Optimización de la producción y caracterización de nanocelulosa bacterial obtenida a partir de residuos agroindustriales

PATRICIA CERRUTTI; P. ROLDAN; RICARDO MARTINEZ GARCÍA; MIGUEL GALVAGNO; ANALIA VAZQUEZ; MARIA LAURA FORESTI

Santa Fe

Simposio; XI Simposio Argentino de Polímeros; 2015

On the other hand, greener options to obtain purecellulose from cheaper available agro-industrial byproductsby means of certain microorganisms as algae,moulds or bacteria are also possible. In particular,bacteria of the species Gluconacetobacter xylinus(formerly, Acetobacter xylinum) are capable of producingcellulose in commercial quantities as a 3D network ofribbons of rectangular cross-section, with thicknessesaround 3-10 nm, 30-100 nm in width, and 1-9 μm inlength (Chawla et al., 2009; Moon et al., 2011). Uniquestructural features and properties (high purity, surfacearea, crystallinity, mechanical stability, water holdingcapacity, biodegradability and biological adaptationtogether with low thermal expansion coefficient in theaxial direction), make BNC an interesting material formany practical applications, i.e. (Charreau et al., 2013):Medical applications (artificial blood vessels,bone grafting or for skin therapy)Food industry (functional food additive as athickener and disperser; edible foodpackaging films)Paper industry (reinforcement of high-qualitypapers and optically transparent films)Other uses: electro-acoustic membranes,proton-conducting membranes of fuel cells,transducers, paint additives, coatings,hydraulic fracturing fluids for hydrocarbonsrecovery, photocatalyst sheets, highabsorption composites (nappies and sanitaryproducts), coagulants for water treatment,ultra filters for water purification, etc.