CN110850115A - Preparation device and method suitable for atomic force microscope thermal regeneration asphalt sample - Google Patents
Preparation device and method suitable for atomic force microscope thermal regeneration asphalt sample Download PDFInfo
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- CN110850115A CN110850115A CN201910993815.7A CN201910993815A CN110850115A CN 110850115 A CN110850115 A CN 110850115A CN 201910993815 A CN201910993815 A CN 201910993815A CN 110850115 A CN110850115 A CN 110850115A
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- asphalt
- sample
- atomic force
- force microscope
- quartz glass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01Q—SCANNING-PROBE TECHNIQUES OR APPARATUS; APPLICATIONS OF SCANNING-PROBE TECHNIQUES, e.g. SCANNING PROBE MICROSCOPY [SPM]
- G01Q30/00—Auxiliary means serving to assist or improve the scanning probe techniques or apparatus, e.g. display or data processing devices
- G01Q30/20—Sample handling devices or methods
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a sample preparation device and a method suitable for observing regenerated asphalt by an atomic force microscope, wherein the device comprises the following components: high-temperature-resistant quartz glass sheets with grooves, glass slides and 3M double-sided adhesive tapes. The slide served as the substrate and 3M double-sided tape was used to hold the quartz glass to the slide, and the sample was stored in a notch on the quartz glass. Adopt this device to make pitch can control all sample membrane thickness unanimously, guarantee that the sample surface is level and smooth, eliminate the influence of membrane thickness to sample surface microstructure to the sample, guarantee simultaneously that being heated of sample and heat dissipation are even. The experimental device adopted by the invention is more suitable for experimental requirements, can more accurately control the influence of temperature on asphalt, and is convenient to manufacture and easy to operate.
Description
Technical Field
The invention relates to the technical field of atomic force microscope sample preparation, in particular to a preparation device and a preparation method suitable for observing a regenerated asphalt sample by an atomic force microscope.
Background
The macroscopic properties of asphalt as a precious non-renewable energy source have been intensively studied, but the microscopic action mechanism of asphalt is still not fully explained due to the application of scientific technology. An atomic force microscope has been widely used in various research fields as an instrument capable of detecting the nano-scale morphology and mechanical properties of a sample surface, and researchers are trying to observe the microstructure of asphalt by using the atomic force microscope and detect the microstructure and the micromechanical properties of asphalt by the acting force between a probe and the sample, so as to research the microscopic action mechanism of asphalt and establish the relationship between the microscopic properties and the macroscopic properties.
The preparation of the sample is an important step before the asphalt experiment is carried out through an atomic force microscope, the quality of the sample preparation determines the reliability and the accuracy of a detection result, and the existing methods for preparing the asphalt sample through the atomic force microscope mainly comprise a solution spraying method and a heating liquid drop method. The solution spraying method utilizes a solvent to dissolve asphalt, on one hand, the crude oil microstructure of the asphalt can be damaged, on the other hand, the used solvent has strong toxicity, and the preparation process is complex and tedious. The heated droplet method cannot control the film thickness of the sample, further reducing the repeatability of the experiment. Meanwhile, the preparation devices of the two methods are difficult to eliminate the base effect generated by the over-thin prepared asphalt film, so that the accuracy of the experimental result is influenced.
Disclosure of Invention
The invention aims to overcome the problems and provides a device and a method for preparing a hot-mix recycled asphalt sample suitable for an atomic force microscope.
In order to achieve the purpose, the invention provides the following scheme:
a preparation device suitable for an atomic force microscope hot-mix recycled asphalt sample comprises a substrate, a sample storage device and a 3M double faced adhesive tape; the substrate is arranged below the sample storage device, and the sample storage device is fixed on the substrate through a 3M double-sided adhesive tape.
Optionally, the substrate is a cuboid glass slide with the thickness of 25.4mm multiplied by 75.6mm and the thickness of 1-1.2 mm;
the sample storage device is 4mm thick, and the length of side 25mm, positive center notch depth 2.5mm, diameter 10mm, and the notch bottom is the fillet that the radius is 0.5mm, the sample storage device material is quartz glass.
