The bulk oxypropylation of chitin and chitosan and the characterization of the ensuing polyols

被引：35

作者：

Fernandes, Susana ^{[1
,2
]}

Freire, Carmen Sofia Rocha ^{[1
,2
]}

Neto, Carlos Pascoal ^{[1
,2
]}

Gandini, Alessandro ^{[1
,2
]}

机构：

[1] Univ Aveiro, CICECO, P-3810193 Aveiro, Portugal

[2] Univ Aveiro, Dept Chem, P-3810193 Aveiro, Portugal

来源：

GREEN CHEMISTRY | 2008年 / 10卷 / 01期

关键词：

D O I：

10.1039/b711648a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Chitin and chitosan were converted into viscous polyols through a simple oxypropylation reaction, with the aim of valorising the less noble fractions or by-products of these valuable renewable resources. This process bears "green'' connotations, given that it requires no solvent, leaves no by-products and no specific operations (separation, purification, etc.) are needed to isolate the entire reaction product. Chitin or chitosan samples were preactivated with KOH and then reacted with an excess of propylene oxide (PO) in an autoclave. In all instances, the reaction product was a viscous liquid made up of oxypropylated chitin or chitosan and PO homopolymer. The two fractions were separated and thoroughly characterized by FTIR and NMR spectroscopy, DSC, TGA and viscosity.

引用

页码：93 / 97

页数：5

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