改性壳聚糖的制备及其吸附性能的研究

论文编号:SW187  论文字数:8474,页数:20

 摘 要：本篇论文主要研究壳聚糖的制备及其对重金属离子的吸附性能。自制壳聚糖，并用酸碱滴定法测定其脱乙酰度。通过丁二酸酐与壳聚糖和二甲基亚砜发生的开环反应，合成了水溶性N-琥珀酰壳聚糖。用红外分析了制备的N-琥珀酰壳聚糖，解释了他的结构组成。研究了N-琥珀酰壳聚糖对Cu(II),Pb(II),Ni(II)的静态吸附，分别从金属离子的浓度、溶液的PH值、振荡时间及吸附时间考察了其对去除金属离子能力的影响。经原子吸收光谱测定溶液中残留的金属离子浓度，计算去除率。研究结果表明介质酸度对N-琥珀酰壳聚糖的吸附影响力最大，其次是吸附时间和振荡时间。
 
 关键词：壳聚糖；N-琥珀酰壳聚糖；金属离子；吸附

Abstract: This article mainly state the preparation and the adsorption properties of N-Succi- nly-chitosan.The chitosan is prepared by chitin by myself，and the DAC is determined with acid-base titration. N-Succinly-chitosan was prepared via the ring-opening reaction of succinct anhydride with chitosan in dimethyl sulfoxide.The sample was characterized by IR spectra toexplain the N-Succinly-chitosan’s structure.The adsorption properties of N-Succinly-chitosan to Cu(II) Pb(II) Ni(II)ion were investigated.The influence of the amount of N-Succinly-chitosan and the concentration of metal ions，the pH value in solution and adsorption time was discussed.It is found that the concentration of metal ions and the pH value in solution influence more to theadsorption property of N-Succinly-chitosan.

Keywords: chitosan; N-Succinyl-chitosan; metal Ions; adsorption

目 录
中文摘要 I
英文摘要 II
目录 III
1 绪论 1
     1.1前言 1
     1.2壳聚糖的改性研究进展 2
2 实验部分 4
 2.1仪器与试剂  4
     2.2壳聚糖的制备 4
        2.2.1高温快速高碱脱乙酰法 4
        2.2.2低温慢速低碱脱乙酰法 4
     2.3壳聚糖脱乙酰度的测定 4
 2.3.1酸碱滴定法原理 4
 2.3.2溶液的配备 5
 2.3.3测定的步骤 5
 2.3.4计算公式 5
     2.4N-琥珀酰壳聚糖的合成 6
     2.5N-琥珀酰壳聚糖的红外图谱测定  6
 2.6取代度的测定 6
 2.7吸附性能的测定 7
   2.7.1金属离子溶液的配置 7
   2.7.2去除率与吸附容量 7
3 结果与讨论 8
 3.1N-琥珀酰壳聚糖的合成    8
 3.2 N-琥珀酰壳聚糖的红外图谱分析 8
     3.3吸附剂的容量 9
     3.4影响因素 10
        3.4.1改性壳聚糖微球的粒径的影响 10
        3.4.2pH对金属离子吸附能力的影响 10
        3.4.3离子原始浓度对吸附量的影响 11
        3.4.4振荡时间对吸附百分率的影响 12
        3.4.5吸附选择性测试 12
总结与展望 14
致谢 15
参考文献 16