The invention also discloses a preparation method of the hot-mix recycled asphalt sample suitable for the atomic force microscope, which is applied to the sample preparation device and comprises the following steps:
step 1: preparing the regenerated asphalt by combining a method combining self-weight fusion and mechanical stirring, and controlling the temperature of the regenerated asphalt at 100-180 ℃ to enable the regenerated asphalt to be in a liquid state;
step 2: dripping the asphalt in a flowing state into a quartz glass notch, and uniformly enabling the temperature in the oven to reach 100 ℃;
and step 3: putting the quartz glass with the regenerated asphalt in an oven, and covering the oven with a glass ware to prevent airflow and dust in the oven from polluting the asphalt surface and ensure that the asphalt surface is smooth and free from pollution;
and 4, step 4: taking out the quartz glass, and placing the quartz glass at the temperature of 25 ℃ for annealing at room temperature for 24 hours to obtain a final atomic force microscope asphalt sample;
and 5: the obtained atomic force microscope samples were fixed on a glass slide by 3M double-sided adhesive tape in preparation for experiments using an atomic force microscope.
Preferably, the fusion process of the reclaimed asphalt is to spread the aged asphalt on the fresh asphalt and fully mix the reclaimed asphalt by combining self-weight fusion and mechanical stirring.
Preferably, when the reclaimed asphalt in a flowing state is transferred to a sample storage device, the reclaimed asphalt in a flowing state is flush with the sample storage device in height.
Preferably, in step 3, the quartz glass containing the reclaimed asphalt is placed in an oven and kept at the temperature for more than 30 min.
Has the advantages that:
the asphalt sample is prepared by adopting the substrate and the sample storage device, and the thickness of all samples can be controlled to be the same by the sample storage device, so that experimental errors caused by the difference of the thickness of the films are eliminated, the substrate effect caused by the over-thin sample is avoided, the heat dissipation and heating on the periphery of the asphalt are uniform, the property change of the asphalt caused by the uneven heat dissipation and heating is never avoided, and the reliability of the test result is improved. Meanwhile, the sample storage device has the same side height, so that the sample can be ensured to be flat, and the influence on the surface of the sample caused by the unevenness of the sample is reduced. The sample preparation device is simple in structure and improves the repeatability of the atomic force microscope for detecting the asphalt sample.
Drawings
FIG. 1 is a top view of an asphalt store according to the present invention;
FIG. 2 is a side view of an asphalt store according to the present invention.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific examples, which are carried out on the premise of the technical solution of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The preparation device for the hot-mix reclaimed asphalt sample of the atomic force microscope as shown in the figures 1 and 2 comprises a glass slide substrate and a sample storage device; the substrate is arranged below the sample storage device, and the sample storage device is arranged on the substrate and bonded through 3M ultrathin double-faced adhesive.
The sample storage device comprises a quartz glass sheet, and a notch is formed in the center of the quartz glass sheet. The quartz glass sheet is of a cube structure with the depth of 4mm and the side length of 25mm, a notch in the center of the glass sheet is 2.5mm deep and 10mm in diameter, and a fillet with the radius of 0.5mm is arranged at the bottom of the notch; the substrate is a cuboid with the thickness of 1-1.2mm and the thickness of 25.4mm multiplied by 75.6 mm.
The embodiment also discloses a method for preparing a hot-mix recycled asphalt sample based on the preparation device, which comprises the following steps:
step 1: the aged asphalt and the new asphalt are subjected to self-weight heating fusion and mechanical stirring to obtain the flowing regenerated asphalt;
step 2: dropping the flowing asphalt into a quartz glass notch, wherein the height of the flowing regenerated asphalt is flush with that of the sample storage device, and the temperature in the oven is uniformly up to 100 ℃;
and step 3: putting the quartz glass with the regenerated asphalt in an oven, covering the oven with a glass ware, preventing airflow and dust in the oven from polluting the asphalt surface, ensuring that the asphalt surface is smooth and free from pollution, and keeping the temperature for more than 30 min;
and 4, step 4: and taking out the quartz glass, and annealing at room temperature of about 25 ℃ for 24 hours to obtain the final atomic force microscope asphalt sample.
And 5: and fixing the obtained sample of the atomic force microscope on a glass slide through 3M double faced adhesive tape, and carrying out an experiment by using the atomic force microscope.
