酸碱-氧化还原双重刺激响应型表面活性剂的合成与性能

以11-氨基十一酸为原料制备了酸碱-氧化还原双重刺激响应型表面活性剂中间体11-叔胺十一烷基羰基二茂铁(C_(11)-N-Fe);采用~1H NMR和MS等手段对产物进行了结构表征;并通过透光率、循环伏安法和紫外光谱分析等研究了其酸/碱和氧化/还原开关响应性能.研究发现,C_(11)-N-Fe的盐酸盐在水溶液中进行自组装时,可制备具有酸碱-氧化还原双重刺激响应性的泡沫,且采用2种刺激方式的消泡均可在2 min之内完成;将C_(11)-N-Fe的盐酸盐作为乳化剂用于乳化正癸烷/水体系,可以制得颗粒均匀稳定的乳状液,同时可以通过酸碱-氧化还原双重刺激可逆调控乳液的稳定与破乳.

Synthesis and Properties of pH and Redox Dual-switchable Surfactant

A new dual-stimuli responsive surfactant intermediate 11-tertiary aminehendecyl-carbonyl-ferroce-nyl( C11-N-Fe) was synthesized. The structure of the product was characterized by mass spectra and 1 H NMR. The dual-stimuli responsive properties of C11-N-Fe were investigated by optical transmittance and cyclic volta-mmograms. The results show that C11-N-Fe has good dual-stimuli properties. pH and redox dual-stimulated responsive foams can be prepared by C11-N-Fe hydrochloride surfactant. Moreover, the defoaming process triggered pH or redox reaction can be completed within 2 min. C11-N-Fe hydrochloride surfactant can also act as the emulsifier for n-decane/water system, because of it contains rigid ferrocenyl on hydrophobic chain. The C11-N-Fe hydrochloride emulsion with uniform particle size can be prepared. Besides, the stability of the emul-sion becomes more stable with increasing of the concentration of C11-N-Fe hydrochloride surfactant. Further-more, the emulsion can also be triggered by pH and redox dual-stimuli.