Extraction, structures and properties of alpha- AND beta-chitin

Química Nova

Sim, Priscilla C.¹  Battisti, Marcos V.¹  Cardoso, Marcia B.¹  Campana-Filho, Sergio P.¹  Universidade de São Paulo, São Carlos, Brasil¹  Britto, Douglas de¹  Goy, Rejane C.¹  Abreu, Fernanda R.¹  Curti, Elisabete¹  Lavall, Rodrigo L.¹  Signini, Roberta¹ 

关键词: polymorphs;    chitin;    chitosan.;   

DOI  :  10.1590/S0100-40422007000300026

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The fact that a- and b-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 a- and b-chitin also result in distinct reactivities toward the deacetylation reaction. Thus, the deacetylation of b-chitin is more efficient owing to the better accessibility to amide groups due to the lower crystallinity of this polymorph.

【 授权许可】

Unknown