Preparation method and using device thereof for asphalt sample for AFM (Atomic Force Microscopy) observation

A technology for asphalt and to be observed, applied in the direction of scanning probe technology, instruments, etc., can solve the problems that cannot truly reflect the phase structure of asphalt, the film thickness and shape are difficult to effectively control, and the application of atomic force microscopy technology is unfavorable, so as to meet the requirements of observation Demand, anti-aging phenomenon, good flatness effect

Inactive Publication Date: 2015-07-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, this method is simple and easy to operate, but the problem is that the surface flatness formed by drop coating is poor, and it is difficult to meet the flatness requirements of the atomic force microscope for the sample surface, and the slide sample needs to be heated again to obtain a smooth surface. s surface
The problem lies in: the glass slide film sample is heated twice, the asphalt sample will age rapidly because of the small film thickness, and the microscopic structure observed by AFM cannot truly re...

Method used

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  • Preparation method and using device thereof for asphalt sample for AFM (Atomic Force Microscopy) observation
  • Preparation method and using device thereof for asphalt sample for AFM (Atomic Force Microscopy) observation
  • Preparation method and using device thereof for asphalt sample for AFM (Atomic Force Microscopy) observation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Put 200g of the 70# base asphalt sample to be observed into a constant temperature oven, set the temperature of the oven at 130°C, and heat until the asphalt completely melts and becomes a flowing liquid;

[0041] (2) Put a clean metal sample dish (inner diameter 10 mm, height 2 mm) into an oven at the same temperature and preheat it for 30 minutes to prevent air bubbles from being generated when the asphalt sample is poured into the mold;

[0042] (3) Take out the metal sample container and place it on the horizontal platform, quickly take out the asphalt sample and stir evenly, take about 0.2g of asphalt with a small spoon, and immediately pour it into the sample container at one time, the height is slightly lower than the sample container edge, such as figure 1 and figure 2 As shown, cover the corresponding cap to prevent contamination of the sample surface;

[0043] (4) Cool the sample dish at room temperature for at least 24 hours to ensure that the annealin...

Embodiment 2

[0047] (1) Put the SBS modified asphalt sample to be observed into a constant temperature oven, set the temperature of the oven at 150°C, and heat the asphalt to a flowing liquid state;

[0048] (2) Put a clean metal sample dish (inner diameter 10 mm, height 2 mm) into an oven at the same temperature and preheat it for 30 minutes to prevent air bubbles from being generated when the asphalt sample is poured into the mold;

[0049] (3) Take out the metal sample container and put it on the horizontal platform, quickly take out the asphalt sample and stir evenly, take about 0.2g of asphalt with a small spoon and inject it into the sample container at one time, the height is slightly lower than the edge of the sample container , cover the corresponding cap to prevent contamination of the sample surface;

[0050] (4) Cool the sample dish at room temperature for at least 24 hours to ensure that the annealing process is completed and the microscopic morphology of the asphalt returns t...

Embodiment 3

[0054] A kind of sample holding dish that the method described in embodiment 1 and 2 is used, as figure 1 and figure 2 as shown, figure 1 It is a structural schematic diagram of a dish body in a sample holding dish according to an embodiment of the present invention; figure 2 It is a schematic structural view of the cap in the sample container of the embodiment of the present invention; it includes a dish body 1 and a matching cap 2 with the dish body 1, and the cap 2 is covered on the dish body 1, wherein: the dish body 1 and the cap 2 are both Made of metal, the metal is stainless steel 304; the shape of the dish body 1 is a cylinder shape, including the bottom surface and the side; the shape of the cap 2 is a cylinder shape, including the upper bottom surface, the side surface and the upper center of the upper bottom surface. The cap handle 3; the diameter of the bottom surface of the dish body 1 is 10mm, and the height of the side is 2mm.

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Abstract

The invention discloses a preparation method for an asphalt sample for AFM (Atomic Force Microscopy) observation. The preparation method comprises the following steps of putting asphalt samples to be observed into a constant temperature oven and heating the asphalt samples to be observed to be melted; putting a clean sample holding vessel into an oven in the same temperature, taking out and putting the sample holding vessel on a horizontal table top, rapidly taking out the asphalt samples to be observed and evenly stirring, fetching appropriate asphalt samples to be observed to be injected into the sample holding vessel in one time, enabling the height of the asphalt samples to be slightly lower than the edge of the sample holding vessel, covering a cover and observing the sample holding vessel after the room temperature is cooled. The invention also discloses the sample holding vessel for the above method. The sample holding vessel comprises a vessel body (1) and a cover (2) which is matched with the vessel body (1); the cover (2) covers the vessel body (1). The preparation method is simple in operation and easy to operate, the asphalt samples form into smooth surfaces due to natural flow forming, shapes and thickness of the asphalt samples are effectively controlled through the size of the sample holding vessel, and AFM observation requirements for the flatness and the thickness of the samples are satisfied.

Description

technical field [0001] The invention belongs to the technical field of asphalt nanoscale microstructure and morphology research, and relates to a method for preparing an asphalt sample for atomic force microscope observation and a device used therefor. Background technique [0002] Microstructural analysis is an effective analytical technique for studying asphalt aging mechanism, macroscopic rheological properties, and road performance. From ordinary optical microscopy, electron microscopy to atomic microscopy, the application in asphalt research has also been There have been many preliminary investigations. Among them, fluorescence microscopy (FM), scanning electron microscopy (SEM), and atomic force microscopy (AFM) are commonly used. Fluorescence microscopy is mainly used to study polymer-modified asphalt, and the base asphalt cannot reflect enough fluorescence to be applied; scanning electron microscopy requires a high-vacuum operating environment, and the sample needs ...

Claims

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Application Information

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IPC IPC(8): G01Q30/20
Inventor 刘黎萍王明孙立军
Owner TONGJI UNIV
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