Preparation and Characterization of Chitosan Composite Membranes Crosslinked by Carboxyl-capped Poly(ethylene glycol)

Meng-tan Cai; Jia-xing Zhang; Yuan-wei Chen; Jun Cao; Meng-tian Leng; Shao-dong Hu; Xiang-lin Luo

doi:10.1007/s10118-014-1373-5

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Preparation and Characterization of Chitosan Composite Membranes Crosslinked by Carboxyl-capped Poly(ethylene glycol)

Updated：2021-06-21

- Preparation and Characterization of Chitosan Composite Membranes Crosslinked by Carboxyl-capped Poly(ethylene glycol)
- Chinese Journal of Polymer Science Vol. 32, Issue 2, Pages: 236-244(2014)
- Affiliations：
  
  a.College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
  b.State Key Laboratory of Polymer Materials and Engineering, Sichuan University, Chengdu 610065, China
- Author bio：
  
  **Yuan-wei Chen (陈元维), E-mail: chenyuanweizm@163.com
  Xiang-lin Luo (罗祥林), E-mail: luoxl@scu.edu.cn
- Funds：
- DOI：10.1007/s10118-014-1373-5
  CLC：
- Received：03 June 2013，
  
  Revised：2013-08-20，
  
  Accepted：30 August 2013，
  
  Published：2014-02
- Accepted：
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Meng-tan Cai, Jia-xing Zhang, Yuan-wei Chen, et al. Preparation and Characterization of Chitosan Composite Membranes Crosslinked by Carboxyl-capped Poly(ethylene glycol)[J]. Chinese Journal of Polymer Science, 2014, 32(2): 236-244.
DOI：

Meng-tan Cai, Jia-xing Zhang, Yuan-wei Chen, et al. Preparation and Characterization of Chitosan Composite Membranes Crosslinked by Carboxyl-capped Poly(ethylene glycol)[J]. Chinese Journal of Polymer Science, 2014, 32(2): 236-244. DOI： 10.1007/s10118-014-1373-5.

摘要

Abstract

In this study a series of chemically crosslinked chitosan/poly(ethylene glycol) (CS/PEG) composite membranes were prepared with PEG as a crosslinking reagent other than an additional blend. First

carboxyl-capped poly(ethylene glycol) (HOOC-PEG-COOH) was synthesized. Dense CS/PEG composite membranes were then prepared by casting/evaporation of CS and HOOC-PEG-COOH mixture in acetic acid solution. Chitosan was chemically crosslinked due to the amidation between the carboxyl in HOOC-PEG-COOH and the amino in chitosan under heating

as confirmed by FTIR analysis. The hydrophilicity

water-resistance and mechanical properties of pure and crosslinked chitosan membranes were characterized

respectively. The results of water contact angle and water absorption showed that the hydrophilicity of chitosan membranes could be significantly improved

while no significant difference of weight loss between pure chitosan membranes and crosslinked ones was detected

indicating that composite membranes with amidation crosslinking possess excellent water resistanance ability. Moreover

the tensile strength of chitosan membranes could be significantly enhanced with the addition of certain amount of HOOC-PEG-COOH crosslinker

while the elongation at break didn’t degrade at the same time. Additionally

the results of swelling behaviors in water at different pH suggested that the composite membranes were pH sensitive.

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