A method for measuring performance parameters of micro-nano particles

Abstract

The invention discloses a method for measuring performance parameters of micro-nano particles, comprising: building a measurement system for performance parameters of micro-nano particles; the system includes a detection vessel, a constant temperature control regulator, an ultrasonic module, a noise reduction module, and a signal analysis and processing module , using the ratio of the backscattering intensity of free micro-nano particles to ultrasonic waves in the solid-liquid continuous phase medium to the incident intensity, as well as parameters such as sound pressure, particle concentration, particle size, medium viscosity, and medium density to calculate the characteristic mechanical parameters of the particles; The method of the present invention can realize accurate detection of elastic coefficient and surface tension of micro-nano particles under the same test system and test environment, and provide accurate experimental data for studying the relationship between elastic coefficient and surface tension, so that a more in-depth understanding can be achieved The characteristics of the material can improve the service life and quality of the material.

Description

technical field [0001] The invention relates to the measurement of characteristic mechanical performance parameters of micro-nano particles, in particular to a method for measuring the performance parameters of micro-nano particles. Background technique [0002] The characteristic mechanical performance parameters of micro-nano particles, especially the surface tension and elastic coefficient, are closely related to the stability of the particles. By studying and testing the characteristic mechanical performance parameters of micro-nano particles, we can better study under what conditions micro-nano particles are the most stable and have the longest service life, and we can also obtain the maximum stable critical point of particles under the action of the outside world, etc. Important information, so that the particles can be used stably and for a long time by controlling the external conditions. Nanomaterials refer to solid materials composed of extremely fine particles wi...

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Problems solved by technology

[0006] Disadvantages: This detection method is applied to the detection of solid-liquid interface, and it is the detection of macromolecules. It cannot be used for the detection of micro-nano level and other contact surfaces.

[0013] Disadvantages: a. It can only be regarded as an empirical method so far; b. It cannot be used to measure the surface tension that reaches equilibrium slowly, and at the same time, this method cannot achieve complete equilibrium; c. There are accurate determination of liquid volume and good control of liquid Droplet speed and other issues; d. It is only applicable to liquids, and at the same time, the particle size of the droplets cannot meet the requirements of the micro-nano level

[0015] Disadvantages: a. It is not easy to select a capillary with uniform inner diameter and accurately measure the inner diameter; b. The contact angle between the liquid and the tube wall is not easy to measure; c. The purity of the solution will affect the measurement of surface tension to varying degrees

[0019] Disadvantages: The disadvantage of AFM is that the imaging range is too small, the speed is slow, and it is too much affected by the probe

This detection method is to detect in the air, which is relatively accurate, but when detecting liquid samples, due to the existence of solvent molecules, the detection of the probe will be seriously affected, and the detection accuracy cannot be guaranteed. At the same time, the purpose of this project cannot be achieved, let alone the two measurements linked together

[0020] At present, for the detection methods of micro-nano particles, especially the characteristic mechanical properties parameters of micro-nano particles in the free state in the liquid phase system, they cannot provide reliable, accurate and precise detection results, and many detection methods have no limit for the particle size lower limit. Unable to reach the micro-nano level, it is severely restricted by the external environment, and its applicable range is small

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