Young-Laplace pressure measurement and demonstration device
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A demonstration device and pressure testing technology, applied in the direction of surface tension analysis, etc., can solve problems such as inconsistency, achieve the effect of simple operation, solving the problem of precision error, and high promotion value
Pending Publication Date: 2020-08-04
上海梭伦信息科技有限公司
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In the test, the technology of the micro-pressure sensor was also not used, which is inconsistent with the technology described in this patent
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[0052] In order to easily understand the technical means, creative features, goals and effects of the present invention, the present invention will be further described below in conjunction with specific illustrations.
[0053] Such as Figure 1-6 As shown, it includes a background light 1, a pressure test mechanism 2, a microinjector 3, a liquid inlet control translation stage 4, a Z-axis translation stage 5, a needle 6, a sample stage 7, a microscope lens 8 and a digital camera 9, and the microinjection 3 passes through the fixture It is fixed on the liquid inlet control translation platform 4, and is fixed with the Z-axis translation platform 5 by fixing screws. The needle 6 is fixed on the pressure test mechanism 2 through the Luer quick connection structure, and the pressure test mechanism 2 is fixed on the liquid inlet control by fixing screws. On the translation stage 4, the background light 1, the microscopic lens 8 and the digital video camera 9 are respectively arran...
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Abstract
The invention discloses a Young-Laplace pressure measurement and demonstration device, and belongs to the technical field of interface chemical analysis and measurement. The device comprises a background lamp, a pressure testing mechanism, a microinjector, a liquid inlet control translation table, a Z-axis translation table, a needle head, a sample table, a microscope lens and a digital camera. According to the device, a brand-new connection relationship is provided, the high precision of a micro-pressure sensor is fully utilized, and meanwhile, by combining imaging systems a microscope and the camera, the pressure principle and the equation of the Young-Laplace equation are completely demonstrated, so that the device follows the principle of the equation better, the measurement precisionis higher, the operation is simpler, the precision error problem caused by elimination or transformation of various original test methods is solved, and the dual purposes of demonstration and measurement are achieved. The technology provided by the invention can be widely applied to the fields of daily use chemicals, pesticides, petrochemical engineering, surfactant research, fire protection, electric power and the like, and has extremely high popularization value.
Description
technical field [0001] The invention relates to a Young-Laplace pressure measurement and demonstration device, which belongs to the technical field of interface chemical analysis and measurement. Background technique [0002] In 1805, Young and Laplace jointly proposed the basic Young-Laplace equation, which provided the possibility for the quantitative analysis of interface chemistry. The original formula of the Young-Laplace equation is as follows: [0003] ΔP=σ×(1 / R 1 +1 / R 2 )=σ×(2 / R 0 ) [0004] Where ΔP is the pressure difference inside and outside the droplet, σ is the surface tension or interfacial tension, in mN / m or dyne / cm, R 1 and R 2 is the radius of curvature of the contact position, and R0 is the radius of curvature of the apex of the droplet. [0005] When considering the influence of gravity, the equation transformation of Young-Laplace equation is as follows: [0006] ΔP=σ×(2 / R 0 )±Δρgz [0007] Among them, Δρ is the density difference between the ...
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