Extração, estruturas e propriedades de alfa- e beta-quitina

Química Nova

Sergio P. Campana-filho¹  Douglas De Britto¹  Elisabete Curti¹  Fernanda R. Abreu¹  Marcia B. Cardoso¹  Marcos V. Battisti¹  Priscilla C. Sim¹  Rejane C. Goy¹  Roberta Signini¹  Rodrigo L. Lavall¹ 

[1] ,Universidade de São Paulo Instituto de Química de São Carlos Departamento de Físico-QuímicaSão Carlos SP ,Brasil

关键词: polymorphs;    chitin;    chitosan;   

DOI  :  10.1590/S0100-40422007000300026

来源: SciELO

【 摘 要 】

The fact that alpha- and beta-chitin adopt different arrays in the solid state is explored to emphasize their different properties and distinct spectral characteristics and X ray diffraction patterns. The methods for their extraction from the biomass in view of the preservation of their native structures and aiming to fulfill the claims of purity and uniformity for potential applications are discussed. The different arrays adopted by alpha- and beta-chitin also result in distinct reactivities toward the deacetylation reaction. Thus, the deacetylation of beta-chitin is more efficient owing to the better accessibility to amide groups due to the lower crystallinity of this polymorph.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License