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[Terminology] Wetting phenomena

Time: 2015-07-20 21:41:46; Count: 27

[Terminology] Wetting phenomena

Wetting phenomena include three classes: (1), adhesion; (2), immersion; (3), spreading.

 

(1), adhesion

 

The process which a solid, previously in contact with a gaseous phase, is brought into contact with a liquid phase.

 

Typical adhesion wetting phenomena, such as: when it rains, clothes were wet.

 

(2), immersion

 

The process which a solid is immersed into a liquid.

 

Typical immersion wetting phenomena, such as: the clothes washing process.

 

(3), spreading

 

The process which a liquid spontaneously forms a well-distributed thin liquid layer on a solid.

 

Typical spreading phenomena, such as: photographic film production process.

 

In fact, a system which spreading can spontaneously form, adhesion and immersion wetting can occur inevitably.

Surfactant

gamma-Oryzanol

Diflucortolone valerate

Betamethasone valerate

Megestrol acetate

Betamethasone acetate

Standard

Test methods of surfactants, catalog, Chinese national standards

Surfactants, catalog, Chinese national standards