The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 2024
Filed:
Jun. 11, 2021
Purdue Research Foundation, West Lafayette, IN (US);
Hansol Wee, West Lafayette, IN (US);
Brayden W. Wagoner, West Lafayette, IN (US);
Pritish M. Kamat, West Lafayette, IN (US);
Vishrut Garg, West Lafayette, IN (US);
Osman A. Basaran, West Lafayette, IN (US);
Purdue Research Foundation, West Lafayette, IN (US);
Abstract
A method is provided for determining the surface viscosity of a liquid in which a thread is formed from a drop of the liquid. The thread is lengthened and its minimum radius his determined at multiple times between the thread formation and thread pinch-off. The minimum radius and associated time values are used to determine a linear relationship of minimum radius and time, with the coefficient of the linear relationship, or the slope X of the line in the linear relationship, corresponding to the surface viscosity μof the liquid according to one of the following equations: where B=μ/μR in which his defined as above, R is the dimension of the feature on which the drop is provided and μ is the bulk viscosity of the liquid, or in which Oh=μ/√{square root over (ρRσ)}, where μ and R are as defined above, ρ is the density of the liquid, and σ is the surface tension of the liquid without surfactants.