Can the solution of alumina dispersant increase the dispersion fluidity and improve the solid conten

Scope of application: This product is suitable for kaolin, barium sulfate, titanium dioxide, talc, carbon black, graphite, silica, silicon carbide, silicon nitride, whisker calcium, aluminum hydroxide, magnesium hydroxide, alumina, magnesium oxide, cerium oxide, zirconia, mica powder, silicon dioxide, carbon nanotube, rare earth, zirconium silicate, ceramic pigments, ceramic composite powder, etc.

Performance characteristics: Powder dispersant AD8030 can be adsorbed on the surface of various tiny particles and produce electrostatic repulsion to disperse them, avoiding sedimentation and coarseness. It can be used as a dispersant for paper coatings and architectural coatings, concrete retarder, water reducer and textile printing and dyeing industries, and can be used as a dispersant for coatings, pigments, paints, papermaking, kaolin, alumina, clay, titanium dioxide, talc, barium sulfate, coal-water slurry, calcium carbonate and cement dispersant.

Your question seems to be "because the dispersant I am talking about is relative to the dispersion system"How can a dispersant be made to make it have a high solids content? Better dispersion?

I feel what you're saying"Dispersants"I guess it's dispersion.

Because we generally only talk about the solid content of the dispersion, if it is a solution, its solid content is related to the temperature (generally the higher the easier it is to dissolve) and the type of dispersant (the more similar the polarity, the more soluble).

And colloidal words.

The smaller the particles, the more stable.

The lower the temperature, the more stable it is.

There are also particles that must have the same kind of charge.

As for the turbidity, it will always sink in the end.

It's boring.

Good category forgot.

Give extra points.

Powder dispersant AD8085 (abbreviation: Auda graphene dispersant is a water-based environmental protection material, suitable for water-based systems (that is, the solvent is water), and oil-based systems need to be matched and tested. It integrates hydrophilicity, depolymerization, dispersion, flow, improvement of solid content and wetting, which can be adsorbed on the surface of various tiny particles and generate electrostatic repulsion to disperse them, avoiding sedimentation and coarseness.

When added during slurrying, the hydrophobic material can be evenly dispersed in the water and the quality of grinding can be improved.

Added in the grinding process of the slurry, can quickly reduce the viscosity of the slurry, increase the dispersion, fluidity, quickly improve the solid content, the viscosity of the slurry after dispersion is stable, no return to thickening, does not affect the filter drying of the later process, and the powder after drying does not agglomerate.

Usage and Dosage:

1. When wet grinding, mix evenly in the slurry. Hydrophobic powder enhances hydrophilic properties, please add a little before slurry mixing, so that the powder is evenly dispersed in water. The amount of addition is calculated according to the different requirements of customers, calculated by the solid content of the powder, and the addition of the powder is about and about.

Whether graphene dispersant can reduce the viscosity of the slurry, you can consult the technical staff of the merchant.

Polyammonium methacrylate is better, polyethylene glycol effect is also OK, if you want to get some sodium hexametaphosphate effect cheaper, citric acid trisodium citrate dispersion effect is also very good when the appropriate amount is added, but unfortunately the appropriate amount I did before was too narrow, and there is a kind of polycarboxylate dispersion effect is very good, but it may not be easy to buy.

Alkoxyl alcohol dispersants can be added directly to the acidic system, and the weak acid environment does not matter, so there is no need to worry about esterification or anything. I'm afraid that decentralized systems rarely make PH<3.

In addition, these dispersants have their corresponding appropriate dosage and pH range, if you just try to use it well, it is simple, if you want to systematically study how to characterize (concentrated dispersion?). The issue of dispersion effect requires careful consideration.

In addition to the use of electrostatic repulsion, that is, the negative charges adsorbed on the surface of the particles repel each other, in order to prevent the adsorption aggregation between particles and finally form large particles and stratified sedimentation, the formation of a stable dispersion system should also use the theory of steric hindrance, that is, when the particles that have adsorbed the negative charge are close to each other, they slide and stagger each other.

Such steric surfactants are generally nonionic surfactants. By flexibly applying the theory of electrostatic repulsion and steric resistance, a highly stable dispersion system can be formed. The polymer adsorption layer has a certain thickness, which can effectively block the mutual adsorption of particles, mainly relying on the solvation layer of the polymer.

Mechanism of dispersant:

1. Adsorption on the surface of solid particles to reduce the interfacial tension between liquid-liquid or solid-liquid. Makes the surface of the condensed solid particles easy to wet.

