| 一种新型阳离子型淀粉接枝改性絮凝剂的制备 |
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| 引用本文： | 梁凌熏,曹亚峰,王大鸷,李丽. 一种新型阳离子型淀粉接枝改性絮凝剂的制备[J]. 大连工业大学学报, 2008, 27(2) |
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| 作者姓名： | 梁凌熏 曹亚峰 王大鸷 李丽 |
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| 作者单位： | 大连工业大学化工与材料学院,辽宁,大连,116034;大连工业大学化工与材料学院,辽宁,大连,116034;大连工业大学化工与材料学院,辽宁,大连,116034;大连工业大学化工与材料学院,辽宁,大连,116034 |
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| 摘 要： | 采用自制引发剂,通过水溶液聚合制备了淀粉(St)、丙烯酰胺(AM)接枝共聚物。并以此为原材料进行羟甲基化反应,再与二氰二胺缩合脱水,制备出了阳离子淀粉接枝絮凝剂。羟甲基化反应最佳反应条件为:温度θ=50℃;pH=10;n(HCHO)∶n(St-AM)=1.1∶1.0;t=2 h;与二氰二胺缩合脱水的最佳反应条件:羟甲基化接枝物与二氰二胺的摩尔比为1∶1;pH=4;t=3 h;温度θ=45℃。产品特性黏数为1 023 mL/g,阳离子化度为50%。
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| 关 键 词： | 淀粉 丙烯酰胺 二氰二胺 接枝共聚 |
Preparation of a new cationic starch graft modified flocculant |
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| LIANG Ling-xun,CAO Ya-feng,WANG Da-zhi,LI Li. Preparation of a new cationic starch graft modified flocculant[J]. Journal of Dalian Dalian Polytechnic University, 2008, 27(2) |
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| Authors: | LIANG Ling-xun CAO Ya-feng WANG Da-zhi LI Li |
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| Abstract: | The graft copolymer from starch and acrylamide was prepared by solution polymerization reaction with self-made initiator.Then the cationic starch graft flocculant was prepared by hydroxymethyl reaction followed by condensation-dehydration reaction with cyanide diamine.The optimal conditions for hydroxymethyl reaction were: θ=50 ℃,pH=10,n(HCHO)∶n(St-AM)=1.1∶1,t=2 h;and the optimal conditions for condensation-dehydration reaction were: the reactant proportion was {1∶1}(mol),pH=4,θ=45 ℃,t=3 h.The specific viscosity of the product was 1 023 mL/g and the cation degree was 50%. |
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| Keywords: | starch acrylamide cyanide diamine graft copolymer |
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