摘要
利用稳态和动态剪切实验考察了功能化Gemini表面活性剂1,3双-(二羟乙基十二烷基溴化铵)-丙烷[简写为12(2OH)-3-12(2OH)·2Br]与传统阴离子表面活性剂(十二酸钠、十四酸钠和十六酸钠)混合体系在25℃下的流变性质。12(2OH)-3-12(2OH)·2Br的浓度为50 mmol/L时,十二酸钠、十四酸钠和十六酸钠均可以增强溶液的黏弹性。十二酸钠与12(2OH)-3-12(2OH)·2Br的混合摩尔比β为0.3时,溶液的零剪切黏度η0出现最大值,为12.35 Pa·s,平台模量G'∞为31.88 Pa;β=0.4时,G'∞值为14.67 Pa。混合体系的黏弹性顺序为:十二酸钠/12(2OH)-3-12(2OH)·2Br>十四酸钠/12(2OH)-3-12(2OH)·2Br>十六酸钠/12(2OH)-3-12(2OH)·2Br。改变12(2OH)-3-12(2OH)·2Br的浓度到60 mmol/L且十二酸钠/12(2OH)-3-12(2OH)·2Br的混合摩尔比β为0.3时,零剪切黏度η0和平台模量G'∞均增大,分别为33.92 Pa·s和46.41 Pa。
The rheological properties of functional Gemini surfactant propanediyl-1, 3-bis( dihydroxylethyldodecylammonium bromide) 〔12( 2OH)-3-12( 2OH) ·2Br〕in the presence of small amount of traditional carboxylate surfactant,sodium laurate( SL),sodium myristate( SM) and sodium palmitate( SP),respectively,were investigated by steady state and dynamic rheological measurements at25 ℃. It was found that the addition of small amount of anionic surfactants has an obvious effect on the viscoelasticity of 12( 2OH)-3-12( 2OH) ·2Br solutions. The molar ratio( β) of anionic surfactant to cationic surfactant in the mixed solution was 0. 3,the zero shear viscosity got a maximum,12. 35 Pa·s,and the G'∞was 31. 88 Pa. When β = 0. 4,G'∞was 14. 67 Pa. The sequence of solution viscoelasticity was SL /12( 2OH)-3-12( 2OH) ·2Br〉 SM /12( 2OH)-3-12( 2OH) ·2Br 〉SP /12( 2OH)-3-12( 2OH) ·2Br. When the concentration of 12( 2OH)-3-12( 2OH) ·2Br was 60 mmol/L,the zero shear viscosity was 33. 92 Pa·s and G'∞was 46. 41 Pa,respectively,in the mixtures of SL /12( 2OH)-3-12( 2OH) ·2Br where β was 0. 3.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2015年第6期620-625,666,共7页
Fine Chemicals
基金
国家自然科学基金(21203078)
中央高校基本科研业务费专项资金(JUSRP111A06)~~