一类新型聚丙烯酰胺的合成与絮凝性能研究

以高价铈盐（硝酸铈铵）和多羟基化合物季戊四醇组成的氧化还原引发体系引发丙烯酰胺自由基聚合合成了一类新型多支状非离子型水溶性聚丙烯酰胺。确定了最佳合成工艺条件为：单体质量分数为15％、引发剂用量1mmol·L^-1、反应时间12h、反应温度47℃，此条件下合成得到的新型聚丙烯酰胺相对分子量达400万以上。研究了新型聚丙烯酰胺的絮凝性能，结果表明，当其与无机絮凝剂聚铝复配时絮凝效果较好，模拟污水的透光率由原来的30％提高至90％以上。

Synthesis and Flocculation Performance of A Novel Polyacrylamide

A novel multi-branched non-ionic water soluble polyaerylamide was synthesized in this paper, using high valence cerium （eerie ammonium nitrate） and multi-hydroxyl reducer （pentaerythritol） as redox initiation system to induce the radical polymerization of acrylamide. The optimum synthetic conditions of the novel polyaerylamide were as follows：mass fraction of acrylamide was 15% ,initiator amount was 1 mmol· L^-2 ,reaction time was 12 h,reaction temperature was 47 ℃. Under these conditions, molecular weight of multi-branched polyacrylamide prepared was above 4 million. The flocculating performance of the multi-branched polyaeryiamide in simulated wastewater was investigated. The result indicated that the flocculating effect was better when it combined with inorganic flocculant polymeric aluminum and the transmittance of wastewater was increased from 30% to 90% or even more.