Photo-responsive azobenzene-based surfactants as fast-phototuning foam switch synthesized via thiol-ene click chemistry

Yang, Xiaoyu; Azhar, Umair; Wang, Wei; Zhai, Congcong; Zhang, Qingshuang; Zhang, Shuxiang; Zong, Chuanyong

doi:10.1016/j.colsurfa.2020.125645

Cited by 4 publications

(2 citation statements)

References 41 publications

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“…Differently to cis -formed AzoC 8 F 15 molecules, trans -formed AzoC 8 F 15 molecules closely align horizontally and completely cover the gas-liquid interface of the solution, resulting in a decrease in surface tension. Finally, we obtained the CMC of the trans -formed AzoC 8 F 15 molecules of 0.085 mol/L, and the corresponding surface tension of its solution of 19.08 mN/m [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

Bioinspired Photo-Responsive Liquid Gating Membrane

Zhang

Lei

et al. 2022

Biomimetics

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Stomata in the plant leaves are channels for gas exchange between the plants and the atmosphere. The gas exchange rate can be regulated by adjusting the opening and closing of stoma under the external stimuli, which plays a vital role in plant survival. Under visible light irradiation, the stomata open for gas exchange with the surroundings, while under intense UV light irradiation, the stomata close to prevent the moisture loss of plants from excessive transpiration. Inspired by this stomatal self-protection behavior, we have constructed a bioinspired photo-responsive liquid gating membrane (BPRLGM) through infusing the photo-responsive gating liquid obtained by dissolving the azobenzene-based photo-responsive surfactant molecules (AzoC8F15) in N,N-Dimethylacetamide (DMAC) into nylon porous substrate, which can reversibly switch the open/closed states under different photo-stimuli. Theoretical analysis and experimental data have demonstrated that the reversible photoisomerization of azobenzene-based surfactant molecules induces a change in surface tension of the photo-responsive gating liquid, which eventually results in the reversible variation of substantial critical pressure for gas through BPRLGM under alternating UV (PCritical (off)) and visible (PCritical (on)) light irradiations. Therefore, driven by a pressure difference ΔP between PCritical (on) and PCritical (off), the reversible switches on the open/closed states of this photo-responsive liquid gating membrane can be realized under photo-stimuli. This bioinspired membrane with switchable open/closed liquid gating performance under photo-stimuli has the opportunity to be used in the precise and contactless control of microfluidics.

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Section: Resultsmentioning

confidence: 99%

Bioinspired Photo-Responsive Liquid Gating Membrane

Zhang

Lei

et al. 2022

Biomimetics

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“…Foam ratio (R) and foam half-life (t1/2) are two important indicators to measure the performance of surfactant foam. Generally speaking, the larger the R value, the better the foaming performance [50]; The longer the half-life, the better the stability of foam [51]. The foam performance of CnEO-5 (n = 8, 12, 16) is shown in the following Figure 9.…”

Section: Foam Performancementioning

confidence: 99%

Study on the Synthesis, Surface Activity, and Self-Assembly Behavior of Anionic Non-Ionic Gemini Surfactants

Man,

2024

Molecules

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The use of surfactants in oil recovery can effectively improve crude oil recovery rate. Due to the enhanced salt and temperature resistance of surfactant molecules by non-ionic chain segments, anionic groups have good emulsifying stability. Currently, there are many studies on anionic non-ionic surfactants for oil recovery in China, but there is relatively little systematic research on introducing EOs into hydrophobic alkyl chains, especially on their self-assembly behavior. This article proposes a simple and effective synthesis method, using 3-aminopropane sulfonic acid, fatty alcohol polyoxyethylene ether, and epichlorohydrin as raw materials, to insert EO into hydrophobic alkyl chains and synthesize a series of new anionic non-ionic Gemini surfactants (CnEO-5, n = 8, 12, 16). The surface activity, thermodynamic properties, and self-assembly behavior of these surfactants were systematically studied through surface tension, conductivity, steady-state fluorescence probes, transmission electron microscopy, and molecular dynamics simulations. The surface tension test results show that CnEO-5 has high surface activity and is higher than traditional single chain surfactants and structurally similar anionic non-ionic Gemini surfactants. Additionally, thermodynamic parameters (e.g., ΔG°mic ΔH°mic ΔS°mic et al. indicate that CnEO-5 molecules are exothermic and spontaneous during the micellization process. DLS, p-values, and TEM results indicate that anionic non-ionic Gemini surfactants with shorter hydrophobic chains (such as C8EO-5) tend to form larger vesicles in aqueous solutions, which are formed in a tail to tail and staggered manner; Negative non-ionic Gemini surfactants with longer hydrophobic chains (such as C12EO-5, C16EO-5) tend to form small micelles. The test results indicate that CnEO-5 anionic non-ionic Gemini surfactants have certain application prospects in improving crude oil recovery.

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Construction of photoresponsive azobenzene-decorated cationic surfactant-based self-assembled vesicles and controlled drug release

Yun

et al. 2021

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Photo-responsive azobenzene-based surfactants as fast-phototuning foam switch synthesized via thiol-ene click chemistry

Cited by 4 publications

References 41 publications

Bioinspired Photo-Responsive Liquid Gating Membrane

Bioinspired Photo-Responsive Liquid Gating Membrane

Study on the Synthesis, Surface Activity, and Self-Assembly Behavior of Anionic Non-Ionic Gemini Surfactants

Construction of photoresponsive azobenzene-decorated cationic surfactant-based self-assembled vesicles and controlled drug release

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