淀粉接枝丙烯酰胺改性研究.doc

本科学生毕业论文 淀粉接枝丙烯酰胺改性研究 The Graduation Thesis for Bachelors Degree Modification of the Starch Graft Acrylamide Heilongjiang Institute of Technology 摘 要 淀粉接枝丙烯酰胺聚合物絮凝效果影响的因素有很多，PH值，反应温度，反应时间，单体的浓度，引发剂的质量，反应时间，单体的配比等因素，本文主要对四个因素进行研究：淀粉与丙烯酰胺质量比，引发剂的质量，反应温度，反应时间。用正交设计法取得最佳的工艺条件。 对淀粉进行接枝共聚改性，制得的淀粉具有、凝胶颗粒分散性好的优点。采用单体通过水溶液聚合法，以过硫酸为引发体系，制得了淀粉研究了不同反应因素对接枝共聚反应相关参数的影响，以及对的影响。淀粉-A接枝共聚物的最佳优化反应条件为：聚合反应温度为55℃，聚合反应时间为3h，(淀粉) ：(丙烯) =1:3，引发剂，此时。 ABSTRACT Starch of grafting acrylamide polymer flocculating effect of the factors, pH value, reaction temperature, reaction time, monomer concentration, initiator of the quality of the agent, reaction time, monomer ratio and other factors, this paper mainly on the fourfactors: the quality of starch with acrylamide, causing the quality of the agent, the reaction temperature, reaction time. Orthogonal design method to obtain the optimum process conditions. Graft copolymerization of starch, the starch graft copolymer obtained with flocculation, gel particle dispersion to good advantage. Using acrylamide (AM) monomer solution polymerization, potassium persulfate as initiator system, the system had a modified polymer of starch graft acrylamide. Different reactions on the graft copolymerization reaction parameters, as well as the impact of flocculation. AM graft copolymer of starch-optimized reaction conditions: reaction temperature was 55℃, the reaction time of 3h, S (starch): AM (acrylamide) = 1:3, the quality of the initiator 0.3g The light transmission rate of 78.5 percent, 98.5 percent of the grafting efficiency, grafting ratio of 140.7%, 68.3% of the monomer conversion. Keywords: Starch；Acrylamide；Flocculants；The Grafting Reaction；Orthogonal Test  目 录 摘 要 I ABSTRACT II 第1章 绪 论 1 1.1 课题背景与研究意义 1 1.2 絮凝剂的种类 2 1.2.1 有机高分子絮凝剂 2 1.2.2无机高分子絮凝剂 3 1.2.3 天然高分子絮凝剂 3 1.3 淀粉接枝丙烯酰胺改性物应用 4 1.4 国内外研究现状 4 1.4.1 国内主要技术进展 4 1.4.2 国外研究现状 5 1.5 淀粉接枝共聚物前景 6 1.6 论文研究的主要内容 7 第2章 实验部分 8 2.1 实验内容 8 2.2 实验药品及仪器 8 2.3 实验原理及合成方法 9 2.3.1 实验原理 9 2.3.2 合成方法 11 2.4 正交实