Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/72947
Type: Artigo de periódico
Title: X-ray diffraction and thermogravimetry data of cellulose, chlorodeoxycellulose and aminodeoxycellulose
Author: da Silva, EC
Santana, SAA
Melo, JCP
Oliveira, FJVE
Airoldi, C
Abstract: Cellulose was chemically modified with SOCl(2) 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.
Subject: Ethylene-1,2-diamine
Cellulose
Solvent-free
Thermogravimetry
X-ray
Country: Holanda
Editor: Springer
Citation: Journal Of Thermal Analysis And Calorimetry. Springer, v. 100, n. 1, n. 315, n. 321, 2010.
Rights: fechado
Identifier DOI: 10.1007/s10973-009-0270-6
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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