不同结构表面活性剂在有机非水相中的发泡性能研究

doi:10.3969/j.issn.1001-1803.2019.07.003

摘要/Abstract

摘要：

研究不同有机非水相溶剂在不同结构类型表面活性剂作用下的起泡性能。利用泡沫衰减法测定不同有机非水相溶液体系的发泡体积和泡沫稳定性,并分析其表面张力、黏度、溶剂极性对有机非水相溶液体系起泡性能的影响。结果表明,无论阴离子、非离子,还是两性表面活性剂在正构烷烃和芳香烃溶剂中均不起泡,只有部分在液体石蜡和甘油中产生泡沫。液体石蜡和甘油中所形成的泡沫含气率分别为66.6%~83.3%和72.2%~83.7%,半衰期分别为0.21~1.44 min和1.79~16.69 min,其中发泡剂AEO-3和OBS分别在液体石蜡和甘油溶剂中发泡性能较佳。研究发现有机非水相溶剂极性越大,其溶液起泡性能愈佳;而有机非水相表面活性剂溶液黏度仅与泡沫稳定性有关,非水相溶液体系表面张力的降低与其发泡性能之间未能展现出密切的关联。

关键词: 表面活性剂, 有机非水相溶剂, 溶剂极性, 起泡性能, 稳定性

Abstract:

The foaming properties for various organic solvents in the presence of surfactants with diverse structure were investigated. The foam volume and foam stability were determined by a foam attenuation method. The effects of surface tension, viscosity and solvent polarity on foaming properties were also analyzed. The experimental results showed that the anionic, nonionic and amphoteric surfactants under investigation could not produce foams in n-alkanes and aromatic hydrocarbons, while some of them only form foams in liquid paraffin and glycerin. The volume fractions of gas in foams for liquid paraffin and glycerin range from 66.6% to 83.3% and 72.2% to 83.7%, respectively, while the half-lives range from 0.21 to 1.44 min and 1.79 to 16.69 min, respectively. The best foaming agents are AEO-3 for liquid paraffin and OBS for glycerin. It can be concluded that the greater the polarity of the organic solvent, the better is its foaming capacity. The viscosity is only related to the stability of the foam formed from these solutions, and it is found that the decrease of surface tension of the non-aqueous solutions is not closely related to its foaming performance.

Key words: surfactant, non-aqueous solvent, solvent polarity, foaming properties, stability

中图分类号:

TQ423

燕永利. 不同结构表面活性剂在有机非水相中的发泡性能研究[J]. 日用化学工业, 2019, 49(7): 435-440.

YAN Yong-Li. Investigation on the foaming properties of surfactants with different structure in organic solvents[J]. China Surfactant Detergent & Cosmetics, 2019, 49(7): 435-440.

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起泡剂	AEO-3	BS-12	SDS
η/（mPa·s）	22.8	22.3	22.0
泡沫含气率/%	72.0	77.7	76.7
半衰期/min	0.63	0.62	0.52

起泡剂	SDS	BS-12	AEO-3
η/（mPa·s）	913.0	906.4	895.2
泡沫含气率/%	71.8	75.9	69.2
半衰期/min	15.09	6.70	1.90

溶剂	正辛烷	正癸烷	正十二烷	苯	甲苯	二甲苯	液体石蜡	甘油
介电常数	2	2	2	1.0~2.3	2.4	2.3~2.4	1.9~2.5	47~68
发泡性能	无	无	无	无	无	无	有	稳定泡沫