作　　者： ; ; ; ; (杨中强）;

机构地区： 山东大学化学与化工学院

出　　处： 《石油沥青》 2014年第2期6-14,共9页

摘　　要： 以碱木质素、四乙烯五胺、甲醛经一步反应合成出一种新型沥青乳化剂四乙烯五胺/甲醛改性木质素胺。确定了最佳反应条件为:32 g木质素,0.1 mol四乙烯五胺,氢氧化钠与木质素的质量比2.15%,甲醛与四乙烯五胺的摩尔比2.0,反应温度80℃,反应时间2.5 h。最佳工艺条件下转化率可达50.88%。利用红外光谱对产物结构进行了表征,利用在线红外光谱技术对合成四乙烯五胺/甲醛改性木质素胺的反应进行追踪分析,检测出中间体。基于以上试验数据,提出了合理的反应机理。最终产物具有较好的表面活性。该乳化剂对沥青具有很好的乳化能力,制备的乳化沥青储存稳定性良好,属于慢裂型沥青乳化荆。 A novel cationic asphalt emulsifier of tetraethylenepentamine/formaldehyde modified lignin a- mine was synthesized by alkali lignin, tetraethylenepentamine and formaldehyde. The optimum reaction condi- tion was obtained. The yield reaches 50. 88% at the optimum conditions of the amount of lignin 32 g, the a- mount of tetraethylenepentamine 0. 1 mol, mass ratio of NaOH to lignin 2. 15% , feedstock mole ratio of form- aldehyde to tetraethylenepentamine 2. 0, reaction temperature 80 ~C, and reaction time 2. 5 h. The structure of the emulsifier was identified by FTIR. The synthesis process was monitored by online FTIR technique and the intermediate was detected. Based upon the experimental data, a reasonable reaction mechanism was proposed for the reaction. The target product had good surface activity and satisfactory emulsification effect. The prepared asphalt emulsion showed higher storage stability. The emulsifier belonged to slow - set asphalt emulsifier.

关 键 词： 沥青 乳化剂 木质素 四乙烯五胺 在线红外

领　　域： [化学工程]