Drop measuring apparatus, and a method of evaluating materials w

Details Drop measuring apparatus, and a method of evaluating materials w Drop measuring apparatus, and a method of evaluating materials w

1976-03-10

1977-09-27

Corbin, John K.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

73 644, 350 85, G01N 1302

Patent

active

040508226

ABSTRACT:
The apparatus comprises means usable in the novel method for evaluating materials wettability, as well as measuring the contact angle of a liquid drop, the same comprising a structure for measuring the height of a drop deposited on a material, in that the height of the drop is indicative of both the contact angle of the drop and the wettability of the material upon which the drop is deposited. Thus, the apparatus comprises a platform on which to receive a drop (directly, or via an interposed substrate or like subject "material") -- of predetermined composition and volume -- and means coupled to the platform for gauging the height of the drop, from its chord interfaced with the platform (or substrate or "material"), to its topmost surface. The novel methods comprehend the measuring of drops on materials, the wettability of which materials needs to be determined, and comparing the derived measurements against "standard" drop measurements of same materials which have acceptable and unacceptable wettability, or comparing the derived measurements against heights of same drops of same volume, the contact angles of which latter drops are known, to ascertain the contact angles of the drops under examination.

REFERENCES:
patent: 3525255 (1970-08-01), Orr
patent: 3535043 (1970-10-01), Hong
patent: 3618374 (1971-11-01), Miller

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