Chitin is a polymer of N-acetyl-D-glucosamine that is found in the exoskeletons of insects, mollusks, coelenterata, nematodes, protozoa, and the cell walls of certain fungi. The length of naturally occurring Chitin Market chains varies, and they are stabilised by hydrogen bridges to a highly ordered crystalline structure. Many researchers have created chitin-based aerogels for a variety of biological applications. Chow and colleagues used a 5% N,N-dimethylacetamide/lithium chloride solvent system to create a series of chitin aerogels. The pore size of the chitin matrixes varied with the freezing method used before lyophilization, according to electron microscopy. In another study, the same procedure was used to create Chitin aerogels by extracting methanol or propanol (solvents) with carbon dioxide under ultracritical conditions. The nano-porous aerogels created had a large surface area and a low density.
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