阳离子聚丙烯酰胺-TiO_2复配絮凝剂的合成及性能

Synthesis and Performance of Cationic polyacrylamide-TiO_2 Composite Flocculant

以甲基丙烯酰氧乙基三甲基氯化铵(DMC)和丙烯酰胺(AM)为单体,K2S2O8-NaHSO3为引发剂,采用水溶液聚合法合成了阳离子聚丙烯酰胺P(DMC-AM),将表面处理后的纳米TiO2与P(DMC-AM)复配,得到P(DMC-AM)-TiO2复配絮凝剂。考察了原料配比、反应条件对P(DMC-AM)黏度的影响,结果表明:在m(DMC)∶m(AM)=0.18、引发剂加入量为0.5%(质量分数,下同)、聚合反应时间3h、聚合溶液pH=4.0条件下,P(DMC-AM)絮凝剂的特性黏度最佳;纳米TiO2加入量为5%时,复配絮凝剂对酸性黑10B染料模拟废水的脱色性能最好。

Cationic polyacrylamide P（DMC-AM） was synthesized by aqueous solution polymerization process using methacryloyloxyethyltrimethyl ammonium chloride （DMC） and acrylamide （AM） as monomers and K28208-NaHSO3 as initiator. And then P （DMC-AM）-TiO2 composite flocculant was prepared by mixing surface-treated nano-TiO2 and P （DMC-AM）. The effects of the proportion of raw materials and the reaction conditions on the intrinsic viscosity of P（DMC-AM） were studied. The results show that： Under the conditions of m （DMC） ： m （AM） = 0.18, initiator dosage 0.5 % （mass fraction）, polymerization reaction time 3 h and polymerization solution pH 4.0, the intrinsic viscosity of P（DMC- AM） is the best; When the dosage of nano-TiO2 is 5%, P（DMC-AM）/TiO2 composite flocculant has the best decolorization capacity to the simulated dye wastewater containing acidic black 10B.