Small angle neutron scattering study of two nonionic surfactants in water micellar solutions

Pramana

Rajewska Aldona1¹ 

[1] Institute of Atomic Energy, 05-400 Swierk-Otwock, Poland$$

关键词: Small angle neutron scattering;    complex fluids;    aggregation of nonionic classic surfactants.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Two classic nonionic surfactants – C14E7 (heptaethylene glycol monotetra-decyl ether) and C10E7 (heptaethylene glycol monodecyl ether) were investigated in heavy water solution for concentration 𝑐 = 0.17% (dilute regime) at different temperatures in the range 𝑡 = 10–35°C by small angle neutron scattering (SANS) method. In the case of C14E7 surfactant – for all temperatures at 𝑐 = 0.17% there are two axial ellipsoidal micelles with longer axis 15 nm at 10°C and 49.5 nm at 35°C in investigated solutions. For C10E7 surfactant at the same concentration of solution and temperature – two axial ellipsoidal micelles were observed, too. The longer axis is equal to 7.5 nm at 10°C, 9 nm at 20°C and at 35°C this axis is equal to 12 nm. Micelles of C10E7 nonionic surfactant are smaller than those of C14E7 surfactant in the same experimental conditions.

【 授权许可】

Unknown