Can I read Individual Chitin Nano-whiskers Prepared from Partially Deacetylated α-Chitin by Fibril Surface Cationization on EtoBox?

Individual Chitin Nano-whiskers Prepared from Partially Deacetylated α-Chitin by Fibril Surface Cationization by Yimin Fan; Tsuguyuki Saito; Akira Isogai is a Materials Science article available to read on EtoBox.

What is Individual Chitin Nano-whiskers Prepared from Partially Deacetylated α-Chitin by Fibril Surface Cationization about?

a-Chitin was partially deacetylated to degrees of N-acetylation (DNAc) 0.74-0.70 by 33% NaOH treatment at 90 °C for 2-4 h. Solid recovery ratios or yields of the products were 85-90%. Crystallinity index and crystal size of the original a-chitin were maintained, showing that the partial deacetylation mostly occurred on the a-chitin crystallite surfaces. Transparent and highly viscous liquids were obtained by disintegration of the partially deacetylated chitins in water at pH 3-4. Transmission electron microscopy (TEM) revealed that the liquids consisted mostly of individual nano-whiskers with average width and length 6.2 ± 1.1 and 250 ± 140 nm, respectively. Some a-chitin nano-fibrils of more than 500 nm in length were also detected in TEM images. Because the DNAc values 0.74-0.70 correspond to 1.34-1.56 mmol g À1 C2-amino group contents, high cationic charges might be formed on the a-chitin fibril surfaces in high density by protonation in water at pH 3-4.

Who reads Individual Chitin Nano-whiskers Prepared from Partially Deacetylated α-Chitin by Fibril Surface Cationization?

Author

Yimin Fan; Tsuguyuki Saito; Akira Isogai

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0144-8617)

Published

2010

Language

EN

Field

Materials Science (Physical Sciences)