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论文首先以水溶性壳聚糖为分散稳定剂,采用分散聚合的方式,合成一种新型絮凝剂阳离子聚丙烯酰胺P(CMTC-AMDMC),并对该产品进行了红外光谱及核磁共振表征。其次,研究了絮凝剂的使用量以及分子量对高岭土悬浮液的除浊性能的影响。通过红外光谱及核磁共振谱表征可知,CMTC、AM和DMC在一定条件下发生了接枝聚合反应,单体转化率可达到95%左右;絮凝剂P(CMTC-AM-DMC)最佳投加量为0.32~2.0 mg/L;高岭土悬浮液浓度越高,除浊率越大;当搅拌速度在150 r/min下,搅拌10 min时,絮凝过程即可达到平衡,除浊率达到90%以上;絮凝剂的分子量对160目0.5 g/L的高岭土悬浮液除浊性能影响较大,分子量为197.1×104g/mol时,除浊率为90%,105.7×104g/mol时,除浊率降低至80%。
In this paper, a new type of flocculant cationic polyacrylamide P (CMTC-AMDMC) was synthesized by dispersion polymerization using water-soluble chitosan as dispersion stabilizer. The product was characterized by IR and 1H-NMR. Secondly, the effects of flocculant dosage and molecular weight on turbidity removal performance of kaolin suspension were studied. The results of IR and NMR showed that the graft polymerization of CMTC, AM and DMC occurred under certain conditions, and the monomer conversion rate could reach about 95%. The optimum dosage of CMTC-AM-DMC was When the stirring speed is 150 r / min, stirring for 10 min, the flocculation process can achieve the equilibrium, the turbidity removal rate reaches 90% The molecular weight of the flocculant greatly affected the turbidity removal performance of the kaolinite suspension with 0.5 g / L of 160 mesh. When the molecular weight was 197.1 × 104 g / mol, the turbidity removal rate was higher when the turbidity removal rate was 90% and 105.7 × 104 g / mol Reduce to 80%.