疏水缔合阳离子聚丙烯酰胺污泥脱水剂的合成及其表征

选用丙烯酰胺（AM）、丙烯酰氧乙基三甲基氯化铵（DAC）和丙烯酸丁酯（BA）3种单体,在引发剂作用下,紫外光照射聚合得到疏水缔合阳离子聚丙烯酰胺高分子絮凝剂（HACPAM）.研究了单体浓度、AM/DAC单体质量比、BA质量分数、十六烷基三甲基溴化铵（CTAB）质量分数、引发剂浓度、光照时间因素对HACPAM的分子量的影响,得到了最优制备条件,结果表明,在单体浓度30％、AM/DAC单体质量比70∶30、BA质量分数2％、CTAB质量分数2％、引发剂浓度3‰、光照时间100 min条件下,制得分子量为849万的HACPAM.采用红外光谱、扫描电镜、差热-热重对聚合产物的结构和性能进行表征,证明了单体间发生了聚合反应,合成了HACPAM,且聚合物具有良好的热稳定性.

Synthesis and Characterization of Hydrophobic Associating Cationic Polyacrylamide Flocculant for Sludge Dewatering

The P （AM-DAC-BA）, one kind of hydrophobically associating cationic polyacrylamide （HACPAM）, was synthesized with acrylamide （AM）, acryloyloxyethyltrimethyl ammonium chloride （DAC） and butylacrylate （BA） by the micellar free radical copolymerization technique. The reaction was carried out under the irradiation of UV light. The effects of main factors, i.e. monomers concentration, mass ratio of AM and DAC.BA ratio.CTAB ratio, photoinitiator concentration and irradiation time on the molecular weight were investigated. The results showed that HACPAM with the molecular weight of 849 ×104 can be synthetized when the monomer concentration was 30%, the mass ratio of AM and DAC was 70： 30, the BA ratio was 2%, the CTAB ratio was 2%, the initiator concentration was 3% and the irradiation time was 100 rain. The chemical structure and performance were characterized by FT-IR, SEM,DTA-TGA. The results showed that the polymerization reaction between monomer happened, the HACPAM was synthesized. In addition, the polymerizate heat stability was fine.