scholarly journals Interaction of Different Charged Polymers with Potassium Ions and Their Effect on the Yield Stress of Highly Concentrated Glass Bead Suspensions

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1490
Author(s):  
Zichen Lu ◽  
Simon Becker ◽  
Sarah Leinitz ◽  
Wolfram Schmidt ◽  
Regine von Klitzing ◽  
...  
Keyword(s):  
Yield Stress ◽  
Glass Bead ◽  
Potassium Ions ◽  
Colloidal Probe ◽  
Force Microscopy ◽  
Atomic Force ◽  
Charged Polymers ◽  
Depletion Force ◽  
Glass Bead Suspension ◽  
Bead Suspension

The interaction of different charged polymers, namely anionic polycarboxylate superplasticizer (PCE) and neutral polyethylene glycol (PEG) with potassium ions, and their effect on the yield stress of highly concentrated glass bead suspension (GBS), were studied under different concentrations of potassium ions ([K+]). It was found that, compared to the neutral PEG, the negatively charged PCE can be adsorbed on glass beads (GB), and then decreases the yield stress of GBS. The increasing concentration of free polymer in the interstitial liquid phase with the increased polymer dosage leads to the higher yield stress of GBS, which may be caused by the higher depletion force. In addition, this effect is also related to the charge density of the polymer and the [K+] in the solution. Along with the increase in [K+], the yield stress of GBS increases significantly with the addition of PCE, but this cannot be observed with PEG, which indicates that potassium ions can interact with negatively charged PCE instead of the neutral PEG. At last, the interparticle forces between two single GB with adsorbed PCE in solutions containing [K+] and PCE were measured by colloidal probe atomic force microscopy to better understand the interaction of the charged polymer with counterions.

Dynamics and metastable surface structure of double atomic layer of water molecules and ions at the interface between KBr(c) and water

2004 ◽  
Vol 76 (1) ◽  
pp. 115-122 ◽  
Author(s):  
K. Ichikawa ◽  
S. Sato ◽  
N. Shimomura
Keyword(s):  
Surface Structure ◽  
Vertical Motion ◽  
Atomic Layer ◽  
Water Molecules ◽  
Potassium Ions ◽  
Force Microscopy ◽  
Structure And Dynamics ◽  
Atomic Force ◽  
Bromide Ions

The metastable surface structure and dynamics of water molecules, cations, and anions at the interface between KBr(001) and water have been demonstrated from the images in situ observed in atomic resolution using atomic force microscopy. The vertical motion of potassium ions, which means their own transfer from the equilibrium sites to the upper height right on the underlying bromide ions, has been observed at the interface. They are used to be located in some steady state stabilized by their interaction with water molecules in the double atomic layer at the interface. The observed water molecules bridge two bromide ions by hydrogen bond; the water molecules are sandwiched by the potassium ions and vice versa.

Contribution of AFM Observations to the Understanding of Ni3Al Yield Stress Anomaly

2011 ◽  
Vol 61 ◽  
pp. 71-77
Author(s):  
Joël Bonneville ◽  
Dimitri Charrier ◽  
Christophe Coupeau
Keyword(s):  
Atomic Force Microscopy ◽  
Yield Stress ◽  
Intermetallic Compounds ◽  
Ordered Structure ◽  
Practical Situation ◽  
Force Microscopy ◽  
Atomic Force ◽  
Ni3al Intermetallic

We report in the present paper a practical situation where the use of atomic force microscopy allowed an irrefutable insight in material plasticity for discriminating between different modelling hypotheses concerning the yield stress anomaly of Ni3Al intermetallic compounds with the L12 ordered structure. The contribution of AFM to a better understanding of elementary rate controlling mechanisms as well as collective dislocation motions is highlighted.

Stratification of Colloidal Particles on a Surface: Study by a Colloidal Probe Atomic Force Microscopy Combined with a Transform Theory

2018 ◽  
Vol 122 (16) ◽  
pp. 4592-4599 ◽  
Author(s):  
Ken-ichi Amano ◽  
Taira Ishihara ◽  
Kota Hashimoto ◽  
Naoyuki Ishida ◽  
Kazuhiro Fukami ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Colloidal Particles ◽  
Colloidal Probe ◽  
Force Microscopy ◽  
Atomic Force ◽  
Surface Study

scholarly journals Measurement of Interaction Forces between Montmorillonite Particles in NaCl Solutions using a Colloidal Probe Atomic Force Microscopy

2006 ◽  
Vol 5 (3) ◽  
pp. 251-256
Author(s):  
Susumu KUROSAWA ◽  
Masashi MIZUKAMI ◽  
Hisao SATO ◽  
Jun NOZAWA ◽  
Keiichi TSUJIMOTO ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Interaction Forces ◽  
Colloidal Probe ◽  
Force Microscopy ◽  
Atomic Force

