日用化学工业（中英文）2024，Vol.54Issue(1)：16-23,8.DOI:10.3969/j.issn.2097-2806.2024.01.002
硬脂酸酯双子季铵盐的合成及性能研究
Synthesis and properties of Gemini quaternary ammonium surfactant based on stearate
摘要
Abstract
A Gemini quaternary ammonium surfactant based on stearate(EG-18)was synthesized from stearic acid,N,N-dimethylethanolamine and 1,4-dibromobutane.EG-18 was characterized by IR and 1H NMR.The surface activity of EG-18 was studied by measuring the static surface tension and dynamic surface tension.The critical micelle concentration(cmc)of EG-18 was 1.32×10-3 mol/L,and the equilibrium surface tension at cmc(γcmc)was 35.68 mN/m.The results of dynamic surface tension vs.time showed that,when the concentration of EG-18 solution was as low as 1×10-5 mol/L,only induction region could be found in the curve,and the fast fall region and meso-equilibrium region would gradually appear with the increase of concentration.Equilibrium region was not founded at higher concentration(e.g.,1×10-2 mol/L)of EG-18 solution,due to the high steric hindrance of the Gemini surfactant,which hindered the rate of migration to the liquid surface.The results of dynamic contact angle showed that,the contact angle of EG-18 solution decreased with the increase of concentration,i.e.,the wetting effect of EG-18 solution on paraffin film increased.The differences between EG-18,D1821 and esterquat in wetting ability,turbidity,antistatic properties,softness and fabric whiteness were studied.The results showed that EG-18 had the highest solubility among the three.EG-18 had certain wetting ability to paraffin film,but its wetting ability was weaker than that of D1821 and esterquat.The antistatic performance of EG-18 was stronger than that of D1821.In terms of softness,the softening properties of the three substances were basically the same,and compared with the blank control group,the white cotton cloth was significantly softened.EG-18 had the least influence on the whiteness of white cotton cloth.关键词
双子表面活性剂/硬脂酸酯/季铵盐/合成与表征Key words
Gemini surfactant/stearate/quaternary ammonium salt/synthesis and characterization分类
化学工程引用本文复制引用
艾浩康,姜亚洁,王亚魁,张璐,耿涛..硬脂酸酯双子季铵盐的合成及性能研究[J].日用化学工业（中英文）,2024,54(1):16-23,8.基金项目
山西省专利转化专项计划(202201027) （202201027）
伽蓝研究基金资助(JALA2021) （JALA2021）
中国轻工集团有限公司科技创新基金项目(ZQ2022YY05) （ZQ2022YY05）
