A porous medium flow measurement device and measurement method for nanoemulsion

Abstract

The invention discloses a porous medium flow measurement device for nanoemulsions, which includes a sample preparation system, a sample introduction system and a measurement system; the sample preparation system includes a first sampling pump, a first water storage, a second sampling pump, a Two water reservoirs, the first intermediate container, the second intermediate container, the first mixing chamber, the second mixing chamber, the third sampling pump, the fourth sampling pump, the fourth water storage, the fourth intermediate container, and a mechanical mixer , electromagnetic heating stirrer and magnet; the sampling system includes the sixth sampling pump, the sixth water storage, the sixth intermediate container, the seventh intermediate container, valve one, valve two, fifth sampling pump and multi-way valve The measurement system includes a core holder, a core, a pressure acquisition system, a pressure gauge, an eighth sampling pump, an eighth water storage, a pressure gauge two, a valve three and a metering container. The present invention also provides a measurement method for the porous medium flow of the nanoemulsion by using the above-mentioned device. The invention improves the reproducibility, accuracy and usability of flow experiment data.

Description

technical field [0001] The invention relates to the technical field of testing fluid flow in porous media, in particular to a porous medium flow measurement device and a measurement method for nanoemulsions. Background technique [0002] Nanoemulsion refers to a colloidal dispersion system formed by two immiscible liquids, and the droplet size range is generally between 50 and 500 nm. Compared with microemulsion, nanoemulsion has small droplet size and uniform particle size, and the amount of emulsifier is greatly reduced; compared with ordinary emulsion, nanoemulsion has the advantages of uniform dispersion and good stability. Nanoemulsions can be used in many fields such as medicine, catalysis, food, petroleum and cosmetics, and have very good application prospects. [0003] When the emulsion flows in the porous medium, due to its multi-phase dispersion, the flow process is very complicated, so the understanding of the seepage law of the emulsion is still not completely c...

AI Technical Summary

Problems solved by technology

However, due to the thermodynamic instability of the current nanoemulsion particle size, it is easy to make the measurement of the flow law of the nanoemulsion difficult to repeat and reproduce, which greatly limits the application of the nanoemulsion.

Patent CN201310130666 has made a polymer-stabilized nanoemulsion through the inverse emulsification method. The method provided is to add the emulsifier and the water phase dropwise, but it takes a long time to prepare the nanoemulsion in this way, and the prolongation of the preparation time It can also lead to changes in the particle size and distribution of nanoparticles

In addition, the transfer between containers during the measurement process of the prepared nanoemulsion will produce a shearing effect on the nanoemulsion particles, and the external shear stress also has a great influence on the particle size and other properties of the nanoemulsion, which will lead to The inaccuracy and non-reproducibility of the measurement results, which in turn affects the evaluation of the application effect

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