Department of Chemistry, University of Calabria, P. Bucci 14C, 87036 Rende, Italy.
J Colloid Interface Sci. 2012 Apr 15;372(1):32-9. doi: 10.1016/j.jcis.2012.01.027. Epub 2012 Jan 24.
In this study, we investigate structural transitions of tetraethylene glycol monohexadecyl ether (C(16)E(4)) in D(2)O as a function of shear flow and temperature. Via a combination of rheology, rheo-small-angle neutron scattering and rheo-small-angle light scattering, we probe the structural evolution of the system with respect to shear and temperature. Multi-lamellar vesicles, planar lamellae, and a sponge phase were found to compete as a function of shear rate and temperature, with the sponge phase involving the formation of a new transient lamellar phase with a larger spacing, coexisting with the preceding lamellar phase within a narrow temperature-time range. The shear flow behavior of C(16)E(4) is also found to deviate from other nonionic surfactants with shorter alkyl chains (C(10)E(3) and C(12)E(4)), resembling to the C(16)E(7) case, of longer chain.
在这项研究中，我们研究了四乙二醇单十六醚（C（16）E（4））在 D（2）O 中作为剪切流和温度函数的结构转变。通过流变学、流变小角中子散射和流变小角光散射的结合，我们探测了系统相对于剪切和温度的结构演变。多层囊泡、平面层和海绵相被发现随着剪切速率和温度的变化而竞争，其中海绵相涉及形成具有较大间距的新瞬态层相，与前面的层相在狭窄的温度-时间范围内共存。还发现 C（16）E（4）的剪切流行为偏离了具有较短烷基链的其他非离子表面活性剂（C（10）E（3）和 C（12）E（4）），类似于具有更长链的 C（16）E（7）情况。
