球形三甲基木质素季铵盐的制备与絮凝性能分析

Preparation of sphere trimethyl quaternary ammonium salt based on lignin and study on its flocculation performance

以三甲基木质素季铵盐为原料,司盘60为分散剂,甲醛为交联剂,用反相悬浮法合成了球形三甲基木质素季铵盐,再用激光粒度仪、扫描电镜和红外光谱仪对其进行表征,并以酸性黑ATT为模型物,考察了球形三甲基木质素季铵盐对酸性染料的絮凝性能。结果表明:合成球形三甲基木质素季铵盐的最佳实验条件为分散剂司盘60用量2.5%、甲醛质量分数11%、反应时间1h、搅拌速度100r/min;产物平均粒径为0.161mm;在pH值1～2的条件下,球形三甲基木质素季铵盐对酸性黑ATT染料溶液脱色率为94.09%,而三甲基木质素季铵盐絮凝在最佳pH值3～4时脱色率为78.82%;球形三甲基木质素季铵盐对质量浓度0.1g/L酸性黑ATT的最佳投加量为0.1g,而三甲基木质素季铵盐为0.3g。

Sphere trimethyl quaternary ammonium sah based on lignin was prepared by reversed phase suspension polymerization technique with trimethyl quaternary ammonium salt based on lignin as raw material, and the dispersing agent was Span 60. Its structure was determined by Laser Particle Sizer, scanning electron microscopy （SEM） and Fourier transform infrared spectrometry （FTIR）. The effects of sphere trimethyl quaternary ammonium salt based on lignin on the flocculation performance of acid dyes were investigated with acid black ATT water as the simulate dye. The results showed that the optimum conditions obtained by orthogonal experiments were Span 60 dosage 2.5% , reaction time 1 hour, stirring speed 100 r/min, formaldehyde dosage 11%. The average particle size of the product was 0. 161 mm. The decolonization rate of sphere trimethyl quaternary ammonium salt based on lignin was 94.09% at pH of 1-2, while trimethyl quaternary ammonium salt based on lignin was 78.82% at pH of 3-4 ; when the acid black ATT was 0.1 g/L, the best dosage of sphere trimethyl quaternary ammonium salt based on lignin was 0. 1 g, while the trimethyl quaternary ammonium salt based on lignin was 0.3 g.