Synthesis and characterization of hydrogels from cellulose acetate by esterification crosslinking with EDTA dianhydride.

Synthesis and characterization of hydrogels from cellulose acetate by esterification crosslinking with EDTA dianhydride.

Senna, André M.; Novak, Katia M.; Carmo, Janaina B. do; Botaro, Vagner R.

Abstract:

In this work, the free OH groups of the polymeric chain of cellulose acetate (CA) with a degree of substitution (DS) 2.5 reacted with ethylenediaminetetraacetic dianhydride (EDTAD) in a homogeneous medium, under stirring at room temperature. The triethylamine was used as catalyst. Through esterification reactions with the free OH groups and EDTAD was possible to obtain hydrogels. The hydrogels were analyzed by IR spectral (FTIR), the percentage of EDTAD-crosslinked and EDTAD-grafted were determined by acid base titration and complexometric titration of the EDTA released after alkaline hydrolysis reaction of hydrogels. The hydrogels have synthesized with varying degrees of crosslinking. In the water absorbency, the hydrogels showed good ability to absorb water.

In this work, the free OH groups of the polymeric chain of cellulose acetate (CA) with a degree of substitution (DS) 2.5 reacted with ethylenediaminetetraacetic dianhydride (EDTAD) in a homogeneous medium, under stirring at room temperature. The triethylamine was used as catalyst. Through esterification reactions with the free OH groups and EDTAD was possible to obtain hydrogels. The hydrogels were analyzed by IR spectral (FTIR), the percentage of EDTAD-crosslinked and EDTAD-grafted were determined by acid base titration and complexometric titration of the EDTA released after alkaline hydrolysis reaction of hydrogels. The hydrogels have synthesized with varying degrees of crosslinking. In the water absorbency, the hydrogels showed good ability to absorb water.

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DOI: 10.5151/chempro-15bmos-BMOS2013_20131014122211

Referências bibliográficas

• [1] 1 Vlierberghe, S.V.; Dubruel, P. And Schacht, E. 2011, Biomacromolecules, 12, 1387,1408.
• [2] 2 Silverstein, R.M.; Bassler, G.C. And Morril, T. C. 2005, 96,102.
• [3] 3 YANG, Y.; Cellulose acetate. In: MARK, J. E. Polymer Data Handbook. New York: Oxford University Press, 1999, 49-56.

Como citar:

Senna, André M.; Novak, Katia M.; Carmo, Janaina B. do; Botaro, Vagner R.; "Synthesis and characterization of hydrogels from cellulose acetate by esterification crosslinking with EDTA dianhydride.", p-300-300. In: In Blucher Chemistry Proceedings, São Paulo, v. 1, n. 2, Dezembro.2013. São Paulo: Blucher, 2013.
ISSN 23184043, DOI 10.5151/chempro-15bmos-BMOS2013_20131014122211