Heteroaggregation between particles modified by polyelectrolyte multilayers

Cerbelaud, Manuella; Bennani, Yasmine; Peyratout, Claire

doi:10.1016/j.colsurfa.2022.129572

Cited by 5 publications

(4 citation statements)

References 44 publications

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“…Nevertheless, no unambiguous trend was observed with the monovalent cations. Obviously, other interactions than ion-specific effects may also act during destabilization of the coherent structure by increasing the salinity, and they involve electrostatic charge screening, ,, for instance.…”

Section: Resultsmentioning

confidence: 99%

“…Such a difference is due to the joint effect of the charge correlation between the counterions and the polymer charges, 36 in addition to the higher ionic strength in the multivalent salt solutions at the same total salt concentrations. The latter condition gives rise to more pronounced salt screening 35,43 and thus lower magnitudes of the zeta potentials, whose values measured below (0.03 g/L) and above (27 g/L) the TSC are presented in Figure 6.…”

Section: Effect Of Salts On the Polymer Flowmentioning

confidence: 96%

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Ion-Specific Effects on the Structure, Size, and Charge of Polymers Applied in Enhanced Oil Recovery

Vargáné Árok,

Sáringer,

Papp

et al. 2024

Energy Fuels

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Polymers are widely applied in enhanced oil recovery (EOR) utilizing the increased viscosity to sweep oil residuals from reservoirs, and thus, various types of polymers are available in the market. The salinity of the oil reservoirs is a key question in EOR processes since the chemical composition and concentration of salts in the underground water highly affect the viscoelastic properties of the EOR polymers. Here, four types of commercially available polymers containing AAM, AAC, and AMPS and hydrophilic monomers were studied, considering rheology, size, and charge features in aqueous solutions. The salinity-dependent coherent−incoherent (gel−sol) structural transitions were characterized by the transition salt concentration (TSC) values, which were sensitive to the valence of the counterions in the systems. The TSC data were also dependent on the rheology setup (rotational or oscillation), indicating the importance of the flow conditions in the oil reservoirs. The obtained data revealed that kosmotrope ions such as Ca 2+ are efficient in stabilizing the sol, i.e., macromolecular solution, state in contrast to chaotrope ions like Na + , whose presence led to higher TSC values. Other polymer−counterion interactions such as ion binding and charge screening also play crucial roles in the structure formation, size, and charge features of the polymers. The reported data are important to choose polymer solutions for EOR applications in reservoirs of different salinities.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Salts On the Polymer Flowmentioning

confidence: 96%

Ion-Specific Effects on the Structure, Size, and Charge of Polymers Applied in Enhanced Oil Recovery

Vargáné Árok,

Sáringer,

Papp

et al. 2024

Energy Fuels

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“…The latest work reveals that the strong byssus-tissue connection in mussels mainly relies on multiscale hierarchical structures rather than special chemical interactions. , Polycation and polyanion mixed solution possesses the inherent capability to spontaneously form polyelectrolyte multilayers (PEMs) based on the physical adsorption of oppositely charged species via electrostatic interactions. − Attributable to their no-fuss, straightforward preparation techniques, PEMs are extensively used as agents in the modification of surfaces, − platforms for drug and for substrate-mediated delivery in biomedical applications, and materials for tissue engineering . It is worth emphasizing that these polyelectrolyte hierarchical structures have been found to improve surface adhesion in experiments. , Free-standing PEMs loaded with bis[2-(4-hydroxyphenyl) benzimidazole] have been constructed by the layer-by-layer (LBL) self-assembly method to enhance wound adhesion and accelerate healing process .…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Hierarchical Structures Formed by Sequence-Defined Polycations and Homopolyanions for High Salt-Tolerance Adhesives

