不同结构三取代烷基苯磺酸钠表、界面的扩张性质  

Dilational Properties of Tri-substituent Sodium Alkyl Benzene Sulfonates with Different Structures at the Air/Water and Decane/Water Interfaces

作　　者：张磊[1] 王晓春 宫清涛[1] 罗澜[1] 张路[1] 赵濉[1] 俞稼镛[1] 

机构地区：[1]中国科学院理化技术研究所,北京100080

出　　处：《物理化学学报》2007年第12期1881-1885,共5页Acta Physico-Chimica Sinica

摘　　要：利用悬挂滴方法研究了两种同分异构体的表面活性剂2-丙基-4,5-二己基苯磺酸钠(366)和2,5-二丙基-4-壬基苯磺酸钠(393)在空气/水表面和癸烷/水界面上的扩张流变性质,考察了不同表面活性剂浓度下366和393溶液表、界面扩张性质的异同.实验结果表明,磺酸根间位的长链烷基对表面扩张模量贡献较大,表面活性剂分子大小对界面扩张模量影响较大.The dilational rheological properties of a pair of structural isomers：sodium 2-propyl-4,5-dihexyl benzene sulfonate（366）and sodium 2,5-dipropyl-4-nonyl benzene sulfonate（393）at the air/water and decane/water interfaces were investigated by drop shape analysis method.The influences of concentration on dilational modulus were expounded.The experimental results showed that the 5-alkyl played an important role in the surface dilational modulus,while the dimension of surfactant molecule dominated the interfacial dilatinal modulus.

关 键 词：烷基苯磺酸盐 表面 界面 扩张模量 

分 类 号：O647.1[理学—物理化学]