Аннотация:Hybrid aerogels based on lignin and chitosan have been obtained. Lignin was extracted from Vietnamese coconut coir using a solvent extraction method with various solvents, including toluene, 1,4-dioxane, ethanol, and water. The extracted lignin was characterized using IR spectroscopy. Samples have characteristic peaks in the region of 2750-3700 cm-1 associated with -OH groups (water absorption or physical bonding in fatty and aromatic groups) and methyl group; fingerprint region 800-1800 cm-1, mainly associated with the structural units of p-hydroxyphenyl, guaiacyl, and syringyl, as well as with other functional groups. Usually, there is an intense absorption band in the 1600-1720 cm-1, characteristic of carbonyl and carboxyl groups associated with aromatic units. On the basis of the obtained lignin, hybrid aerogels were obtained. The resulting hybrid aerogels were characterized using nitrogen porosimetry and scanning electron microscopy. The specific surface area of hybrid aerogels is from 217 to 440 m2/g; average pore size from 5 to 25 nm; total mesopore volume from 0.8 to 2.2 cm3/g; total volume of all pores from 9.4 to 17.2 cm3/g; apparent density from 0.056 to 0.1 g/cm3; porosity from 94 to 97%; linear shrinkage from 3.5 to 15.3%. The resulting hybrid aerogels based on chitosan and lignin with a mass ratio of 10:1 have a developed mesoporous structure, which is promising for the development of effective drug delivery systems, catalyst carriers, sorbents, and sensors.