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生物质化学工程 ›› 2017, Vol. 51 ›› Issue (3): 1-6.doi: 10.3969/j.issn.1673-5854.2017.03.001

• 研究报告 •    下一篇

含硫改性壳聚糖气凝胶的合成及对Cu2+吸附的研究

朱雪换, 杨仁党, 刘萧   

  1. 华南理工大学 制浆造纸工程国家重点实验室, 广东 广州 510640
  • 收稿日期:2016-08-29 出版日期:2017-05-30 发布日期:2017-06-01
  • 通讯作者: 杨仁党(1967-),男,教授,博士生导师,主要研究方向:植物资源综合利用新技术;E-mail:rdyang@scut.edu.cn。 E-mail:rdyang@scut.edu.cn
  • 作者简介:朱雪换(1990-),女,山东菏泽人,硕士生,研究方向:生物质资源综合利用;E-mail:1763624646@qq.com
  • 基金资助:
    制浆造纸工程国家重点实验室自主研究课题(2015ZD04)

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

摘要: 以壳聚糖和二硫代二丙酸二甲酯为原料,通过乙酰化改性,成功制备了壳聚糖衍生物。然后以壳聚糖/壳聚糖衍生物为原料,过硫酸钾为引发剂,N,N'-亚甲基双丙烯酰胺为交联剂,合成了壳聚糖气凝胶/壳聚糖衍生物气凝胶。通过红外光谱(FT-IR)、X射线衍射(XRD)和热重分析(TG)研究了壳聚糖/壳聚糖衍生物的结构性能;同时采用扫描电镜(SEM)对壳聚糖气凝胶/壳聚糖衍生物气凝胶的形貌进行了表征;并且探究了壳聚糖气凝胶/壳聚糖衍生物气凝胶对Cu2+的静态吸附实验。FT-IR结果表明壳聚糖衍生物被成功地合成;XRD和TG分析表明相较于壳聚糖,壳聚糖衍生物的结晶度和热稳定性均降低;SEM显示衍生物气凝胶的孔的数量增多。吸附实验结果表明壳聚糖衍生物气凝胶的吸附性能有了较大提高;在25℃,吸附剂添加量50.0mg且Cu2+溶液初始质量浓度100mg/L,pH值5时,壳聚糖衍生物气凝胶在60min时达到吸附平衡,最大吸附量为48.26mg/g,比未改性的壳聚糖气凝胶的吸附量提高了63.37%。

关键词: 壳聚糖, 气凝胶, 重金属离子, 吸附

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

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