Colloidal Probe AFM Measurements of the Electrophoretic Force

2006 ◽  
Vol 314 ◽  
pp. 1-6
Author(s):  
Linda Stappers ◽  
Jan Fransaer
Keyword(s):  
Atomic Force Microscopy ◽  
Electric Fields ◽  
Colloidal Probe ◽  
Force Microscopy ◽  
Colloidal Interactions ◽  
Atomic Force ◽  
Cantilever Surface ◽  
Preliminary Study ◽  
High Electric Fields ◽  
Oriented Parallel

Colloidal probe atomic force microscopy is a very useful tool in the study of colloidal interactions. Although this technique has been applied to study interactions between a particle and a polarized electrode during electrodeposition, it has never been used to study interactions in high electric fields as encountered in electrophoretic deposition. In this work, a preliminary study was undertaken to verify whether colloidal probe AFM could be used to measure the electrophoretic force on a particle. It was found that the electrophoretic force could be detected by colloidal probe AFM under certain circumstances. In order to prevent that the contribution of the cantilever on the measurement of the electrophoretic force becomes large, the charge on the cantilever should be small compared to the charge of the particle, which is attached to the cantilever. Moreover, the area of cantilever surface which is oriented parallel to the electric field should be small to minimize the contribution of the cantilever.

Measurement of Interactions between Abrasive Silica Particles and Copper, Titanium, Tungsten and Tantalum

2007 ◽  
Vol 991 ◽  
Author(s):  
Ruslan Burtovyy ◽  
Alex Tregub ◽  
Mansour Moinpour ◽  
Mark Buehler ◽  
Igor Luzinov
Keyword(s):  
Ph Value ◽  
High Sensitivity ◽  
Model Systems ◽  
Thin Polymer Film ◽  
Colloidal Probe ◽  
Force Microscopy ◽  
Atomic Force ◽  
Afm Cantilever ◽  
The Moment ◽  
Silica Slurry

ABSTRACTColloidal probe technique has been widely employed to measure the adhesion between micro- and nanosize objects using atomic force microscopy (AFM). However, majority of studies concerns model systems, which do not incorporate real abrasive particles. The approach applied allows measuring adhesion between real CMP nanoparticles and different surfaces. Thin polymer film with high affinity to the particles was used to anchor the particles to a surface. Hollow glass bead (20-30 μm) representing flat surface was attached to soft AFM cantilever. Application of large hollow bead and the cantilever with small spring constant allows measuring the interactions with high sensitivity. Titanium, tungsten and tantalum metals were sputtered on the bead surface. The effect of different factors such as pH value, concentration and type of a surfactant on adhesion between surfaces of metals and silica slurry has been studied. Character and intensity of interactions at the moment of contact have been evaluated from experimental force-distance curves.

Hydrogen-Bonded Macrocluster Formation of 1-Propanol and 2-Propanol on Silica Surfaces

2003 ◽  
Vol 56 (10) ◽  
pp. 1071 ◽  
Author(s):  
Masashi Mizukami ◽  
Kazue Kurihara
Keyword(s):  
Hydrogen Bonding ◽  
Long Range ◽  
Hydroxyl Groups ◽  
Similar Amount ◽  
Colloidal Probe ◽  
Force Microscopy ◽  
Silica Surfaces ◽  
Atomic Force ◽  
Aggregation Structure ◽  
Hydrogen Bonded

We have investigated the adsorption of 1- and 2-propanol on silica surfaces from their mixtures with cyclohexane using a combination of colloidal probe atomic force microscopy, adsorption excess isotherms, and FTIR spectroscopy in the ATR mode. The adsorption isotherm indicated that a similar amount of each alcohol was adsorbed on the silica surfaces. FTIR spectra revealed that 1-propanol adsorbed on the surface employing hydrogen-bonding between the surface silanol groups and the hydroxyl groups of 1-propanol as well as between the hydroxyl groups of 1-propanol in the form of a linear zig-zag structure. This structure is similar to the linear hydrogen-bonded structure of ethanol, which we have found on silica and called a ‘surface molecular macrocluster’ (M. Mizukami, M. Moteki, K. Kurihara, J. Am. Chem. Soc. 2002, 124, 12 889). The contact of adsorbed layers of 1-propanol on the opposed silica surfaces brought about the long-range attraction extending to 69 ± 9 nm at 0.1 mol-% 1-propanol. 2-Propanol was also adsorbed on the surface by the hydrogen-bonding, however, in the form of a cyclic structure. No long-range attraction was observed in the 2-propanol/cyclohexane binary liquids at 0.1–6.0 mol-%. The absence of a long-range attraction can be explained by the cyclic aggregation structure of 2-propanol on the surface.

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