Method for measuring dispersity of polymer solution based on interdigital electrode

Abstract

The invention belongs to the technical field of measurement of dispersity of a polymer solution, and specifically relates to a method for measuring the dispersity of the polymer solution based on an interdigital electrode. The method comprises the following steps: (1) setting the wavelength number and the detection depths of a single interdigital electrode and the size of an interdigital electrodearray; (2) measuring a capacitance which takes a to-be-measured polymer upper solution and a bottom solution as media, thus selecting an interdigital electrode capacitor model; (3) clinging the interdigital electrode array to the inner wall of a to-be-measured container; (4) putting a to-be-measured polymer solution in the to-be-measured container; (5) leading out the interdigital electrode arraythrough a guide line, and connecting the interdigital electrode array with capacitance measurement equipment, thus acquiring an equivalent capacitance C eq, ijk of the polymer solution in different detection depths in real time; (6) calculating an equivalent dielectric constant epsilon eq, ijk of the polymer solution at different sampling points and a deviation value S of the epsilon eq, ijk, wherein the smaller the S is, the dispersity of the to-be-measured polymer solution is better, and the solution is more stable.

Description

technical field [0001] The invention belongs to the technical field of polymer solution dispersion measurement, and more particularly relates to a polymer solution dispersion measurement method based on interdigital electrodes. Background technique [0002] The homogeneous mixture formed by polymer dispersed in a solvent in a molecular state is called a polymer solution, which belongs to a colloidal system and has a wide range of applications in chemical engineering, energy industry, material science and other fields, especially because the system can synthesize the solvent in the solution. The physical and chemical properties of both solute and solute play an important role in the field of new material development. The polymer solute dissolves in the solvent through two processes of swelling and dispersion, and the dispersibility is often an important indicator to measure the quality of the polymer solution. The polymer solution with good dispersibility is used in other pro...

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a method for measuring the dispersion of polymer solutions based on interdigitated electrodes, the purpose of which is to test and analyze the dielectric constant of the polymer solution to be measured through the interdigitated electrode array Obtain its dispersion, thereby solving the technical problems of the prior art polymer solution dispersion measurement method that cannot be detected on-line in real time, limited scope of application, high cost, etc.

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