Journal of Radiation Research and Radiation Proces ›› 2017, Vol. 35 ›› Issue (1): 10301-010301.doi: 10.11889/j.1000-3436.2017.rrj.35.010301

• RADIATION CHEMISTRY • Previous Articles     Next Articles

Preparation and properties of layered chitosan hydrogel

NI Maojun, CHEN Yuheng, CHEN Zhuping, GUO Dan, WANG Jingxi   

  1. Sichuan institute of atomic energy, Chengdu 610101, China
  • Received:2016-11-03 Revised:2016-11-03 Online:2017-02-20 Published:2017-02-20
  • Supported by:

    Supported by International cooperation projects of Sichuan province (2015 HH0046)

Abstract:

The layered chitosan hydrogels were prepared by a two-step method of low temperature irradiation and freeze/thaw cycle. The poly (vinyl alcohol)/poly (ethylene oxide) (PVA/PEO) was the basic layer and the poly (vinyl alcohol)/chitosan (PVA/CS) was the second layer with antibacterial property. The best preparation technology was selected by the research of absorbed dosage, electron-beam current and concentration of polymer solution. And the structure and properties of the layered hydrogel were characterized by FTIR and SEM, swelling test, mechanical test and antibacterial test. The results showed that the layered hydrogel prepared by this method had an obvious layered structure and closely interlayer combination, there was no significant structural changes. The swelling property increased gradually with the increasing of chitosan content, and the equilibrium swelling degree of 60% CS reached 2 200%. The mechanical strength of layered hydrogel increased firstly and then decreased with the increasing content of chitosan. The tensile strength of layered chitosan with 40% CS increased from 0.35 MPa of PVA/PEO hydrogel to 0.47 MPa. The antibacterial test showed that the layered hydrogels had obviously antibacterial effects on Escherichia coli and staphylococcus, and the antibacterial effects increased with the increasing content of chitosan.

Key words: Layered hydrogel, Low temperature irradiation, Chitosan, Antibacterial property, Mechanical strength

CLC Number: 

  • TL13