2. The polymer dispersant forms an adsorption layer on the surface of the solid particles, which increases the charge on the surface of the solid particles and improves the reaction force between the particles that form a three-dimensional obstruction.

3. The surface of the solid particles forms a bilayer structure, and the polar end of the outer dispersant has a strong affinity with water, which increases the degree of wetting of the solid particles by water. Solid particles move away from each other due to electrostatic repulsion.

4. Make the system uniform, increase the suspension performance, and not precipitate, so that the physical and chemical properties of the whole system are the same. As mentioned above, the use of dispersants can stably disperse solid particles in liquids.

The dispersants used in water-based coatings must be water-soluble, and they are selectively adsorbed to the powder-water interface. Commonly used are anionic types, which are ionized in water to form anions and have a certain surface activity, which is adsorbed by the surface of the powder. After adsorbing the dispersant on the surface of the powdered particles, an electric double layer is formed, and the anions are tightly adsorbed by the surface of the particles, which is called surface ions.

Oppositely charged ions in a medium are called counterions. They are electrostatically adsorbed by surface ions, and some of the counterions are tightly bound to particles and surface ions, and they are called bound counterions. They become a moving whole in the medium with a negative charge, surrounded by another part of the anti-ions, which are called free anti-ions, forming a diffusion layer.

This creates an electric double layer between the surface ions and the counterions.

Electrodynamic potential: The negative charge carried by the particles and the positive charge carried by the diffusion layer form an electric double layer, which is called the electrodynamic potential. Thermopotential:

An electric double layer formed between all anions and cations, corresponding potentials. It is the electrodynamic potential rather than the thermoelectric potential that plays a dispersive role, the electrodynamic potential charge is unbalanced and there is a phenomenon of charge repulsion, while the thermoelectric potential belongs to the phenomenon of charge equilibrium.

If the concentration of counterions in the medium increases, and the free counterions in the diffusion layer will be forced into the bound counterion layer due to electrostatic repulsion, so that the electric double layer is compressed, the electrodynamic potential decreases, and when all the free counterions become bound counterions, the electrodynamic potential is zero, which is called the isoelectric point. There is no charge repulsion, and the system has no stability and flocculation.

The basic principle of the dispersant RQT-FS acts as a cross-link, allowing inorganics and organic solvents to be mixed together. It plays the role of uniform dispersion and exerts the role of these additives to the extreme.

A: Three dispersants, including sodium dodecyl sulfate (DSS), polyvinyl alcohol (PEG) and sodium hexametaphosphate (NAP), have been studied by particle size analysis and determination of zeta potential, so polyvinyl alcohol can be used as a dispersant. Polyvinyl alcohol is a water-soluble, highly polymeric with properties between plastic and rubber, and is quite versatile.

In addition to vinylon fiber, it is also widely used in the production of coatings, adhesives, fiber slurries, paper processing agents, emulsifiers, and dispersants. Dispersants are the constituent substances of colloids, while dispersants can be divided into gases, liquids and solids. Because polyvinyl alcohol is a water-soluble highly polymer, it is a liquid substance, so it can be used as a liquid dispersant.

Generally, there are two sets of decentralized systems.

1。For aqueous systems, nitric acid (10%) or acetic acid is recommended2. Solvent-based requires the addition of some solvent-based dispersants.

Of course, it also depends on the nature of your alumina, I know that a kind of water dispersion can be alpha-alumina, which is not easy to disperse itself, add more acid.

Look for nanodispersants.

As a special BAI ceramics, the preparation of qualified slurry has a great impact on the product's performance, and the preparation of dispersant in the qualified slurry is a must.

Less. Therefore, the advantages and disadvantages of dispersants and the use technology of dispersants have been paid more and more attention by users. In this paper, acrylamide and acrylic acid were used as raw materials and solution polymerization was used to polymerize acrylamide and acrylamide monomers, and then neutralized to generate polyacrylamide and ammonium polyacrylate.

In the experiment, the orthogonal method was used to optimize the synthesis conditions, and the effects of monomer concentration, initiator dosage, dosage and other factors on the reaction were discussed. By chemical analysis. The product was characterized by infrared spectroscopy, differential thermal analysis and other test methods, and it was used for grouting molding of alumina slurry.

The results show that compared with CMC and other dispersants, PAM and PAANH4 have the advantages of low dosage, high solid content and good fluidity of the obtained slurry. However, on the whole, PAANH not only overcomes the shortcomings of PAM's strong wettability and easy to stick to the mold, but also significantly improves the physical properties of alumina ceramics.