大象牙膏实验喷射成形影响因素研究

Study on Parameters Enabling Jetting and Shaping Elephants' Toothpaste

作为最具观赏性的化学实验之一,"大象牙膏"目前多数不能成形且喷射无力.系统的反应条件优化表明,过氧化氢质量分数、催化剂类别和用量、发泡剂类别和用量,以及反应容器等因素共同决定"大象牙膏"实验能否喷射成形.研究结果显示,使用质量分数为50%的H2O2(50 m L),KI(7.47 g,溶于15 m L水),洗洁精(12 m L),食用色素(5滴)的组合能够得到炫彩夺目、喷射力强且成形的"大象牙膏".

Considered as one of the most amazing chemical experiments,＂Elephants＇ Toothpaste＂was infrequently presented as a jet with good shape. Systematic optimization of reaction conditions showed that the mass fraction of hydrogen peroxide,the catalyst and its loading,the foaming agent and its dosage,and the reaction vessel all exert significant effects on the gushing and shaping of the＂Elephants＇ Toothpaste＂. The result showed that the combination of 50% H2 O2（ 50 m L）,KI（ 7. 47 g,dissolved in 15 m L water）,dishwashing liquid（ 12 m L）,and food coloring（ 5 drops） permits the formation of colored and well-shaped ＂Elephants＇ Toothpaste＂gusher.