疏水碳链长度对胺类捕收剂起泡性能的影响研究

Effect of Hydrophobic Carbon Chain Length on Properties of Monoamine Collector Foaming Abilities

为了研究疏水碳链中碳原子数目对胺类捕收剂起泡性能的影响,采用充气法对十二胺、十四胺和十六胺产生的泡沫体积、泡沫半衰期和泡沫大小分布等参数进行了测量。结果表明:在溶液p H=6.0时,具有最大发泡体积的捕收剂种类由高到低依次是十四胺>十六胺>十二胺;在药剂用量均为1.0 g/L时,起泡能力由强到弱为十四胺>十六胺>十二胺;随着捕收剂疏水碳链中碳原子数的增加,分子间的相互作用增强,溶液黏度增大,泡沫半衰期也大幅增加,t1/2由高到低依次是十六胺>十四胺>十二胺;气泡索特直径达到最小值时的药剂用量由低到高依次为十六胺<十四胺<十二胺;胺类捕收剂中疏水碳链越长,其最大发泡体积和CCC也更容易在低浓度下达到,在试验药剂用量范围内,药剂溶液黏度由低到高依次为:十二胺<十四胺<十六胺,药剂溶液黏度越大,产生的泡沫稳定性越好。

In order to study the effect of the number of carbon atoms in the hydrophobic carbon chain on the perfor?mance of the amine collector foaming ability,the aeration method was used to capture the foam volume of dodecylamine,tetra?decylamine and hexadecylamine. The parameters such as foam half-life and foam size distribution were also measured. The re?sults show that the order of the agents has biggest foam volume at pH=6.0 from high to low is tetradecylamine>hexadecylam?ine>dodecylamine. As the number of carbon atoms in the hydrophobic carbon chain increases,the interaction between the molecules increases,and the viscosity of the solution increases,so that the half-life of the foam is also greatly increased. The order of t1/2 from large to small is hexadecylamine>tetradecylamine>dodecylamine. When the foam Sauter diameter reach the minimum number,the dosage of agents from low to high is tetradecylamine<hexadecylamine<dodecylamine. With the in?crease of the number of chain carbon atoms,the maximum foam volume and critical micelle concentration(CMC) of the amine collector solution is easy to reach at low concentration. The viscosity of the agent solution from low to high is: dodecylamine<tetradylamine<hexadecylamine,the greater the viscosity of the agent solution,the better the foam stability.