Name: PVP K30 (K29-32) polyvinylpyrrolidone
Brand: Canrud
Price: 18.12 USD

Question 1

Accepted Answer

The main difference K88-96 polyvinylpyrrolidone PVP K30 and PVP is the average molecular weight, PVP K30 has a molecular weight of 58,000, while PVP K88-96 has a molecular weight of up to 1,300,000. This leads to differences in their physical properties (such as solubility and viscosity) and application areas. PVP K30 is suitable for scenarios that require medium viscosity and good solubility, while PVP K88-96 is suitable for applications that require higher viscosity and greater film-forming ability.

Question 2

Accepted Answer

The main difference K88-96 PVP K30 (K29-32) and PVP is their average molecular weight (58,000 vs. 1,300,000), which leads to significant differences in solubility, viscosity, film-forming properties, and application areas. PVP K30 is suitable for applications requiring good solubility and moderate film-forming properties, such as plant enzyme purification and chromatography, while PVP K88-96, due to its higher molecular weight, may be more suitable for applications requiring high viscosity, strong film-forming properties and higher mechanical strength, such as drug delivery systems or industrial material modification. This conclusion is based on reasonable inferences from the knowledge base description of the molecular weight and application properties of the two PVPs.

Question 3

Accepted Answer

The dispersant for the carbon nanotube powder 2001 can be PVP, CMC or PVDF, with PVP being the most commonly used dispersant. This is inferred from the type of known carbon nanotube dispersants. If more specific advice is needed, it may be necessary to further understand the specific characteristics and application scenarios of carbon nanotube powder 2001.

Question 4

Accepted Answer

Commonly used dispersants for carbon nanotubes include PVP (polyvinylpyrrolidone), CMC (carboxymethyl cellulose) and PVDF (polyvinylidene fluoride), with PVP being the most commonly used dispersant. This is based on practice in commercial applications.

Question 5

Accepted Answer

Yes, polyvinylpyrrolidone (PVP K88-96) can be used as PVP material for mixing KB (carbon black), and is suitable for dispersion of conductive agent due to its good dispersion performance. However, the specific applicability needs to be further verified according to the actual application scenario, solvent system and dispersion process.

Question 6

Accepted Answer

If both PVP materials are PVP K88-96, they have the same performance and applicability. If there is miswriting of other materials, it is concluded that PVP K88-96 is more suitable for mixed KB because of its high molecular weight and excellent dispersion properties.

Question 7

Accepted Answer

In the NMP solvent system, the dispersion of carbon nanotube (CNT) paste can use PVDF, but it is mainly used as a binder, and has a certain dispersion auxiliary effect. A more efficient and commonly used dispersant is PVP. Therefore, strictly speaking, the statement that "the dispersant of carbon nanotube slurry (NMP solvent) is PVDF" is not accurate. It should be amended to: PVDF can help disperse CNT in NMP system, but the more effective dispersant is PVP and other special additives.

Question 8

Accepted Answer

In the water-based carbon nanotube slurry, the commonly used dispersant is CMC (carboxymethyl cellulose), especially when used in combination with CMC/SBR binding system. While PVP is also commonly used for the dispersion of CNTs, in aqueous systems, CMC is the dominant choice due to its good stability and system compatibility. This is an inference based on applied feedback from actual battery processes.

Question 9

Accepted Answer

Yes, aqueous single-walled carbon nanotubes (CNTs) can be used as a conductive agent for sodium-ion batteries. According to the knowledge base, single-walled CNTs have been used in high performance battery systems, and there are dispersion means suitable for aqueous systems (such as using CMC or PVP as a dispersant). Since the conductivity requirements of sodium ion battery electrodes are similar to those of lithium batteries, and water-based slurry (such as CMC/SBR) is the process system commonly used for sodium negative electrodes, water-based single-walled CNT can fully adapt and improve the rate performance and cycle stability of sodium ion batteries. This is a reasonable inference based on material commonality and existing process compatibility.

Question 10

Accepted Answer

The typical use method of single-walled carbon nanotubes is to make it into a dispersion (such as oily or aqueous conductive liquid), and directly add it to the battery pole piece slurry and mix it with the active material and the binder. Before use to ensure that it is fully dispersed, in order to play its excellent conductive properties. If it is self-dispersing, it is recommended to choose a suitable dispersant (such as PVP, CMC, etc.), and use high-speed stirring or sanding to improve the dispersion effect.

Question 11

Accepted Answer

Dry electrode process can choose the binder PVDF, PTFE, SBR, thermoplastic elastomer, PAA and its derivatives, PVP, PAN and modified cellulose. The material characteristics, process conditions and battery performance requirements should be considered when selecting the appropriate binder. With the advancement of technology, more new binders suitable for dry process may be developed in the future.

Question 12

Accepted Answer

The solvent of the water-based carbon nanotube (CNT) is water. Although CNTs themselves are not soluble in water, they can form a stable suspension slurry in water after the addition of a dispersant (such as CMC or PVP). This system is called "water system". Among them, water acts as a dispersion medium and acts as a solvent. According to the description of "water-based CNT paste" compatible with CMC/SBR aqueous system in the knowledge base, it can be confirmed that the basic solvent is water.

Question 13

Accepted Answer

Yes, the solvent for aqueous SWNTs (CNTs) is water. Although CNTs themselves are not soluble in water, they can form a stable suspension slurry in water after the addition of a suitable dispersant (such as CMC or PVP). This system is called "water system". Among them, water acts as a dispersion medium and acts as a solvent. According to the description of "water-based CNT paste" compatible with CMC/SBR aqueous system in the knowledge base, it can be confirmed that the basic solvent is water.

PVP K30 (K29-32) polyvinylpyrrolidone

Details