Chang,

Jiang

2024

Macromolecules

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The bridges formed by polycationic chains in the nanoslits can induce attraction interactions, but this bridge adhesion is markedly weak and quickly diminishing when exposed to high salinity conditions. In this work, we propose an ingenious method to enhance the adhesive strength in systems with high salt concentrations by introducing short homopolyanion (HPA) chains into the sequence-defined polycation (SDPC) solutions. The effects of SDPC/HPA chain lengths, monomer sequence distributions, monomer concentrations, and surface charge density were systematically investigated by using polymer density functional theory and molecular dynamics simulation. The results show that the origin of the strong adhesion is the spontaneous formation of polyelectrolyte multilayers (PEMs) induced by HPAs. It is fascinating to observe that these strong adhesive interactions induced by PEMs exhibit high salt tolerance; i.e., the peel force (which can be used to denote the adhesion performance) does not decline even at high salt concentrations. In addition, the increase in the chain length of SDPC is beneficial to the formation of PEMs, resulting in a stronger peel force. Moreover, among the alternating [A], tapered [T], and reversely tapered [R] SDPCs, the systems with [T]-sequence PC/HPA exhibit optimal adhesive performance due to their favorable conditions for the formation of PEMs, characterized by the weakest decentralization effect of electrostatic attraction.

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“…They can form heteroaggregates with natural and artificial nanomaterials (e.g., suspended sediment [Li et al 2019b], CeO 2 [Li et al 2020a], and iron oxides [Li et al 2019a]) in aqueous environments mainly through electrostatic interaction, considerably impacting their aggregation and sedimentation (Argun and Statt 2023;Chrysikopoulos et al 2017;Liu et al 2017;Zhao et al 2018). In addition, the ionic strength of the aqueous environment can affect the aggregation and sedimentation behaviors of heteroaggregates (Cerbelaud et al 2022;Nie et al 2023). However, the detailed binding modes or interaction mechanisms between heteroaggregates in the presence or absence common ions are often unclear, which largely hinders our understanding of the geochemical behavior of nanoplastics and their combinative effects on ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Heteroaggregation and sedimentation of natural goethite and artificial Fe3O4 nanoparticles with polystyrene nanoplastics in water

Wu,

Yang,

Zhao

et al. 2024

Carbon Res.

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Iron oxide nanomaterials play important roles in biogeochemical processes. This study investigates the effects of representative natural carbonaceous materials (humic acid [HA] and extracellular polymeric substances [EPS]) and cations on the heteroaggregation and sedimentation of engineered and natural iron oxide nanomaterials with montmorillonite and sulfate- and amine-modified polystyrene (PS) nanoparticles (NPs) (S- and N-PS NPs, respectively) in water, assessing their environmental behavior and differences in colloidal stability parameters. In addition, a novel extended Derjaguin–Landau–Verwey–Overbeek theory (XDLVO) was developed to describe the mechanism of colloidal behavior that concurrently considers gravitational and magnetic attraction forces. In CaCl2 solution and most natural water samples, negatively charged S-PS NPs promoted heteroaggregation with goethite and iron oxide (Fe3O4) NPs more than positively charged N-PS NPs with increased nanoplastic particle concentration. In seawater, the introduction of S- and N-PS NPs increased the maximum net energy (barrier) (ΦMAX) of heteroaggregation and sedimentation with goethite and Fe3O4 NPs, facilitating dispersal and suspension of the system. The X-ray photoelectron spectroscopy (XPS) and molecular dynamics simulation results suggested that Ca2+ forms bridging interactions between Fe3O4 and S-PS NPs to promote aggregation, while competitive adsorption occurs between the N atoms of N-PS NPs and Ca2+ on the surface of Fe3O4 NPs. The study findings will help to improve the understanding of interfacial processes affecting ions at nanomaterial/water interfaces and assessments of the geochemical behavior and ecological risks of nanoplastics.

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Heteroaggregation between particles modified by polyelectrolyte multilayers

Cited by 5 publications

References 44 publications

Ion-Specific Effects on the Structure, Size, and Charge of Polymers Applied in Enhanced Oil Recovery

Ion-Specific Effects on the Structure, Size, and Charge of Polymers Applied in Enhanced Oil Recovery

Nanoscale Hierarchical Structures Formed by Sequence-Defined Polycations and Homopolyanions for High Salt-Tolerance Adhesives

Heteroaggregation and sedimentation of natural goethite and artificial Fe3O4 nanoparticles with polystyrene nanoplastics in water

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