文献类型：期刊文献

英文题名：Study on rheology of a novel UV-light sensitive trimeric anionic-cationic surfactant/trans-o-methoxycinnamic acid micellar system

作者：Han, Xiaoyang[1];Xu, Wenting[1];Fang, Bo[1];Li, Yudie[1];Tian, Zhenrui[1]

机构：[1]East China Univ Sci & Technol, Res Ctr Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Lab Chem Engn Rheol, Shanghai 200237, Peoples R China

年份：2024

卷号：61

期号：1

起止页码：76

外文期刊名：TENSIDE SURFACTANTS DETERGENTS

收录：;EI(收录号：20234915162909);WOS:【SCI-EXPANDED(收录号:WOS:001110257300001)】；

基金：China's National Science and Technology Major Project [grant numbers 2017ZX05023003]; PetroChina Science and Technology Management Department Project [grant numbers 2020B-4120].

语种：英文

外文关键词：light-responsive micelles; trimeric anionic-cationic surfactant; trans-o-methoxycinnamic acid; rheology

摘要：Two novel UV photosensitive micellar systems, trimeric dodecyl anionic-cationic surfactant (TDCC)/trans-OMCA, and trimeric cetyl anionic-cationic surfactant (TCCC)/trans-OMCA, were successfully synthesized by using two different carbon chain length trimeric anionic-cationic surfactants (TACS, including TDCC and TCCC) and the photosensitive additive trans-o-methoxycinnamic acid (trans-OMCA). The incorporation of trans-OMCA resulted in a peak in the zero shear viscosity (eta 0) of the system at pH = 6.17-6.61. The flow behaviour of the TACS/OMCA system was well described by the Carreau-Yasuda model. Prior to UV irradiation, the TCCC/trans-OMCA system exhibited pronounced shear thinning, thixotropic, and viscoelastic properties. After UV irradiation at 365 nm, the isomerization of trans-OMCA to cis-OMCA caused the disruption of the network structures, leading to a significant decrease in the thixotropic and viscoelastic properties, resulting in a decrease in viscosity. The viscosity reduction rate of the TCCC/trans-OMCA system reached 99 %. The influence of the hydrophobic carbon chain length on the UV responsiveness was also investigated. The TDCC/trans-OMCA system exhibited an 86 % decrease in eta 0 after UV irradiation, highlighting the favorable effect of longer hydrophobic tail chains in improving the UV responsiveness of the micellar system. The UV light kinetics of the TCCC/trans-OMCA solution were studied and a rheological model was developed to accurately describe the viscosity changes. The TCCC was found to predominantly exhibit cationic characteristics at pH = 6.17-6.61. In this pH range, the 2 wt% TCCC/0.12 wt% NaSal system exhibited excellent viscoelasticity, and the addition of trans-OMCA disrupted the network structure resulting in a decrease in viscosity. After UV irradiation, the viscosity of the system increased by 2.5 times, confirming the potential of the TCCC/NaSal/trans-OMCA micellar system as a UV thickener.