Conductive ink high shear nano disperser

Conductive oil grinding and dispersing machineGold based conductive ink grinding and dispersing machine, silver based conductive ink grinding and dispersing machine, copper based conductive ink machine, carbon based conductive ink machine submerged dispersion andThe motor drives the rotating teeth (also known as the rotor) to rotate at high speed relative to the matching fixed teeth (also known as the stator) through a belt drive. The processed material is pressurized by its own weight or external pressure (which can be generated by a pump) to generate a downward spiral impact force. Through the gap between the fixed and rotating teeth of the colloid mill (adjustable gap), it is subjected to strong physical effects such as shear force, friction force, and high-frequency vibration, effectively emulsifying, dispersing, and crushing the material, achieving the effect of ultrafine crushing and emulsification of the material.

Conductive inkA paste ink made by dispersing conductive materials (gold, silver, copper, and carbon) in a binder, commonly known as paste ink. Conductive ink has a certain degree of conductivity and can be used for printing conductive dots or conductive lines. It is composed of conductive fillers, adhesives, solvents, and additives. Conductive fillers use silver powder and copper powder with excellent conductivity, and sometimes gold powder, graphite, and carbon black are also used (there are now specialized ones available)Conductive carbon black）Carbon fiberNickel powderWait. Synthetic resins used as adhesives include epoxy resin, alkyd resin, acrylic resin, polyurethane resin, melamine formaldehyde resin, phenolic resin, vinyl chloride vinyl acetate copolymer resin, etc. The volume is the melting point (120-230 ℃) of the silk screen ink used to dissolve these resins. In addition, additives such as dispersants, lubricants, coupling agents, etc. can be added as needed. The characteristics required for conductive ink include conductivity (anti-static), adhesion, printability, and solvent resistance.

Carbon nanotubes have been applied in conductive coatings, conductive inks, conductive adhesives, lithium-ion battery electrode materials, and other composites. A carbon nanotube slurry with high carbon nanotube content and high fluidity has been developed, which is an economical dispersion product

1、 Three elements of carbon nanotube dispersion technology

2、 Recommended dosage of dispersant

3、 Overview of Carbon nanotube Water Dispersant (TNWDIS)

4、 Suggestions for using ultrasonic dispersion equipment and dispersion examples

5、 Suggestions for using grinding and dispersing equipment

Three elements of carbon nanotube dispersion technology: dispersion medium, dispersant, and dispersion equipment

1. Dispersing medium

(1) According to different viscosities, dispersing media are divided into three types: high viscosity, medium viscosity, and low viscosity. In low viscosity media such as water and organic solvents, carbon nanotubes are easily dispersed. Medium viscosity media such as liquid epoxy resin, liquid silicone rubber, etc., high viscosity media such as molten plastics

(2) The carbon nanotube dispersion technology introduced in this PPT file is aimed at medium and low viscosity dispersion media

2. Dispersant

(1) The selection of dispersants is closely related to the structure, polarity, solubility parameters, etc. of the dispersion medium

(2) The dosage of dispersant is related to the specific surface area of carbon nanotubes and the functional groups modified by covalent bonds

(3) In aqueous media, it is recommended to use TNWDIS. In strongly polar organic solvents such as alcohols DMF、NMP， Recommend using TNADIS. Medium polarity organic solvents such as esters, liquid epoxy resins, and liquid silicone rubber are recommended to use TNEDIS

3. Distributed equipment

(1) Ultrasonic dispersion equipment: very suitable for laboratory scale, low viscosity media dispersion of carbon nanotubes, but limited when used in medium and high viscosity media

(2) Grinding and dispersing equipment: suitable for large-scale dispersion of carbon nanotubes and dispersion of carbon nanotubes in medium viscosity media

(3) The combination method of "grinding and dispersing first, followed by ultrasonic dispersion" can efficiently and stably disperse carbon nanotubes

Recommended dosage of dispersant

The focus of this session is to introduce the carbon series conductive inkIts main components are water, water-soluble resin, water-soluble wax, micro scale graphite, nano conductive carbon black, as well as dispersants, thickeners, defoamers and other additives; Specially added epoxy silane coupling agent to increase the adhesion between the printing film and the substrate. This carbon based water-based conductive ink has good conductivity, strong adhesion with the substrate, and good environmental resistance, friction resistance, and durability of printed products. It is suitable for various types of paper, glass, ceramics, metal, and plastic films, and can be used to manufacture film switches, flexible circuit boards, as well as the back cathode of solar photovoltaic panels, EL, OLED cold light panels, etc

The refining effect of a grinding and dispersing machine is generally stronger than that of a homogenizer, but it has a stronger adaptability to materials (such as high viscosity and large particles). Therefore, in many cases, it is used in the front of a homogenizer or in high viscosity situations

XMD2000 imported ultra-high shear grinding and dispersing machine
Grinding and dispersing machine is a high-tech product composed of colloid grinding and dispersing machines.

The first level consists of three-level sawtooth protrusions and grooves with increasing precision. The stator can be infinitely adjusted to the desired distance between the rotors. Under enhanced fluid turbulence. The groove can change direction at each level.
The second stage is composed of a stator. The design of the dispersing head also effectively meets the needs of substances with different viscosities and particle sizes. The difference in the design of the stator and rotor (emulsifying head) between online and batch machines is mainly due to the requirements for conveying performance. It is particularly important to note that the difference between coarse precision, medium precision, fine precision, and other types of working heads is not only the arrangement of specified rotor teeth, but also an important difference in the geometric characteristics of different working heads. The width of the slot and other geometric features can alter the different functions of the stator and rotor working heads.

The following is a model table for reference:

Conductive ink high shear nano disperser