Study on antibacterial activity of O-carboxymethyl chitosan sodium salt and spinnability of O-carboxymethyl chitosan sodium salt/cellulose polyblends in N-methylmorpholine-N-oxide system
- 作者：Xiaofei Liu<sup>asup><sup> ; sup><sup>bsup><sup> ; sup><sup>liuxf315@yahoo.cnsup> ; [Author Vitae] ; Qi Wang<sup>asup><sup> ; sup><sup>bsup> ; Xupin Zhuang<sup>csup> ; Bo Wu<sup>asup><sup> ; sup><sup>bsup> ; Fan Yang<sup>asup><sup> ; sup><sup>bsup> ; Anrong Zeng<sup>asup><sup> ; sup><sup>bsup>
- 关键词：O-carboxymethyl chitosan sodium salt ; N-methylmorpholine-N-oxide ; Solubility ; Antibacterial activity ; Rheological property ; Lyocell
- 刊名：Carbohydrate Polymers
- 出版年：2012
- 期刊代码：14_01448617
- 类别：ch
- 出版时间：5 June, 2012
- 卷：89
- 期：1
- 页码：104-110
- 文件大小：695 K
摘要
O-carboxymethyl chitosan sodium salt (NaCMCh), which has good antibacterial activity and solubility in N-methylmorpholine-N-oxide (NMMO) after being treated by sodium hydroxide solution, was blended with cellulose NMMO/H<sub>2sub>O solution to study the spinnability. The effect of molecular weight on antibacterial activity and solubility was discussed. The optimal range of molecular weights is from 8 脳 10<sup>4sup> to 1.9 脳 10<sup>5sup>. The rheological properties of NaCMCh/cellulose polyblends in steady-shear were investigated. The results are presented using appropriate master curves for the temperature and concentration effects. The flow behavior index of the polyblends increase with increasing temperature and NaCMCh content. Apparent viscosity and zero-shear viscosity decrease, but the critical shear rate increases due to the addition of NaCMCh. The polyblends with NaCMCh display a lower structural viscosity index. Finally, the fibers were successfully spun using the lyocell process with NMMO/H<sub>2sub>O and the fibers with NaCMCh exhibit good mechanical properties and moisture absorption.