Powder Contact Angle

Exponential Business and Technologies Company

Bridging You and Nano

For fine powders, a surface tensiometer can be adapted for powder contact angle measurements with the appropriate attachments. The measurement of the contact angle is based on the Washburn equation and the application of a high-resolution scale. This method provides an alternative to contact angle measurements through a contact angle meter for powders less than 10 microns in diameter.

Typical Experimental Results:

Powder Contact Angle and Capillary Radius for a Grain Flour

Sample	Contact Angle (deg)	Capillary Radius (µm)
Flour A	85.06	270.45
Flour B	86.09	295.84
Flour C	87.73	201.96

powder contact angle1

Powder contact angle of Flour A

Powder Contact Angle 2

Powder contact angle of Flour B

Powder Contact Angle 3

Powder contact angle of a Flour C

Applications:

Capillary Radius	Ceramic Powders	Grain Powders
Fine Powders	Ground Coffee	Hydrophilic Powders
Metal Powders	Organic Powders	Powder Wettability
Sugars	Temperature Control	Washburn Method

For more information please read our application notes.

Instruments: Kyowa DyneMaster DY-700 Surface Tensiometer

dy700 Key Specifications:

Measurement Range	0-100 m N/m
Contact Angle Range	0 – 90°
Display Resolution	0.01 m N/m
Repeatability	0.02 m N/m
Sample Volume	20 mL – Petri Dish 50 mL - Vessel
Stage Movement Range	50 mm
Stage Movement Speed	0.002 – 50 mm/s