Introduction to Polymer Adsorption

The depressing effect of the LPAM tested in this work on molybdenite flotation and the specific polymer adsorption on the mineral decreased as the pH increased which is opposite to what is observed for more anionic polyacrylamides.

Until 50 ppm of MIP functionality is checked for confirming the MIP polymer adsorption of creatinine and the results are shown, which helps establish the sensing technology even if used for a patient with a high creatinine level.

This work reveals the COF-polymer adsorption behavior and properties at atomic scale, which is crucial to the development of promising COF materials to deal with NP pollution.

Most studies hitherto focus on adsorption on flat surfaces and mesoporous adsorbents with open frameworks, plausibly because of the preconceived notion that it is unlikely for polymers to enter a pore with a diameter that is smaller than the gyration diameter of the polymer in solution; therefore, sub-nanoporous materials are rarely considered as a polymer adsorption medium.

Modification of surface properties by polymer adsorption is a widely used technique to tune interactions in molecular experiments such as nanopore sensing.

The oil recovery depends not only on the permeability distribution but also on the mitigation of the polymer adsorption.

The effects of polymer were captured by considering Todd-Longstaff mixing model, inaccessible pore volume, permeability reduction, polymer adsorption as well as salinity and shear rate effects on polymer viscosity.

19; thus, polymer capture and retention led to core blockage; the leftward shift of the curve corresponding to the porosity component, high porosity peak weakening after polymer injection, moderate and low porosity peaks appearing after polymer injection, and enhancement of lower porosity peaks indicate that, after polymer injection and subsequent waterflooding, polymer adsorption and capture led to blockage of some large pores; the highest pressure gradient, i.

The work physical model was designed through a physical model, and then the polymer adsorption which causing blockage resulting in permeability decrease computed by mathematical model.

The polymer adsorption has caused the polarization of graphene and vice versa.

The effect of polymer adsorption on the stability and viable shelf life of 55 μm diameter oil-in-water (O/W) emulsions containing the steroid, betamethasone 21-phosphate was investigated.

HYPOTHESIS Solid-state polymer adsorption offers a distinct approach for surface modification.

The physical work was designed by a physical model, and then the polymer adsorption that generating blockage emerging in permeability diminish assessed by a mathematical model.

Using cDFT, we calculate the equilibrium properties of polymer solutions near a flat surface while varying the solvent quality, surface-fluid interactions, and the polymer chain lengths to investigate their effects on the polymer adsorption and wetting transitions.

The effect of polymer adsorption on the dispersion stability of particles is an important subject applicable to various manufacturing processes.

In this work, we study the polymer adsorption transition by analyzing the trajectory of the leading zeros as they approach y_{c} in the complex plane.

Hydrogen doping and polymer adsorption at the oxide surface of liquid metal microparticles increase the conductivity and viscoplastic behaviour of the oxide, leading to liquid-metal-based printed circuits with stable resistance up to 500% strain.

Kinetic measurements suggest a two-step adsorption process consisting of a primary polymer adsorption onto the surface followed – in most cases – by a slower secondary process, which involves rearrangements of previously adsorbed polymer molecules, including polymer-on-polymer adsorption.

SAXS analysis confirmed polymer adsorption onto the VLP exterior.

Investigation of the structural development of NPs using the synchrotron vertical-small-angle X-ray scattering technique revealed that increasing polymer adsorption suppresses bonding between the NPs at later stages of drying, when they approach each other and come in contact.

The HIEnKF method has been successively applied to simultaneously estimate multiple model parameters, including porosity and permeability fields, relative permeabilities, polymer viscosity curve, polymer adsorption curve, surfactant interfacial tension (IFT) curve and miscibility function curve, for the SP flooding simulation model.

The results show that the polymer adsorption decreases in the order SiO2B > SiO2>SiO2A, indicating that polymer uptake is higher as the surface acidity of nanoparticles decreases.

We investigate the polymer adsorption as a function of polymer chain length and polymer concentration spanning both dilute and semidilute regimes.

A low permeability fracturing fluid invasion layer (FFIL) is used to characterize leakoff caused clay swelling and polymer adsorption in the matrix pores, and two-phase flow is assumed in the fractures to capture the choking effects.

62 mg haemoglobin/g polymer adsorption capacity value was obtained.

We conclude that the polymer adsorption is an additional factor suppressing κCN fibrillization and fibril growth.

However, the theory and laboratory observations showed a different relation between the polymer adsorption and increasing temperature.

Polymer adsorption measurements from ultraviolet-visible spectrometry were used to quantify the polymer leakage.

A sensitivity analysis of the dissolution dynamic regarding the temperature variation, polymer adsorption, and non-Newtonian behavior of the injected acid is carried out.

The polymer/graphyne and polymer/graphdiyne nanocomposites have been designed using polymer adsorption, nanofiller dispersion, in-situ, or solution method.

The findings provided new molecular insights into the long-standing debates on the role of divalent ions in promoting polymer adsorption on like-charged solid surfaces.

The limitations of polymer flooding are obvious: high oil viscosity requires high concentration of polymer which increases the process cost, presence of clays which increases polymer adsorption, formation brine and water make-up salinity and type of ions which will affect the injected polymer viscosity, and extensively fractured formations which will cause sweep challenges.

The phenomenon of polymer adsorption was applied to modify the surface of microcrystalline cellulose (MCC).

This article considers upscaling of polymer adsorption.

Herein, we employ self-assembled copolymer adsorption layers (SCALs), transferred from the air/water interfacial self-assembly of BCPs, as an effective control of the adsorbed layer in BCP thin films.

