文档介绍：黄河水利职业技术学院
毕业论文(设计)报告
题目:淀粉改性絮凝剂制备的研究
学生:
指导教师:
专业:
黄河水利职业技术学院
学生毕业设计指导教师意见
设计课题:
淀粉改性絮凝剂制备的研究
指导教师意见:
论文主要对淀粉接枝改性絮凝剂(S—AM—DMDAAC)的制备及制备中影响因素的探究,以及水处理中的具体应用。论文书写格式符合要求,实验研究思路合理,论文结论反映问题客观,内容基本正确。同意答辩。
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摘要
改性类高分子絮凝剂作为一类生态安全型絮凝剂,近年来得到重视和发展应用。利用淀粉分子结构中含有多个轻基,可通过接枝改性获得良好的絮凝性能。本研究以预糊化的可溶性淀粉为基材,引入丙烯酞胺大分子骨架、二甲基二烯丙基氯化铵(DMDAAC)阳离子单体、过硫酸钾为引发剂、合成了新型高效的阳离子型淀粉改性絮凝剂。
淀粉—丙烯酰胺—二甲基二烯丙基氯化铵接枝物兼有天然高分子和合成高分子的双重性能。它以淀粉半刚性主链为骨架,与柔性的聚丙烯酰胺支链紧密结合,形成庞大、刚柔相济的网状大分子,使之对悬浮体系中的颗粒物有更强的吸附、架桥作用,有利于大分子间的相互作用,降低絮体的亲水性能,加快絮体沉降速度,减小絮凝物体积,提高絮团强度与污泥脱水能力。该接枝聚合物作为絮凝剂使用,具有来源丰富、成本低廉、性价比高的优点,有较大的开发价值和市场潜力。
关键词: 淀粉接枝聚合物絮凝剂絮凝性能
Abstract
Modified polymer ulant ulation 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 ulation 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 ulant.
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 ules strength and sludge dewatering. The graft polymer used as a ulating agent, has rich source, low cost, the advantages of high cost performance, with great development value and market potential.
Keywords:Starch graft polymer ulant ulation pe