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Jing Li,Qi Liu,Ruixin Jin,Bolin Yin,Xilian Wei,Dongmei Lv 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-
A practical and smart micelle system with pH, light and temperature responses, prepared using the cationicsurfactant 3-hexadecyloxy-2-hydroxypropyl trimethyl ammonium bromide and 4-(phenylazo)-benzoic acid (ACA) (in its salt form), was developed as a highly promising fluid for applications in differentfields. With increasing the trans-ACA concentration, g0 of the solution increases first and decreasessubsequently, and the maximum was at 17 mM, the micellar structure transform from spherical towormlike micelles, and then to rod morphology. The solution viscosity could be reversibly regulated atpH 4–12 due to the transition of aggregate morphology of self-assembling structure. UV/vis irradiationresulted in a trans to cis photoisomerization of the ACA molecule, and induced the conversion of correspondingwormlike structures into the rodlike micelles. With temperature increase the g0 of solutionpeaks at 28.6 C and it doesn’t follow an Arrhenius law, micellar contour length profile also variesbetween wormlike and rodlike. The regulatory mechanism of the micellar solution under the three stimuliis discussed based on the obtained data. This novel smart system may provide a new theoretical basisfor future applications, opening a new avenue for synthesizing multifunctional aggregates to adapt tovarious environmental changes.
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