PVP Ultra-low Moisture Conductive Slurry Dispersant

Chemical Name: Polyvinylpyrrolidone
USP/EP Name: Povidone, povidonum
INCI: PVP
CAS NO.: 9003-39-8
Appearance and Properties: White to milky white free-flowing powder, odorless or with a slight characteristic odor.

Main Properties: Non-toxic, non-irritating, hygroscopic, easily soluble in many organic solvents such as water, alcohols, and amines. It has excellent solubility, film-forming property, chemical stability, physiological inertness, adhesiveness, and complexing ability.

Product Standard: Meets the electronic grade.

Specifications and Models: The K value is calculated based on the polymer molecular weight and the viscosity of the aqueous solution, and it is divided into the following models:

 

Model	K Value	Viscosity-average Molecular Weight	Main Applications
K12	10.2 - 13.8	3,000 - 7,000	Used as a solubilizer, dispersant, and crystallization inhibitor in liquid preparations.
K15	12.75 - 17.25	8,000 - 12,000
K17	15.3 - 18.36	10,000 - 16,000
K25	22.5 - 27.0	30,000 - 40,000	Used as a binder, film-forming agent, solubilizer, suspension stabilizer, and dispersant in preparations.
K30	27 - 32.4	45,000 - 58,000
K60	54 - 64.8	270,000 - 400,000	Used as a binder, thickener, and suspension stabilizer in preparations.
K90	81 - 97.2	1,000,000 - 1,500,000

Note: The K value is obtained by converting the kinematic viscosity of a 1% aqueous solution, and the viscosity-average molecular weight is calculated according to the Mark - Houwink formula.

 

Product Characteristics: It can effectively control the moisture content in PVP to be less than 2%.

Main Application Areas: Dispersants for carbon nanotube conductive slurries, graphene conductive slurries, carbon nanotube - graphene composite conductive slurries, etc.

 

Carbon Nanotube Conductive Slurry

In the preparation of composite conductive slurries, PVP is added as a dispersant. To verify the dispersing effect of PVP, suspensions were prepared respectively with and without the use of PVP under ultrasonic treatment. The suspensions were placed in beakers, and their initial states and the states after being placed for 96 hours were compared. The suspension with the PVP dispersant remained a uniform suspension after being placed for 96 hours. The suspensions without the PVP dispersant all showed a delamination phenomenon after being placed for 96 hours. This indicates that PVP can be used to prepare stable carbon nanotube conductive slurries.

--Application example from the Academic Seminar and Technology Exchange Conference on China's Energy Storage and Power Batteries and Their Key Materials

 

Component	Unit	Formula A	Formula B	Formula C	Formula D	Formula F
PVP	%	1.33	1.08	1	1	1.25
Carbon Nanotubes	%	2.8	4.3	5	4	5
Carbon Nanotube Purity	%	> 99.1	> 99.8	> 99.8	> 99	> 99.7
Carbon Nanotube Diameter	nm	5 - 11	7 - 11	10 - 15	7 - 11	13 - 25

 

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