Rheological behavior and physico-chemical properties of cetyltrimethylammonium salicylate in aqueous solutions

Study on rheology and thermal stability of mixed (nonionic–anionic) surfactant based fracturing fluids

“…It was noted that G′ presented about one order of magnitude higher than G″ throughout the whole frequency range (0.01–10 rad/s) indicating the presence of lamellar liquid crystal in the VES fluids . These fluids tend to be more elastic than viscous in the range of frequency being investigated, representing the gel like behavior . No crossover point was detected between the G′ and G″ in the frequency range studied, which confirms the presence of lamellar liquid crystals …”

“…Surfactants consist of a hydrophilic head and a hydrophobic tail, that have found applications in almost all chemical industries including detergent, petroleum, pharmaceutical, food, textile, pesticide, etc. where they are used as dispersants/emulsifying/wetting/foaming/solubilising agents, for rheology control and surface modification . Whenever the surfactant concentration is above a certain critical micelle concentration (CMC) in an aqueous medium of oil and water, the amphiphilic molecules can form a variety of micro‐structures such as spherical micelles, wormlike micelles, vesicles, hexagonal, and lamellar liquid crystals .…”

Molecular characteristics and rheological properties of water-extractable polysaccharides derived from okra (Abelmoschus esculentus L.)

“…The rheology was measured on a stress-controlled rheometer (AR2000ex, TA Instruments, USA) with cone-plate geometry. [25] The cone is made of standard ETC steel with a cone diameter of 20 mm and cone angle of 2°. A steady flow process (0.01-1000 s −1 ) was used to determine the rheological properties at 25°C.…”

Rheological properties of photo-responsive system composed of cationic surfactant and azobenzene

“…本课题组 [19] 课题组 [19] 的晶体结构测定得知, 溶液中两个Sal 为顺式(cis)-AZB存在时的吸收光谱 [20] . 光照2 h后, 2 个吸收峰高度不再改变, 但吸收峰稍有蓝移, 431 nm 处的吸收峰更加明显, 可以认为trans-AZB大部分转 化为顺式结构.…”