Control of viscoelasticity using redox reaction
Control of viscoelasticity using redox reaction
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DOI：
10.1021/ja0467162
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发表时间：
2004-10-06
影响因子：
15
通讯作者：
Abe, M
中科院分区：
文献类型：
--
作者：
Tsuchiya, K;Orihara, Y;Abe, M
（11-二茂铁酰十一烷基）三甲基溴化铵（FTMA）的法拉第反应调节了流体的粘弹性，FTMA是一种“可氧化还原”的表面活性剂。在水杨酸钠（鼻）存在的情况下，还原形式的FTMA水溶液表现出显著的粘弹性，因为形成了三维缠结的虫状胶束。电解氧化FTMA导致体系粘度急剧下降，弹性消失。粘弹性的急剧下降是由于蠕虫状胶束的破坏。这种新颖的电流变现象有望应用于喷墨打印机的油墨，电化学控制释放被困在虫状胶束中的物质，以及利用电信号控制流体流速。
The viscoelasticity of a fluid was tuned with the Faradaic reaction of (11-ferrocenylundecyl)trimethylammonium bromide (FTMA), a “redox-switchable” surfactant. An aqueous solution of the reduced form of FTMA exhibited a remarkable viscoelasticity in the presence of sodium salicylate (NaSal) because of the formation of three-dimensional entanglement of wormlike micelles. Electrolytic oxidation of FTMA caused the viscosity of the system to dramatically decrease and the elasticity to disappear. This drastic decrease in viscoelasticity arose from the disruption of wormlike micelles. This novel electrorheological phenomenon is expected to be applicable to ink for inkjet printers, the electrochemically controlled release of substances entrapped in wormlike micelles of FTMA, and fluid flow rate control using electric signals.