New method for determination of surface tension of liquids
作者:
Toshihiko Ohsawa,
Tadao Ozaki,
期刊:
Review of Scientific Instruments
(AIP Available online 1981)
卷期:
Volume 52,
issue 4
页码: 590-593
ISSN:0034-6748
年代: 1981
DOI:10.1063/1.1136626
出版商: AIP
数据来源: AIP
摘要:
A new method of quickly and precisely measuring the surface tension of liquids and solutions is described. Utilizing the fact that the size of the bubbles formed from a gas flowing out of a nozzle is dependent on the nozzle diameter and the surface tension of the liquid used, the surface tension of a liquid can be determined by simply counting the number of bubbles formed from a gas flowing out at a constant flow rate or by measuring the period of bubble formation. The expected accuracy of the method is below 0.1% of variance. An evident correlation between the period of bubble formation and the surface tension was shown with several kinds of liquids which differ in surface tension. Changes in surface tension with varied degree of neutralization were determined in an aqueous solution of polyacrylic acid (PAA), 20–30 points of measurement with an accuracy of about 0.1% could be easily obtained within one hour.
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