Authors:Edson da Silva Filho, Sirlane Santana, Júlio Melo, Fernando Oliveira, and Claudio Airoldi
Cellulose was chemically modified with SOCl2 to obtain chlorodeoxycellulose, followed by a reaction that gave bonded ethylene-1,2-diamine (en), producing 6-(2′-aminoethylamino)-6-deoxycellulose.
The reactions were carried out without the presence of solvent, in water or in N,N′-dimethylformamide, in which the highest amount of amino compound was incorporated onto the biopolymer backbone. The X-ray
diffraction patterns for the chlorodeoxycellulose indicate new crystallinities that result from hydrogen bonds established
through bonded chorine atoms and the remaining hydroxyl groups, while all the aminodeoxycelluloses were amorphous compounds.
Thermal stabilities, for all aminated celluloses gave lower final mass losses than for the chlorinated biopolymer, whose value
is lower than unmodified cellulose.