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bce ›› 2017, Vol. 51 ›› Issue (3): 1-6.doi: 10.3969/j.issn.1673-5854.2017.03.001

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Synthesis of Sulfur-modified Chitosan Aerogel and Its Adsorption Properties for Cu2+

ZHU Xuehuan, YANG Rendang, LIU Xiao   

  1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2016-08-29 Online:2017-05-30 Published:2017-06-01

Abstract: Chitosan was reacted with dimethyl 3,3'-dithiodipropionate to obtain chitosan derivative through acetylation modification. With chitosan/chitosan derivative as raw materials,potassium persulfate(KPS) as initiator and N,N'-methylene diacrylamide(NMBA) as crosslinking agent,the chitosan aerogel and chitosan derivative aerogel were synthesized. The structure and properties of chitosan and its derivative were characterized and analyzed by FT-IR,XRD and TG. Meanwhile,chitosan aerogel and chitosan derivative aerogel were characterized by SEM. In addition,the static adsorption of Cu2+ ions on chitosan aerogel and chitosan derivative aerogel were also investigated. The FT-IR showed that the chitosan derivative was successfully synthesized. The XRD and TG analysis showed that the crystallinity and thermal stability of chitosan derivative decreased compared with those of chitosan. The SEM showed that the number of pores in the chitosan derivative aerogel increased. The results of adsorption experiment indicated that the chitosan derivative aerogel showed noticeable improvements in the adsorption capacity of Cu2+ ions. And under the conditions of 25℃,chitosan derivative aerogel 50mg,initial mass concentration of Cu2+ 100mg/L and pH value 5,the adsorption reached equilibrium at 60min with the maximum adsorption capacity of 48.26mg/g,which increased by 63.37% than that of unmodified chitosan aerogel.

Key words: chitosan, aerogel, heavy metal ions, adsorption

CLC Number: