毕业论文（设计）报告淀粉改性絮凝剂的制备研究.doc

黄 河 水 利 职 业 技 学 院 业设计 题目：淀粉改性絮凝剂制备的研究 学 生： 业： 月 日 Modified polymer flocculant flocculation agent as a kind of ecological safety, pay attention to and application development in recent years. Using the starch molecular structure containing multiple light base, can be obtained by grafting modification good flocculation performance. This study of prepaste soluble starch as substrate, the introduction of propylene phthalein amine macromolecular backbone, dimethyl di-allyl ammonium chloride (DMDAAC) cationic monomer, and potassium persulphate as initiator, the synthesis of new high efficiency of cationic starch modified flocculant. Of starch acrylamide graft copolymer with double properties of natural polymers and synthetic polymers. It to the main chain of the starch semi-rigid frame, closely integrated with flexible polyacrylamide branched chain, the formation of large, safe reticulate macromolecular, make the particles in suspension system has stronger adsorption, bridging effect, is beneficial to the interaction between macromolecules, reduce the hydrophilic of flocs, accelerate the floc settling velocity, reduce the floc volume, improve the ability of floccules strength and sludge dewatering. The graft polymer used as a flocculating agent, has rich source, low cost, the advantages of high cost performance, with great development value and market potential. Keywords：Starch graft polymer flocculant flocculation performance 目录 1 绪论 1 1.1 絮凝剂在水处理中的重要地位 1 1.2 絮凝剂的分类和特点 1 1.2.1 无机絮凝剂 1 1.2.2 有机絮凝剂 2 1.2.3 微生物絮凝剂 3 1.3 淀粉改性做水处理剂的研究概况及发展趋势 4 2 淀粉改性絮凝剂的合成 5 2.1 淀粉改性的接枝反应原理 5 2.2淀粉改性絮凝剂合成 5 2.2.1 试验材料及仪器 5 2.2.2 合成方法 5 2.2.3 接枝证明 6 2.3 影响接枝反应的因素 6 2.3.1 引发剂浓度对接枝共聚反应的影响 6 2.3.2 单体配比对接枝共聚反应的影响 7 2.3.3 反应时间对接枝共聚反应的影响 7 2.3.4 反应温度对接枝共聚反应的影响 8 2.3.5 小结 9 2.4 数据处理及表征 9 3 淀粉改性絮凝剂应用于废水处理 11 3.1 浊度的测定 11 3.2 搅拌速度和时间对絮凝效果的影响分析 11 3.3废水处理的影响因素 12 3.3.1絮凝剂的絮凝机理 12 3.3.2 投药量对废水浊度的影响 12 3.3.3 温度对废水浊度的影响 13 3.3.4小结 13 4 结论及建议 15 5 致谢 16 6 参考文献