*4.2. Bacterial Cellulose and Bacterial Cellulose Composites*

Bacterial cellulose was produced by culturing *Komagataeibacter sucrofermentans* (ATCC® 700178™, Promochem, London, UK) in 100 mL YGC medium (50 g L−<sup>1</sup> glucose, 5.0 g L−<sup>1</sup> yeast extract, 12.5 g L−1, CaCO3) in 250 mL Erlenmeyer flasks in static conditions for at least 120 h at 26 ◦C. A long incubation was necessary to ensure that the pellicles were dense enough to exclude PEG of Mw 6000 (PEG 6000). Composites of bacterial cellulose with pectin were produced by the addition of 0.5% (*w*/*v*) pectin to the YGC medium, and composites of bacterial cellulose with pectin and xyloglucan by addition of 0.25% (*w*/*v*) pectin and 0.25% (*w*/*v*) xyloglucan to the YGC medium (apple pectin, Sigma-Aldrich, Dorset, UK, cat. No. 76282, 70–75% esterified; tamarind seed xyloglucan, Megazyme International, Ireland, Cat. No. P-XYGLN).
