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Sensor and method for testing wettability change of solid-liquid interface

A solid-liquid interface and sensor technology, applied to instruments, measuring devices, scientific instruments, etc., to achieve the effect of simple components, easy to carry, and broad application prospects

Pending Publication Date: 2021-11-05
青岛市资源化学与新材料研究中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no suitable means in this field to predict the dynamic change of the surface wetting state during the operation of the material

Method used

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  • Sensor and method for testing wettability change of solid-liquid interface
  • Sensor and method for testing wettability change of solid-liquid interface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] First, the solid friction layer was prepared: the micro-nano composite anodized aluminum oxide (3DAAO) was prepared by electrochemical oxidation method, and then the temperature-responsive amphiphilic polycaprolactone was modified on the surface of 3D AAO by solution impregnation method to obtain the solid friction layer. For PCL-3D AAO. Polycaprolactone is a temperature-responsive polymer. The purpose of this is to change the wettability of the solid friction layer from a super-hydrophobic rolling state to a super-hydrophobic adhesion state through external temperature stimulation, and then verify the interface wettability and friction. close relationship with electrical output.

[0043] Assemble the sensor: encapsulate the prepared solid friction layer on both ends of the hollow PET tube, then inject water into the hollow PET tube, bond the copper tape on the back of the solid friction layer, and then lead out the copper wire on the back of the copper tape to obtain ...

Embodiment 2

[0047] Firstly, the aluminum oxide nano template is prepared: the degreased aluminum sheet is electrochemically polished, and the polishing solution is a mixture of ethanol and perchloric acid. Then oxidize in oxalic acid solution, and control the depth of nanoholes by controlling the oxidation time;

[0048] Preparation of alumina micro-template: the degreased aluminum sheet is directly etched in a 10g / L sodium chloride solution without polishing, and the sample is cleaned for use;

[0049] Preparation of alumina micro-nano composite template: the micron template etched with sodium chloride is directly anodized in oxalic acid solution, and then the micro-nano composite structure is obtained.

[0050] After preparing the template above, use the template embossing method to modify different structures on the surface of the polypropylene film. The specific method is: put the template and the polypropylene film between two pieces of tempered glass, and melt the polypropylene film...

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Abstract

The invention relates to the technical field of interface wettability testing, and provides a sensor and a method for testing wettability change of a solid-liquid interface. The sensor provided by the invention comprises a solid-liquid friction nanometer generator and an electric output testing device. The inventor discovers that the interface wettability plays a decisive role in separation and accumulation of solid-liquid friction charges, and on the basis of the discovery, the conversion of the interface wettability is monitored by utilizing a friction electric signal, so that the sensor disclosed by the invention is provided. According to the invention, the change of the wettability of the solid-liquid interface is creatively combined with the change of the solid-liquid friction electric signal, and the solid and the liquid are periodically contacted and separated under the driving of a linear motor, so that the change of the wettability of the interface is reflected by the change of the friction electric signal. The sensor provided by the invention can predict the dynamic change of the surface wettability in the material use process, and has a wide application prospect in the fields of oil-water separation, lubrication and self-cleaning.

Description

technical field [0001] The invention relates to the technical field of interface wettability testing, in particular to a sensor and method for testing wettability changes of a solid-liquid interface. Background technique [0002] Wettability is one of the important characteristics of the material surface. It has a high status in the fields of lubrication, self-cleaning, oil-water separation, anti-icing and even aerospace. Therefore, it is necessary to monitor the transition of the interface wetting state . [0003] At present, there are many characterization methods for interfacial wettability, such as static contact angle, advancing angle, receding angle, rolling angle, surface adhesion and other tests. However, these traditional wettability monitoring methods are relatively static, and the actual application process of materials is relatively complicated, so the traditional methods cannot objectively evaluate the change of interface wettability during operation. Compared...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00H02N1/04
CPCG01N13/00H02N1/04
Inventor 王道爱李小娟张立强周峰
Owner 青岛市资源化学与新材料研究中心
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