The technical means disclosed by the scheme of the invention are not limited to the technical means disclosed by the technical means, and the technical scheme also comprises the technical scheme formed by any combination of the technical characteristics. While the foregoing is directed to embodiments of the present invention, it will be appreciated by those skilled in the art that various changes may be made in the embodiments without departing from the principles of the invention, and that such changes and modifications are intended to be included within the scope of the invention.
Claims (7)
1. The utility model provides a preparation facilities suitable for atomic force microscope hot mix regeneration asphalt sample which characterized in that: comprises a glass slide substrate and a sample storage device; the substrate is arranged below the sample storage device, and the sample storage device is arranged on the substrate and bonded through 3M ultrathin double-faced adhesive.
2. The device for preparing the hot-mix recycled asphalt sample for the atomic force microscope as claimed in claim 1, wherein the device comprises: the sample storage device comprises a quartz glass sheet, and a notch is formed in the center of the quartz glass sheet.
3. The device for preparing the hot-mix recycled asphalt sample for the atomic force microscope as claimed in claim 2, wherein: the quartz glass sheet is of a cube structure with the depth of 4mm and the side length of 25mm, a notch in the center of the glass sheet is 2.5mm deep and 10mm in diameter, and a fillet with the radius of 0.5mm is arranged at the bottom of the notch; the substrate is a cuboid with the thickness of 1-1.2mm and the thickness of 25.4mm multiplied by 75.6 mm.
4. The preparation method of the hot-mixed recycled asphalt sample suitable for the atomic force microscope is characterized by comprising the following steps of:
step 1: preparing the regenerated asphalt by combining a method combining self-weight fusion and mechanical stirring, and controlling the temperature of the regenerated asphalt at 100-180 ℃ to enable the regenerated asphalt to be in a liquid state;
step 2: dripping the asphalt in a flowing state into a quartz glass notch, and uniformly enabling the temperature in the oven to reach 100 ℃;
and step 3: putting the quartz glass with the regenerated asphalt in an oven, and covering the oven with a glass ware to prevent airflow and dust in the oven from polluting the asphalt surface and ensure that the asphalt surface is smooth and free from pollution;
and 4, step 4: taking out the quartz glass, and placing the quartz glass at the temperature of 25 ℃ for annealing at room temperature for 24 hours to obtain a final atomic force microscope asphalt sample;
and 5: the obtained atomic force microscope samples were fixed on a glass slide by 3M double-sided adhesive tape in preparation for experiments using an atomic force microscope.
5. The method for preparing the hot-mix recycled asphalt sample suitable for the atomic force microscope as claimed in claim 4, wherein the method comprises the following steps: the fusion process of the regenerated asphalt is to spread the aged asphalt on the new asphalt and combine self-weight fusion and mechanical stirring to fully mix the regenerated asphalt.
6. The method for preparing the hot-mix recycled asphalt sample suitable for the atomic force microscope as claimed in claim 4, wherein the method comprises the following steps: when the reclaimed asphalt in the flowing state is transferred to a sample storage device, the reclaimed asphalt in the flowing state is flush with the height of the sample storage device.
7. The method for preparing the hot-mix recycled asphalt sample suitable for the atomic force microscope as claimed in claim 4, wherein the method comprises the following steps: in step 3, the quartz glass with the regenerated asphalt is placed in an oven and kept at the temperature for more than 30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910993815.7A CN110850115A (en) | 2019-10-18 | 2019-10-18 | Preparation device and method suitable for atomic force microscope thermal regeneration asphalt sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910993815.7A CN110850115A (en) | 2019-10-18 | 2019-10-18 | Preparation device and method suitable for atomic force microscope thermal regeneration asphalt sample |
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| Publication Number | Publication Date |
|---|---|
| CN110850115A true CN110850115A (en) | 2020-02-28 |
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| CN201910993815.7A Pending CN110850115A (en) | 2019-10-18 | 2019-10-18 | Preparation device and method suitable for atomic force microscope thermal regeneration asphalt sample |
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2019
- 2019-10-18 CN CN201910993815.7A patent/CN110850115A/en active Pending
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Application publication date: 20200228 |