Studying the interaction of hydrophobically modified ethoxylated urethane (HEUR) polymers with sodium dodecylsulfate (SDS) in concentrated polymer solutions

Ibrahim, Mervat S.; Valencony, Jordane; King, Stephen M.; Murray, Martin; Szczygiel, Agnieszka; Alexander, Bruce D.; Griffiths, Peter C.

doi:10.1016/j.jcis.2018.06.042

Cited by 6 publications

(3 citation statements)

References 29 publications

(32 reference statements)

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“…In the three cases, the solution viscosities were stable from pH 2.5 to 10 and from 0 to 1.2 wt % NaCl, highlighting very stable and versatile networks. Lately, Ibrahim et al 60 reported very interesting results about the interactions occurring between SDS and the urethane linkages of HEURs, a parameter always neglected in HEUR synthesis. They observed a higher viscosity for HEURs with higher urethane linkages content.…”

Section: Synthesis Of Heursmentioning

confidence: 99%

From Architectures to Cutting-Edge Properties, the Blooming World of Hydrophobically Modified Ethoxylated Urethanes (HEURs)

et al. 2020

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Hydrophobically modified ethoxylated urethanes (HEURs) are associative polymers that, compare to others, are far less sensitive to solution parameters, especially pH and ionic strength. Therefore, they are widely used as rheology modifiers in many different waterborne systems such as inks, coatings, emulsions, etc. In solutions, HEURs form transient networks through molecular associations between their hydrophobic groups. The transient network formation and its characteristics are responsible for the rheological properties and depend on the HEUR chains architecture. Many parameters such as molecular weight, size and nature of hydrophobic groups, polymer concentration, etc must be controlled to tune the several physicochemical properties of HEUR solutions. This article aims to give an overview of the HEUR studies reported in the literature in order to highlight the structure/rheological properties relationship. The article also draws attention to new trends in HEURs with innovative architectures and stimuli-responsive properties.

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Section: Synthesis Of Heursmentioning

confidence: 99%

From Architectures to Cutting-Edge Properties, the Blooming World of Hydrophobically Modified Ethoxylated Urethanes (HEURs)

et al. 2020

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“…Therefore, the overall mechanical properties of the gel will be reduced. When the optimal concentration of SDS is reached, the network uniformity during gel polymerization is improved, the cross-linking density is stable, and the mechanical properties are enhanced. , With the further increase of SDS concentration, the stability of the network aggregation structure decreases. As the ratio of SA to AM increases, the chain entanglement in the self-healing gel network increases, thus enhancing the tensile strength of the rehealing.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Performance of a Novel High-Efficiency Coal Dust Suppressant Based on Self-Healing Gel

Ding

Zhou

Liu

et al. 2020

Environ. Sci. Technol.

102

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During transportation and storage, coal produces a lot of dust, which pollutes the environment and threatens the occupational health of workers. Although many dust suppressants have been developed for dust prevention at work, the implementation of current dust suppressants does not meet the requirements due to various factors such as the hydrophobic nature of coal dust and a harsh external environment. In this study, hydroxyethyl cellulose, acrylamide, and stearyl methyl acrylate were used for micelle polymerization to prepare an environmental protection dust suppressant for preventing dust during coal storage and transportation. The microstructure of the reactants and the products was analyzed by Fourier transform infrared as well as scanning electron microscopy. The strength and self-healing tensile properties of binder coal were taken as indicators to determine the best synthesis dosage and conditions. The dust suppressant particles are applied to the dust accumulation area, contact each other after water absorption, and swell to complete the healing, to achieve the purpose of dust control. The evaluation of the relevant properties of the dust suppressant reveals that the dust suppressant has a good covering effect, an excellent dust suppressant performance, and a significant dust suppression action.

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“…Figure 4, shows the self-diffusion coefficient of HEUR in presence and absence of PS-BA-L. The polymer self-diffusion coefficients for the no-particle case have been taken from our previous study (32). One limiting case may be identifiedthat the polymer is completely adsorbed to the particle.…”

Section: Solution Polymer Aggregates In Presence Of Ps-ba-lmentioning

confidence: 99%

Surfactant modulated interaction of hydrophobically modified ethoxylated urethane (HEUR) polymers with impenetrable surfaces

Ibrahim

Rogers

Mahmoudi

et al. 2019

Journal of Colloid and Interface Science

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The presence of surfactant modulates the surface-chemistry-specific interaction of hard colloidal particles (latex) with HEUR polymers, principally through introducing a preferential solution interaction rather than a competitive surface interaction; addition of surfactant leads to a preponderance of polymer/surfactant solution complexes rather than surface-bound complexes. Experiments A range of model formulations comprising a hexyl end-capped urethane polymer (C6-L-(EO100-L)9-C6), sodium dodecylsulfate (SDS) and a series of polystyrene-butylacrylate latices (PS-BA-L) have been characterised in terms of rheology, particle surface area (solvent relaxation NMR), polymer conformation (small-angle neutron scattering) and solution composition to build up a detailed picture of the distribution of the HEUR in the presence of both surfactant and latex. Findings There is very weak adsorption of C6-L-(EO100-L)9-C6 to only the most hydrophobic latex surface studied, an adsorption that is further weakened by the addition of low levels of surfactant. Macroscopic changes in the hydrophobic latex system may be interpreted in terms of bridging flocculation at low polymer concentrations. No adsorption of C6-L-(EO100-L)9-C6 is observed in the case of hydrophilic surfaces. In most cases, the observed behaviour of the ternary system (polymer/surfactant/particle) is highly reminiscent of the binary (polymer/surfactant) system at the appropriate composition, suggesting that the polymer/surfactant solution interaction is the dominant one.

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Studying the interaction of hydrophobically modified ethoxylated urethane (HEUR) polymers with sodium dodecylsulfate (SDS) in concentrated polymer solutions

Cited by 6 publications

References 29 publications

From Architectures to Cutting-Edge Properties, the Blooming World of Hydrophobically Modified Ethoxylated Urethanes (HEURs)

From Architectures to Cutting-Edge Properties, the Blooming World of Hydrophobically Modified Ethoxylated Urethanes (HEURs)

Synthesis and Performance of a Novel High-Efficiency Coal Dust Suppressant Based on Self-Healing Gel

Surfactant modulated interaction of hydrophobically modified ethoxylated urethane (HEUR) polymers with impenetrable surfaces

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