| 淀粉与丙烯酰胺接枝共聚物的合成及絮凝助留性能 |
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| 引用本文： | 邱广明,邱广亮.淀粉与丙烯酰胺接枝共聚物的合成及絮凝助留性能[J].精细化工,2001,18(3):162-164,175. |
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| 作者姓名： | 邱广明 邱广亮 |
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| 作者单位： | 1. 内蒙古工业大学 电力学院 动力工程系,
2. 内蒙古师范大学 生物系, |
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| 基金项目： | 内蒙古自然基金资助项目!(990 3 0 1-5 )&& |
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| 摘 要： | 采用乳液聚合技术 ,以水为分散介质 ,十二烷基苯磺酸钠为乳化剂和分散稳定剂 ,用过硫酸钾引发丙烯酰胺 (AM)对淀粉 (St)的接枝共聚。接枝共聚物 (St -PAM)在 16 5 0、16 16和 1416cm-1(聚丙烯酰胺PAM的特征吸收 )处的红外光谱表明 ,在淀粉链上引入了酰胺基。控制接枝共聚条件 ,可使丙烯酰胺的接枝效率 (共聚单体占全部聚合单体的质量分数 )达到 90 .0 % ,共聚物中丙烯酰胺的接枝百分率 (St-PAM中PAM的质量分数 )达到 6 0 .9%。显著地改善了淀粉的糊化特性 ,减弱了直链淀粉的凝沉和胶凝倾向 ,使其在冷水中就具有良好的分散性。研究了淀粉与丙烯酰胺接枝共聚的特点 ,考察了单体用量、反应温度、引发剂等因素对接枝共聚的影响 ,以及接枝共聚物对纸浆的絮凝和助留效果的影响。共聚物中丙烯酰胺的接枝百分率愈高 ,纸浆的絮凝速度和留着率愈大 ,接枝百分率为 6 0 .9%的共聚物可使纸浆的网上留着率提高 12 .3%。
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| 关 键 词： | 接枝共聚 淀粉 丙烯酰胺 絮凝 |
| 文章编号： | 1003-5214(2001)03-0162-04 |
Graft Copolymerization of Acrylamide on Starch:Synthesis and Ability of Flocculation and Remaining Aid |
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| QIU Guang-ming,QIU Guang-liang.Graft Copolymerization of Acrylamide on Starch:Synthesis and Ability of Flocculation and Remaining Aid[J].Fine Chemicals,2001,18(3):162-164,175. |
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| Authors: | QIU Guang-ming QIU Guang-liang |
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| Affiliation: | QIU Guang ming 1,QIU Guang liang 2 |
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| Abstract: | Graft copolymerization of acrylamide (AM) on starch in aqueous medium was carried out by means of adsorbing potassium persulfate (KPS) and acrylamide on starch beforehand.The effects of concentrations of monomer (AM) and initiator (KPS) and temperature on copolymerization were investigated.Under the optimum conditions,both conversion of AM and graft efficiency increased and the graft of polyacrylamide (PAM) in copolymer reached 60.9%.Experimental results showed that copolymers having high graft percentage of PAM possessed good ability of flocculation and remaining aid.The efficiency of remaining aid reached 12.3% when the graft of PAM in copolymer was 60.9%. |
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| Keywords: | graft copolymerization starch acrylamide flocculation |
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