This paper focused on the protein and polysaccharide adsorption mechanism on the surface of common soil mineral – silica (SiO2), as well as the biopolymer adsorption effect on the solid aggregation.

The sol-gel synthetic procedure, the composition and molecular weight of the macroinitiators, the polymer adsorption and purification methods, and the final ATRP conditions, were optimised to control the properties of these nanoparticles, in terms of particle size, Z-potential, PGMMA decoration, while preserving enzymatic activity.

Herein, we demonstrate the feasibility of noncovalent polymer adsorption to the GQD surface, with a specific focus on single-stranded DNA (ssDNA).

Different factors are considered such as mobility ratios, polymer adsorption and degradation and heterogeneities.

HYPOTHESIS Polycarboxylate ether (PCE) comb-copolymers are widely used as water reducing agents in the concrete industry while maintaining a high fluidity via the polymer adsorption to the cement particles.

9%, SOR reduction final value 0,5255, polymer adsorption of 818,700 ppm, reservoir final pressure 1,707 psi, and an increase in water viscosity to 0.

Such reorganization in pre-formed organic nanoparticles is unprecedented, and we believe that this is the first report of such an effect induced by polymer adsorption.

The coagulation-flocculation process is characterised by a combination of electrostatic charge neutralisation, polymer bridging and a polymer adsorption mechanism.

The structural and energy characteristics of the polymer adsorption were investigated at different initial positions of the poly(N-vinyl-2-pyrrolidone) macromolecule relative to the cellulose fragment.

For damage to the matrix caused by rock-fluid interaction, clay swelling, and polymer adsorption, a fracturing fluid invasion layer is added to the model between hydraulic fractures and the inner stimulated reservoir volume to capture this kind of damage.

Interfacial tension measurements show that the polymer adsorption increases only marginally at low charge fractions (<5%) but increases more significantly at higher charge fractions for the copolymer, while the corresponding randomly charged P2VP homopolymer analogues display much more sensitivity to the presence of charged groups.

These NPs increased the oil recovery between 2% and 3% by virtue of reduced polymer adsorption caused by the alkalinity of the Fe(OH)3 and TiO2 nanopolymer sols.

From the experimental results, the SO42− ions interfered with polymer adsorption in the neutral SO42--containing polymer solution, while the adsorption was greatly promoted in the acidic conditions, reducing the permeability.

The polymer adsorption material was CDL-1.

Assuming that polymer retention originated in polymer adsorption, irreversible resistance factors were translated into adsorbed layer thicknesses according to a simple capillary bundle model.

Molecular simulations (Dissipative Particle Dynamics - DPD) were used to quantify the effect of polymer adsorption on the effective shear viscosity of a semi-dilute polymer solution in microchannel Poseuille flow.

The first experimental evidence of polymer adsorption in natural carbonates obtained from streaming potential measurements is presented.

The NZ-incorporated SCCs required a higher dosage of SP for retempering however the pumice contained SCCs required lower SP than the reference due to the low-polymer adsorption of pumice-blended cement.

Optimization was done by central composite design (CCD) to have high efficiency of the polymer adsorption.

Based on published data, graft copolymerization reaction rate equation with velocity and concentration is established and physical process for generated copolymer adsorption is characterized, which agreed with documented experimental facts.

008 to 40 Pa∙s at low shear rate when the LCST is reached, whereas, in the case of polymer adsorption, the viscosity increases only from 0.

The polymer adsorption and mechanical entrapment are discussed more in depth in the literature, though the effect of hydrodynamic retention can be just as significant.

FINDINGS Differences in the average number of adsorbed polyelectrolyte arms and their average charge, and in the relative amount of macroion counterions (m-CI's) released upon polymer adsorption are found between CCTC and SMMSC nanoparticles.

Influence over particle size, morphology, and functionality is shown including the formation of core–shell particles via block copolymer adsorption, functional internally- and externally-structured particles through phase separation, and encapsulations of sensitive active pharmaceutical ingredients by electrostatic interactions.

A better understanding of polymer adsorption to nanoparticles and its conformation under natural groundwater conditions is needed to further elucidate nanoparticle-collector interactions.

The course and efficiency of the polymer adsorption onto the pigment surface was quantified by electrokinetic sonic amplitude measurements.

The combination of results by nitrogen adsorption–desorption and calorimetry (differential scanning calorimetry, DSC) indicates that the nanoparticle surface accessibility by the polymer is dynamic, as it changes non-monotonically with the gradual increasing of polymer adsorption.

The S/S mechanism of the arsenic and heavy metals in the geopolymer matrix mainly involves physical encapsulation of the geopolymer gel, geopolymer adsorption and ion exchange of Friedel’s salt.

The latter fraction, representative of the polymer adsorption onto the nanofillers, is considered important within many applications (thin polymeric films, polymer nanocomposites, etc), furthermore, it is widely believed that RAF dominates the observed improvements of the properties in the nanocomposites.

The saturated adsorption quantity and the ability to reduce the surfactant adsorption loss of the strong alkali were both higher, but the ability to reduce polymer adsorption loss was lower, compared with the weak alkali.

Finally, our theory provides two additional key features as evidenced by previous adsorption experiments: first, the critical counterion concentration for polymer adsorption decreases with the rise of the counterion valency and, second, the addition of monovalent salt enhances the screening of the membrane charges and suppresses monovalent counterion correlations close to the surface.

At the same polymer concentrations, polymer adsorptions onto the rock were comparable with both SmartWater and the higher-salinity injection water.

Polymer adsorption on hydrophilic GPC columns is observed for partially hydrolyzed PVA but not for fully hydrolyzed PVA, which is driven by the hydrophobic interactions between the residual acetate groups on PVA and the stationary phase.