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Synthesis, surface adsorption and micelle formation of a class of morpholinium gemini surfactants
Caili Dai,Sisi Fang,Mei Hu,Xiaojuan He,Mingwei Zhao,Xuepeng Wu,Shuai Yang,Yining Wua 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.54 No.-
A series of novel gemini surfactants with morpholinium headgroup, 4, 40-(alkane-4, n-40)bis(4-decyl, dodecyl or tetradecyl morpholinium)bromide (Mm-n-Mm, m = 10, 12, 14, n = 3, 4), were synthesized and characterized using 1H NMR. The surfactants were investigated for their adsorption and micellization in aqueous solutions through surface tension and conductivity methods It was found that the physicochemical properties, such as surface activity and thermodynamic property of the aqueous surfactant system, were dependent on the lengths of both hydrophobic tail chain and spacer. With the increase of the hydrophobic chain length or the decrease of spacer length, the cmc value of the surfactant decreases and the ability to reduce the surface tension is stronger. The calculation result of thermodynamic parameters indicated that the surfactants we synthesized are more inclined to aggregate in solution as compared with traditional m-s-m type gemini surfactants, and the micellization of Mm-n-Mm was an entropy-driven process.
Gang Qin,Yue Wang,Wenjie He,Da Zhang,Xiaojuan Yu,Fenghan Gong,Hengyi Yu,Xiang Yu,Jia Yang,Qiang Chen 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.122 No.-
Integrated supercapacitor with stable electrochemical performance under complex deformations is theprospective energy storage device for wearable electronics. However, there is often a conflict betweenthe mechanical performance and the specific capacitance of the conventional conductive polymerbasedintegrated supercapacitor. In this work, a novel integrated supercapacitor based on adhesive gelelectrolyte has been prepared by physical adsorption, which not only avoids the drawbacks of the conventionalintegrated supercapacitor but also exhibits the electrode universality including powder electrodematerial. The adhesive triple network polyacrylamide/polydopamine/agar/H3PO4 gel electrolyteis fabricated with high ionic conductivity, toughness and adhesion. Based on this, the integrated supercapacitoris assembled by spraying activated carbon powder on both sides of the pre-stretched biaxiallygel electrolyte. Due to the strong interfacial adhesion, such a device exhibits low interfacial resistance andhigh specific capacitance of 155 mF/cm2 at 0.5 mA/cm2. More impressively, the capacitance retention canreach 92.4% after 10 cutting/healing cycles and even keep the brilliant self-healabillity at 20 C. Additionally, it can hold stable electrochemical performance when exposed to harsh environments. The physical adsorption strategy would offer novel inspiration for the development of integrated supercapacitorand has great practical applications in wearable and portable electronics.