pectin polysaccharide structures can be investigated. The macroscopic nature of the composites also allows composite mechanical properties to be characterised. The method for producing cellulose-based composites involves reviving and then culturing Ga. xylinus in the presence of desired hemicelluloses and/or pectins. Different conditions are required for construction of hemicellulose- and pectin-containing composites. Fermentation results in a floating mat or pellicle of cellulose-based composite that can be recovered, washed, and then studied under hydrated conditions without any need for intermediate drying.