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Device and method for testing layered dynamic adsorption and interface rheology of molecular film

A technology of dynamic adsorption and testing equipment, which is applied in the direction of surface tension analysis, etc., can solve the problems that the surface tension testing technology cannot be obtained, and achieve the improvement of analysis accuracy and the reliability of measured values, wide application fields and high promotion value. Effect

Pending Publication Date: 2020-08-11
上海梭伦信息科技有限公司
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Problems solved by technology

[0017] The above research results can not be obtained through traditional surface tension testing technology

Method used

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  • Device and method for testing layered dynamic adsorption and interface rheology of molecular film
  • Device and method for testing layered dynamic adsorption and interface rheology of molecular film
  • Device and method for testing layered dynamic adsorption and interface rheology of molecular film

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Embodiment Construction

[0049] 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.

[0050] Such as Figure 1-10 As shown, a molecular film layered dynamic adsorption and interfacial rheological testing device, including a first quartz glass square sample vessel 1, a U-shaped needle 2, a platinum plate 3, a second quartz glass square sample vessel 7, and a background light 8 , soft light plate 9, analytical balance 10, piezoelectric ceramic nano-platform 11, level adjustment sample stage 12, electric control sample lifting platform 13, microscope lens 14, video camera 15, pressure sensor 16, piezoelectric ceramic nano-platform 11, level adjustment sample Platform 12 and electric control sample lifting platform 13 are fixed by fixing screws from top to bottom to form a sample platform and a lifting control system. The first quartz glass square ...

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Abstract

The invention discloses a device and a method for testing layered dynamic adsorption and interface rheology of a molecular film, and belongs to the technical field of interface chemical analysis and testing. The method comprises: hanging a platinum plate below the analytical balance, and testing the meniscus contact angle of the corrected thin plate and the surface tension after buoyancy when theupper edge of the platinum plate is in contact with the liquid; immersing a U-shaped needle head into the tested liquid; testing the dynamic surface tension during hanging drop, to complete the dynamic adsorption test of the molecular films of different layers, and dynamically analyzing a change curve of a surface tension value along with time and a surface area; analyzing to obtain the dynamic adsorption of the corresponding molecular film and the modulus of the corresponding interface elastic coefficient. The method is particularly suitable for layered dynamic adsorption analysis of molecular films of surfactants and colloidal solutions and determination of interface rheological properties, greatly improves the analysis precision and the credibility of measured values, is wide in application industry field, and has extremely high popularization value.

Description

technical field [0001] The invention relates to a molecular film layered dynamic adsorption and interface rheology testing device and method, belonging to the technical field of interface chemical analysis and testing. Background technique [0002] The platinum plate method (Wilhelmy plate method) was proposed by L.Wilhelmy1863 as a classic method (about the dependence of the alcohol capillary constant on the substance and shape of the wetted solid Ueber die Abhangigkeitder Capillaritats-Constanten des Alkohols von Substanz und Gestalt desbenetzlen festen Korpers, Von. Ludwig Wilhelmy, Ann. Phys., 119, 177 (1863)). This method together with the platinum ring method (DuNouy ring) constitutes a classic method of weighing principle to test liquid-gas surface tension or liquid-liquid interfacial tension. By replacing the platinum plate with a solid sample of known wetting perimeter, the contact angle value between the solid-liquid-gas three-phase can be tested when the surface ...

Claims

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Application Information

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IPC IPC(8): G01N13/02
CPCG01N13/02
Inventor 施建辉
Owner 上海梭伦信息科技有限公司
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