脂肪醇聚氧乙烯醚硫酸钠黏弹性胶束及其流变与破胶性能  

Studies on the rheological and breaking behaviors of viscoelastic micelles of fatty alcohol polyoxyethylene ether sulfate

作　　者：李楷 刘会强 李建山 陆红军 顾雪凡[2] 燕永利[2] 

机构地区：[1]中国石油股份有限公司长庆油田分公司超低渗透油藏研究中心,陕西西安710018 [2]西安石油大学化学化工学院,陕西西安710065

出　　处：《日用化学工业》2014年第6期306-311,共6页China Surfactant Detergent & Cosmetics

基　　金：陕西省自然科学研究计划资助项目(2014JM2048);陕西省教育厅自然科学研究计划资助项目(2013JK0675;2013JK0649)

摘　　要：采用阴离子表面活性剂脂肪醇聚氧乙烯醚硫酸钠(AES)与NaCl制备黏弹性胶束。采用流变仪、黏度计和冷冻断裂蚀刻透射电子显微镜(FF-TEM),研究了在不同浓度条件下AES与NaCl溶液形成胶束体系的微观结构、流变性能、破胶机理以及重复利用性能。通过对溶液剪切黏度、剪切应力、动态模量、复合黏度等物理量的测量,结合体系宏观挑挂照片和微观FF-TEM分析,发现该体系在较宽的频率范围内呈现蠕虫状网状结构和优良的流变性能。NaCl对蠕虫状胶束的形成有很大影响,在一定的范围内随着NaCl浓度的增大,体系黏度显著增大;通过内相破胶剂实现了体系破胶可控性的目的,破胶后体系表现出分散均一的颗粒状,该体系具有重复利用的可行性。Microstructure, rheological performance, breaking mechanism and recycling performance of the viscoelastic micelles prepared from anionic surfactant fatty alcohol polyoxyethylene ether sulfate （AES） and sodium chloride （NaC1） were investigated using the rheometer, viscometer and freeze fracture transmission electron microscopy （FF- TEM）. Via measurement of physical quantities of the surfactant solution, such as shearing viscosity, shearing stress, dynamic modules, eomposited viscosity et al,in combination with analysis of observations from macroscopic photos and microscopic FF - TEM images, it were discovered that the micelle system shows overlapping network structure displaying good viscoelasticity. NaC1 has a great impact on the formation of wormlike micelles. With the increase of NaC1 concentration within a certain range, the viscosity significantly increases. The broken mieelle system exhibits well - distributed droplets and could be utilized for micelle breaking through adding internal phase breaker. Reuse of the system is feasible.

关 键 词：阴离子表面活性剂 蠕虫状胶束 流变性 破胶 

分 类 号：O648.1[理学—物理化学]