Facile synthesis, surface activity, wettability and ultrahigh foaming properties of novel nonionic Gemini fluorocarbon surfactants

Chen, Cailian; Liao, Yi-Fan; Lu, Feng; Zheng, Yusen; Peng, Yingying; Ding, Chong-Wei; Tong, Qing‐Xiao

doi:10.1016/j.molliq.2020.112469

Cited by 24 publications

(6 citation statements)

References 61 publications

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“…[16][17][18][19][20][21][22][23][24][25] In some surfactant application fields (especially, wettability field), the surfactants with higher SA normally exhibit better ability in affecting two-phase interface properties than the surfactants with low SA. [26,27] Hence, we believe that for the surfactants at the water-dope interface during the NIPS process, the surfactants with higher SA might be superior to the surfactants with low SA in the effect of promoting the mutual diffusion of water and polymer solution, which are two different phases.…”

Section: Introductionmentioning

confidence: 99%

Improved Desalination Performance of Polyvinylidene Fluoride Hollow Fiber Membranes by the Intermediate Role of Surfactants

Kong

Liu

et al. 2020

Macro Materials & Eng

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Polymer hollow fiber membranes (HFMs) are the core or base membranes of various membrane processes (e.g., ultrafiltration and membrane distillation). Preparing polymer HFMs with higher water flux helps improve the efficiency of the membrane processes. Using pore‐forming additives is the commonly used and efficient method to improve the water flux. The current dilemma is that the conventional methods that increase the amounts or the molecular weight of the additives to improve the water flux usually lead to the decrease in membrane mechanical strength. Herein, different from the conventional research strategy, increasing the surfactant surface activity (SA) is first found to deeply promote the core of nonsolvent‐induced phase separation (NIPS) that of the mutual diffusion between water and dopes. As a result, this method distinctly improves the surface porosity (from 0.8% to 9.7%) and optimizes the pore size distribution of polyvinylidene fluoride (PVDF) HFMs. Benefit from these, the water flux of ultrafiltration (3.1‐fold increase, maximally) and direct contact membrane distillation (2.3‐fold increase, maximally) are increased greatly. Moreover, the mechanical strength is not negatively affected due to the additive amount of small molecule surfactants is constant and small (2.0 wt%).

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Section: Introductionmentioning

confidence: 99%

Improved Desalination Performance of Polyvinylidene Fluoride Hollow Fiber Membranes by the Intermediate Role of Surfactants

Kong

Liu

et al. 2020

Macro Materials & Eng

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“…A foam can be defined as a two-phase colloidal system in which bubbles are dispersed in a continuous liquid phase . Foam can be characterized by foamability and foam stability . Foaming performance is directly related to the ability to produce foam.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Surface Activity, and Foamability of Two Short-Chain Fluorinated Sulfonate Surfactants with Ether Bonds

Guo,

Huang

et al. 2023

Langmuir

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Fluorinated surfactants are widely used in many fields because of their excellent surface active properties, but their high stability has caused many environmental problems. With the ban and restriction of classical long-chain fluorinated surfactants such as perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) worldwide, the development and replacement of their alternatives is now a major challenge. How to reduce environmental persistence, bioaccumulation, and biotoxicity while maintaining high surface activity has become an important issue in the development of fluorinated surfactants. Using short-chain fluorinated surfactants is one of the important solutions to resolve the pollution of organic fluorinated compounds. In this article, we synthesized two short-chain fluorinated surfactants with ether bonds. One of them 6:2 FTESNa (2) used the perfluoroalkyl chain (n-C 6 F 13 -) and the other C72 FEESNa (4) used the fluoroether segment with six fluorinated carbons and two oxygens (CF 3 OCF(CF 3 )CF 2 OCF(CF 3 )). The surface activity, foam performance, and wettability of the two molecules were measured. The surface tensions at critical micelle concentration (γ cmc ) and the critical micelle concentration (cmc) of 2 and 4 were 17.6 mN/m (2.2 g/L) and 20.2 mN/m (4.6 g/L), respectively. Both of them were significantly superior to the surface activity of 6:2 FTSNa (7) which is one of the current alternatives for PFOS. Additionally, the foamability and foam stability of both 2 and 4 were better than that of 7. In the aspect of wettability on PTFE, that of 4 was greater than those of 2 and 7. In summary, this work provided a new choice for alternatives of PFOS and PFOA.

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“…The foam stability is relative to the surface viscosity of the liquid film. The interface configuration of the surfactant with a low surface tension and long hydrophobic carbon chain is more compact, which increases the strength of the liquid film, thus preventing the liquid from coming out of the liquid film, delaying the foam crumbling, and improving the stability of foam …”

Section: Resultsmentioning

confidence: 99%

Green Synthesis, Surface Activity, Micellar Aggregation, and Foam Properties of Amide Quaternary Ammonium Surfactants

Jia

Wei

et al. 2022

ACS Omega

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A series of amide quaternary ammonium surfactants with the formula 9,11,13,15) were synthesized using a fatty acid, N,Ndimethylethylenediamine, and a green reagent dimethyl carbonate. A comparative study of the four surfactants in terms of surface activity, aggregation characteristics, and foam properties was conducted. The results show that these amide quaternary ammonium surfactants reduce the surface tension of water to a minimum value of 23.69 mN•m −1 at a concentration of 1.55 × 10 −4 mol•L −1 and self-assemble spontaneously into aggregates, which are mostly vesicles. Furthermore, with increasing the alkyl chain length, their critical micelle concentration (CMC) values and surface tension values at the CMC (γ CMC ) decrease and then increase, and the degree of counterion binding (β) decreases. It is also found that these amide quaternary ammonium surfactants exhibit excellent foam ability and foam stability.

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Facile synthesis, surface activity, wettability and ultrahigh foaming properties of novel nonionic Gemini fluorocarbon surfactants

Cited by 24 publications

References 61 publications

Improved Desalination Performance of Polyvinylidene Fluoride Hollow Fiber Membranes by the Intermediate Role of Surfactants

Improved Desalination Performance of Polyvinylidene Fluoride Hollow Fiber Membranes by the Intermediate Role of Surfactants

Synthesis, Surface Activity, and Foamability of Two Short-Chain Fluorinated Sulfonate Surfactants with Ether Bonds

Green Synthesis, Surface Activity, Micellar Aggregation, and Foam Properties of Amide Quaternary Ammonium Surfactants

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