Flexible fibers wet-spun from formic acid modified chitosan

Jinlei Li; Dagang Liu; Chengming Hu; Fengxiang Sun; Williamson Gustave; Huafeng Tian; Shuguang Yang

doi:10.1016/j.carbpol.2015.10.022

Flexible fibers wet-spun from formic acid modified chitosan

Carbohydr Polym. 2016 Jan 20:136:1137-43. doi: 10.1016/j.carbpol.2015.10.022. Epub 2015 Oct 22.

Authors

Jinlei Li¹, Dagang Liu², Chengming Hu¹, Fengxiang Sun¹, Williamson Gustave¹, Huafeng Tian³, Shuguang Yang⁴

Affiliations

¹ Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China.
² Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China. Electronic address: dagang@nuist.edu.cn.
³ Department of Materials Science and Engineering, Beijing Technology and Business University, Beijing 100048, China.
⁴ State Key Laboratory For Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China.

PMID: 26572456
DOI: 10.1016/j.carbpol.2015.10.022

Abstract

The rigidity and low strain of chitosan fibers hindered their broader utility for biomedical applications. In present work, formic acid was employed as an efficient modifier for chitosan to prepare flexible fibers wet-spun from the formic acid modified chitosan solution. The formation of amide linkages between chitosan and formic acid was confirmed by FTIR, (13)C NMR, (1)H NMR and XRD measurements. The degree of formylation evaluated by (1)H NMR spectra was varied from 14.1% to 37.2% as a function of the reaction temperature. The results of the mechanical properties showed that the as-spun fibers exhibited an enhanced ductility with a maximum elongation at break of 21.7% compared with that spun from the chitosan dissolved in diluted acetic acid. The novel flexible chitosan fibers were anticipated to be used as comfortable wound dressing and bandages in biomedical fields.

Keywords: Chitosan; Fibers; Formic acid; Modification.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Amides / chemistry
Biocompatible Materials / chemistry*
Chitosan / chemistry*
Formates / chemistry*
Mechanical Phenomena*

Substances

Amides
Biocompatible Materials
Formates
formic acid
Chitosan