常见二元表面活性剂复配体系对发泡能力的影响  

Influence of Common Surfactant Binary Composite System on Foamability

作　　者：轩宇宁 倪晓芳 余锦涛 XUAN Yuning;NI Xiaofang;YU Jintao(Shanghai Research Institute of Chemical Industry Co.Ltd,Shanghai 200062,China;Shanghai Institute of Chemical Industry Environmental Engineering Co.Ltd,Shanghai 200062,China)

机构地区：[1]上海化工研究院有限公司,上海200062 [2]上海化工院环境工程有限公司,上海200062

出　　处：《华东理工大学学报（自然科学版）》2022年第4期449-455,共7页Journal of East China University of Science and Technology

基　　金：上海市优秀学术/技术带头人计划(21XD1432400)。

摘　　要：使用阴离子表面活性剂十二烷基苯磺酸钠(SDBS)、十二烷基硫酸钠(SLS)、N-月桂酰肌氨酸钠(NLSS)、十二烷基磺酸钠(SDS),两性离子表面活性剂椰油酰胺丙烯甜菜碱(CAB),以及非离子表面活性剂脂肪醇聚氧乙烯醚(AEO)、吐温20(T20)进行二元表面活性剂的复配实验,表征其发泡性能并计算相应的表面活性参数,探究了二元表面活性剂复配的相互作用对发泡能力的影响。结果表明,阴离子与两性离子表面活性剂在复配过程中,物质的量之比接近1∶1时发生聚沉现象;拥有直链疏水基的表面活性剂与亲水基较大的非离子表面活性剂复配时会发生竞争吸附,削弱表面活性剂的发泡能力;拥有相似结构的阴离子表面活性剂复配时能够产生协同效应,SDBS和NLSS物质的量之比为7∶3时发泡能力最佳,对应的最高发泡倍数为14.0,发泡性能最好,二者相互作用参数β^(m)=-9.83(x^(m)_(SDBS)=0.4),协同效应最佳,吉布斯自由能为ΔG_(m)^(0)=-13.60 kJ/mol,胶束形成为自发过程。Anionic surfactant-sodium dodecyl benzene sulfonate(SDBS),sodium lauryl sulfate(SLS),sodium Nlauroyl sarcosinate(NLSS),sodium dodecyl sulfonate(SDS),zwitterionic surfactant-cocoamide propylene betaine(CAB),and non-ionic surfactant-fatty alcohol polyoxyethylene ether(AEO),Tween 20(T20)had been used for combination experiment in binary surfactant systems.Foamability which defined by the ratio of foam volume and initial liquid volume had been characterized as well as the relevant surface activity parameters such as interaction parameter(β^(m)),the mole fraction in micelle and surface,and the Gibbs free energy(ΔG_(m)^(0)).Further exploration was performed to evaluate the effect of the interaction of the binary surfactant mixture on the foamability.The results showed that during the combination process of anionic and zwitterionic surfactants,coagulation occurred when the molar concentration ratio closing to 1∶1.When the surfactant with linear hydrophobic group and the nonionic surface with larger hydrophilic group were mixed,competitive adsorption occurred,which weakened the foamability of the surfactant.Synergistic effects could be produced when anionic surfactants with similar structures were compounded.The mixture of sodium dodecylbenzene sulfonate(SDBS)and sodium lauroyl sarcosinate(NLSS)has the best foaming performance when the molar concentration ratio was 7∶3,which had the best foam quality(Q=14.0).The interaction parameter wasβ=-9.83(x^(m)_(SDBS)=0.4)calculated by the theory of synergy,which had a strong synergistic effect.The Gibbs free energy isΔG_(m)^(0)=-13.60 kJ/mol,proving that the formation of micelles was a spontaneous process.

关 键 词：表面活性剂 协同效应 二元表面活性剂复配 发泡性能 

分 类 号：TQ423.94[化学工程]