Formation and Disruption of Viscoelastic Wormlike Micellar Networks in the Mixed Surfactant Systems of Sucrose Alkanoate and Polyoxyethylene Alkyl Ether
Formation and Disruption of Viscoelastic Wormlike Micellar Networks in the Mixed Surfactant Systems of Sucrose Alkanoate and Polyoxyethylene Alkyl Ether
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DOI：
10.1021/jp048716u
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发表时间：
2004-08
影响因子：
3.3
通讯作者：
A. Maestro;Durga P. Acharya;H. Furukawa;J. M. Gutiérrez;M. López‐Quintela;and Masahiko Ishitobi;H. Kunieda
中科院分区：
文献类型：
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作者：
A. Maestro;Durga P. Acharya;H. Furukawa;J. M. Gutiérrez;M. López‐Quintela;and Masahiko Ishitobi;H. Kunieda
在蔗糖十六酸盐(P1695)的稀胶束溶液中加入亲油性非离子两亲化合物，如短链聚氧乙烯十二烷基醚(C12EOn，n=1−4)和单月桂酯(ML)，粘度急剧增加，这归因于一维胶束的生长。随着非离子的连续加入，粘度逐渐降低，最终发生相分离。在混合体系的最大粘度区域，得到了具有蠕虫状胶束交织网络的典型流变性的粘弹性溶液。在低剪切频率范围内，体系的振荡剪切行为可用Maxwell模型描述。亲脂性非离子在混合体系中诱导胶束生长的能力按如下顺序递减：ML≈C12EO1≈C12EO2<；C12E03<；C12EO4。在十二酸蔗糖(SM1200)/C16E的水体系中也观察到类似的亲水基团的作用，尽管胶束的生长速度较快.
Addition of lipophilic nonionic amphiphiles, such as short EO-chain polyoxyethylene dodecyl ether (C12EOn, n = 1−4) and monolaurin (ML), to the dilute micellar solution of sucrose hexadecanoate (P1695) induces a sharp increase in viscosity that is attributed to the one-dimensional micellar growth. With successive addition of the nonionics, the viscosity gradually decreases and, eventually, a phase separation occurs. In the maximum-viscosity region of the mixed systems, a viscoelastic solution with a rheological behavior typical of the interwoven network of wormlike micelles is obtained. The oscillatory shear behavior of the systems can be described by the Maxwellian model in the region of low shear frequency. The ability of the lipophilic nonionics to induce micellar growth in the mixed system decreases in the following order: ML ≈ C12EO1 ≈ C12EO2 < C12EO3 < C12EO4. A similar effect of the hydropilic group is observed in the sucrose dodecanoate (SM1200)/C16EOn aqueous system, although the micellar growth...