, Volume 26, Issue 10, pp 6189–6199 | Cite as

Characterization of cellulose–chitosan gels prepared using a LiOH/urea aqueous solution

  • Ung-Jin KimEmail author
  • Satoshi Kimura
  • Masahisa Wada
Original Research


Cellulose–chitosan gels were prepared using a LiOH/urea aqueous solution for a co-dissolution. After cellulose and chitosan were dissolved by a freeze–thaw process, the hydrogels were prepared via regeneration in methanol and washing with water. Finally, freeze-dried cellulose–chitosan gels were obtained via solvent exchange (water → ethanol → t-butyl alcohol) followed by freeze-drying. The chitosan contents of the gels were determined by the amino and nitrogen contents, confirming formation at the blend ratio of cellulose and chitosan. Structural and thermal analyses showed that the data profiles were proportional to the content of each component. Although all gels exhibited a three-dimensional porous structure, the introduction of chitosan remarkably increased pore size, resulting in lower transmittance of the hydrogels. The surface area of the cellulose–chitosan gels increased from 247 to 337 m2/g, and the swelling ratio gradually improved with an increase in chitosan content, especially up to 22.9 g/g at pH 5 due to protonation of amino groups. The increase in chitosan content significantly reduced the mechanical strength, while the adsorption capacity of anionic dye was greatly enhanced.


Cellulose Chitosan Gel LiOH/urea 



This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology (NRF-2018R1A2B6002983).

Supplementary material

10570_2019_2527_MOESM1_ESM.docx (57 kb)
Supplementary material 1 (DOCX 57 kb)


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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Department of Plant and Environmental New Resources, College of Life SciencesKyung Hee UniversityYongin-siRepublic of Korea
  2. 2.Department of Biomaterials Science, Graduate School of Agricultural and Life SciencesThe University of TokyoTokyoJapan
  3. 3.Division of Forest and Biomaterials Science, Graduate School of AgricultureKyoto UniversityKyotoJapan

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