改性殼聚糖的制備及其吸附性能的研究

生物工程論文編號(hào):SW187  論文字?jǐn)?shù):8474,頁數(shù):20

目 錄
中文摘要 I
英文摘要 II
目錄 III
1 緒論 1
     1.1前言 1
     1.2殼聚糖的改性研究進(jìn)展 2
2 實(shí)驗(yàn)部分 4
 2.1儀器與試劑  4
     2.2殼聚糖的制備 4
        2.2.1高溫快速高堿脫乙酰法 4
        2.2.2低溫慢速低堿脫乙酰法 4
     2.3殼聚糖脫乙酰度的測(cè)定 4
 2.3.1酸堿滴定法原理 4
 2.3.2溶液的配備 5
 2.3.3測(cè)定的步驟 5
 2.3.4計(jì)算公式 5
     2.4N-琥珀酰殼聚糖的合成 6
     2.5N-琥珀酰殼聚糖的紅外圖譜測(cè)定  6
 2.6取代度的測(cè)定 6
 2.7吸附性能的測(cè)定 7
   2.7.1金屬離子溶液的配置 7
   2.7.2去除率與吸附容量 7
3 結(jié)果與討論 8
 3.1N-琥珀酰殼聚糖的合成    8
 3.2 N-琥珀酰殼聚糖的紅外圖譜分析 8
     3.3吸附劑的容量 9
     3.4影響因素 10
        3.4.1改性殼聚糖微球的粒徑的影響 10
        3.4.2pH對(duì)金屬離子吸附能力的影響 10
        3.4.3離子原始濃度對(duì)吸附量的影響 11
        3.4.4振蕩時(shí)間對(duì)吸附百分率的影響 12
        3.4.5吸附選擇性測(cè)試 12
總結(jié)與展望 14
致謝 15
參考文獻(xiàn) 16

 摘 要：本篇論文主要研究殼聚糖的制備及其對(duì)重金屬離子的吸附性能。自制殼聚糖，并用酸堿滴定法測(cè)定其脫乙酰度。通過丁二酸酐與殼聚糖和二甲基亞砜發(fā)生的開環(huán)反應(yīng)，合成了水溶性N-琥珀酰殼聚糖。用紅外分析了制備的N-琥珀酰殼聚糖，解釋了他的結(jié)構(gòu)組成。研究了N-琥珀酰殼聚糖對(duì)Cu(II),Pb(II),Ni(II)的靜態(tài)吸附，分別從金屬離子的濃度、溶液的PH值、振蕩時(shí)間及吸附時(shí)間考察了其對(duì)去除金屬離子能力的影響。經(jīng)原子吸收光譜測(cè)定溶液中殘留的金屬離子濃度，計(jì)算去除率。研究結(jié)果表明介質(zhì)酸度對(duì)N-琥珀酰殼聚糖的吸附影響力最大，其次是吸附時(shí)間和振蕩時(shí)間。
 
 關(guān)鍵詞：殼聚糖；N-琥珀酰殼聚糖；金屬離子；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