摘要
为丰富和发展表面活性剂减阻体系,研究了阳离子Gemini表面活性剂丙撑基双(十八烷基二甲基氯化铵)(18-3-18)与水杨酸钠(NaSal)组成的新型胶束体系的流变和减阻性能。考察了不同浓度胶束体系的流变特性,讨论了该胶束体系的摩擦阻力系数和减阻率随广义雷诺数的变化关系,并比较了在光滑管及粗糙管中该体系的减阻效果。结果表明,18-3-18/NaSal胶束体系具有良好的黏弹性、触变性和剪切变稀性。随胶束体系浓度增大,减阻效果提高。对18-3-18/NaSal(5 mmol L 1/10 mmol L 1)胶束减阻体系,存在临界广义雷诺数,最大减阻率为78.5%;对18-3-18/NaSal(7.5mmol L 1/15 mmol L 1,10 mmol L 1/20 mmol L 1)胶束体系在光滑管中的最大减阻率可分别达到82.3%和81.7%。该胶束体系在光滑管中的减阻效果优于粗糙管中的减阻效果,表明18-3-18/NaSal胶束是一种新型减阻胶束体系。
In order to enrich and develop the surfactant drag reduction systems,the rheologic and drag reduction properties of novel micelle systems formed by cationic Gemini 18-3-18 and sodium salicylate（NaSal） with different concentrations were investigated.The relationship between Fanning friction factor,drag reduction percentage and generalized Reynolds number of the micelle systems was discussed respectively.The drag reduction behaviors of the micelle systems in the smooth pipe and rough pipe were discussed and compared.The results show that the Gemini 18-3-18/NaSal micelle systems possess good viscoelasticity,thixotropy and shear-thinning property and the drag reducing effectiveness improves with the increase of the micelle concentrations.There exists a critical generalized Reynolds number for 18-3-18/NaSal（5 mmol.L.1/10 mmol.L.1） micelle,and its maximum drag reduction percentage reaches 78.5%.Furthermore,the maximum drag reduction percentages for 18-3-18/NaSal micelles（7.5 mmol.L.1/15 mmol.L.1,10 mmol.L.1/20 mmol.L.1） in smooth pipe are 82.3% and 81.7%,respectively.The drag-reduction effect of the micelle systems in smooth pipe is better than that in the rough pipe.18-3-18/NaSal micelle system was proved to be a novel drag reducing micelle system.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2013年第1期18-23,共6页
Journal of Chemical Engineering of Chinese Universities
