日用化学工业（中英文）2023，Vol.53Issue(7)：733-741,9.DOI:10.3969/j.issn.2097-2806.2023.07.001
无机盐KCl对离子型表面活性剂泡沫演化规律研究
Study on the influence of KCl on the evolution of foam of an anionic surfactant
摘要
Abstract
Foams are widely used in many fields,such as food,cosmetics,medicine,and mineral flotation.The addition of inorganic salts to ionic surfactants will affect the adsorption of surfactants at the air-liquid interface and the solubility of surfactants in solution,thus influencing the evolution of foams.At present,the influences of salts on the evolution of foams of ionic surfactants are still not clear.In this work,the influence of potassium chloride(KCl)on the evolution of foam of sodium dodecyl sulfate(SDS)in the low concentration range was systematically studied.It was found that,when the concentrations of salt and surfactant were both low,the stability of the foam prepared was similar to that without salt,in which the foam was stabilized by surfactant molecules;when the concentrations of salt and surfactant were both increased and their concentrations were close to each other,the salt promoted the adsorption and crystallization of surfactant molecules at the air-liquid interface due to electrostatic interaction,making the stability of foam better than that of pure surfactant,in which the foam was stabilized by inorganic-salt enhanced surfactant molecules;when the salt concentration was slightly higher than the surfactant concentration,the surfactant crystal particles adsorbed on the network of foam,and the local crystals destroyed the liquid film of foam,thus making the foam unstable,in which the foam was stabilized by surfactant molecules under the interference of surfactant crystals;when the salt concentration was further increased,the surfactant crystal particles completely covered on the air-liquid interface of foam,and ultra-stable Pickering foam was obtained by forming solid particle barrier.This research work might have important theoretical guiding significance for further exploring the evolution theory of foams stabilized by surfactant crystal particles and their applications in related fields.关键词
盐效应/十二烷基硫酸钠/泡沫演化/表面活性剂晶体Key words
salt effect/SDS/foam evolution/surfactant crystal分类
化学化工引用本文复制引用
强学峰,张莉,郑斌,侯倩倩,燕坤..无机盐KCl对离子型表面活性剂泡沫演化规律研究[J].日用化学工业（中英文）,2023,53(7):733-741,9.基金项目
国家自然科学基金资助项目(22002116) （22002116）
陕西省教育厅自然专项资助项目(20JK0770) （20JK0770）
