Stability and shear thixotropy of multilayered film foam

Du, Xing; Zhao, Liancheng; Xiao, Helin; Liang, Feng; Chen, Hui; Wang, Xin; Wang, Junjie; Qu, Wei Min; Lei, Zhongxing

doi:10.1007/s00396-014-3361-2

Cited by 11 publications

(4 citation statements)

References 37 publications

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“…At the same shear rate, the order of foam apparent viscosity was: TD > OD > DA > normal. This was of the same order of magnitude as the apparent viscosity of the corresponding solution, since high solution viscosity tends to correspond to high foam viscosity [ 35 ]. At the same shear rate, the foam viscosity increase ratio

was used to indicate the increased multiple of foam viscosity after adding the stabilizer.…”

Section: Resultsmentioning

confidence: 99%

Effects of Fatty Alcohols with Different Chain Lengths on the Performance of Low pH Biomass-Based Foams for Radioactive Decontamination

Zhang

Liang

Xi³

et al. 2022

Molecules

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Compared with polymers and nanoparticles, fatty alcohols can not only increase the stability of foam, but also maintain better foamability at pH < 2, which is beneficial to reduce waste liquid and increase decontamination efficiency for radioactive surface pollution. However, different fatty alcohols have different hydrophobic chain lengths. The effects of fatty alcohols with different chain lengths on the performance of decontamination foam were studied at pH < 2, to assist in the selection of suitable fatty alcohols as foam stabilizers. Combined with betaine surfactant and phytic acid, biomass-based foams were synthesized using fatty alcohols with different chain lengths. When the hydrophobic tail groups of the fatty alcohol and the surfactant were the same, the foam showed the best performance, including the lowest surface tension, the highest liquid film strength, the greatest sag-resistance and the best stability. However, when the hydrophobic tail groups were different, the space between adjacent surface active molecules was increased by thermal motion of the excess terminal tail segments (a tail-wagging effect), and the adsorption density reduced on the gas-liquid interface, leading to increased surface tension and decreased liquid film strength, sag-resistance and stability. The use of decontamination foam stabilized by fatty alcohols with the same hydrophobic group as the surfactant was found to increase the decontamination rate of radioactive uranium pollution from 64 to over 90% on a vertical surface.

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was used to indicate the increased multiple of foam viscosity after adding the stabilizer.…”

Section: Resultsmentioning

confidence: 99%

Effects of Fatty Alcohols with Different Chain Lengths on the Performance of Low pH Biomass-Based Foams for Radioactive Decontamination

Zhang

Liang

Xi³

et al. 2022

Molecules

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“…The most commonly used hydrocarbon foaming agent is SDS. 32 It is very cheap and has a wide range of sources. Fluorocarbon surfactant HPA4 was mixed with SDS, with the aim of creating a foaming agent system with high efficiency under the conditions of relatively low cost.…”

Section: Foaming Properties Of Uorocarbon Surfactant Hpa4mentioning

confidence: 99%

Construction and performance evaluation of a highly efficient mixed foaming system

et al. 2015

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To develop a highly efficient foaming agent, the fluorocarbon surfactant (4-hydroxyethylether) (pentadecafluoroalkyl) amide was designed and synthesized and the surface activity and foaming performance were investigated through surface tension, surface viscosity and foaming performance measurements. The results show that the fluorocarbon surfactant has superior surface activity and can reduce the surface tension of water to 15.3 mN m À1 . When used as a foaming agent, it also shows great advantages over conventional hydrocarbon surfactants. For the sake of cost reduction, sodium dodecyl sulfate (SDS) was added to construct a highly efficient foaming agent. The results show that the mixture has superior surface activity and great foaming ability. Surface viscosity measurements show that surface viscosity of the mixture is much higher than that of single SDS. The foam integrated value of the mixture is enhanced by about 67% compared to SDS. The optimized formula of the foaming system is 0.03-0.08% HPA4 + 0.20-0.40% SDS.

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“…The foam forming of cellulose-based materials is influenced by the surfactant type and dosage [25]. During foam formation, the surfactants are arranged in an ordered manner on the liquid film surface, wherein the hydrophilic group is directed toward the water and the hydrophobic group is directed toward the air [26]. When the concentration of surfactants reaches the critical micelle concentration, the interface adsorption is saturated and micelles are formed.…”

Section: Introductionmentioning

confidence: 99%

Green Preparation of Lightweight, High-Strength Cellulose-Based Foam and Evaluation of Its Adsorption Properties

et al. 2023

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In recent years, the application scope of most cellulose-based foams is limited due to their low adsorbability and poor recyclability. In this study, a green solvent is used to extract and dissolve cellulose, and the structural stability of the solid foam is enhanced by adding a secondary liquid via the capillary foam technology, and the strength of the solid foam is improved. In addition, the effects of the addition of different gelatin concentrations on the micro-morphology, crystal structure, mechanical properties, adsorption, and recyclability of the cellulose-based foam are investigated. The results show that the cellulose-based foam structure becomes compact, the crystallinity is decreased, the disorder is increased, and the mechanical properties are improved, but its circulation capacity is decreased. When the volume fraction of gelatin is 2.4%, the mechanical properties of foam are the best. The stress of the foam is 55.746 kPa at 60% deformation, and the adsorption capacity reaches 57.061 g/g. The results can serve as a reference for the preparation of highly stable cellulose-based solid foams with excellent adsorption properties.

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Stability and shear thixotropy of multilayered film foam

Cited by 11 publications

References 37 publications

Effects of Fatty Alcohols with Different Chain Lengths on the Performance of Low pH Biomass-Based Foams for Radioactive Decontamination

Effects of Fatty Alcohols with Different Chain Lengths on the Performance of Low pH Biomass-Based Foams for Radioactive Decontamination

Construction and performance evaluation of a highly efficient mixed foaming system

Green Preparation of Lightweight, High-Strength Cellulose-Based Foam and Evaluation of Its Adsorption Properties

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