CN107063829B - Dumbbell-shaped sample preparation mold and sample polymerization method - Google Patents
Dumbbell-shaped sample preparation mold and sample polymerization method Download PDFInfo
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- CN107063829B CN107063829B CN201710373601.0A CN201710373601A CN107063829B CN 107063829 B CN107063829 B CN 107063829B CN 201710373601 A CN201710373601 A CN 201710373601A CN 107063829 B CN107063829 B CN 107063829B
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- interlayer
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- sample preparation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
Abstract
The invention discloses a dumbbell-shaped sample preparation mould and a sample preparation method, wherein the dumbbell-shaped sample preparation mould comprises a base, N interlayer and a top cover; the first cavity of the base and the second cavities in the N interlayer are used for containing polymer solution; the inner wall of the base and the inner wall of each interlayer are in a step shape, so that the middle interlayer is fully embedded on the base, and the (i+1) th interlayer can be embedded on the (i) th interlayer, thereby realizing the sealing of the first cavity of the base and the second cavity of the interlayer. In addition, solution holes are formed in the interlayer, so that the polymer solution added by the upper interlayer can flow into the interlayers below. The invention has good sealing performance, simple polymerization operation, and the number of the intermediate layers can be set according to the actual demands of the user, a plurality of samples can be polymerized at one time, and the invention is convenient and quick, and has better popularization and wide applicability.
Description
Technical Field
The invention relates to the technical field of sample preparation dies, in particular to a dumbbell-shaped sample preparation die and a sample polymerization method.
Background
In order to understand the properties of the material in depth, some basic mechanical properties of the material need to be measured through a tensile test, for example, the elastic limit, the elongation, the elastic modulus, the proportional limit, the area reduction, the tensile strength, the yield point, the yield strength and other tensile property indexes of the material can be determined through the tensile test. Because the two ends of the test piece are loading ends, the stress is complex, and the design stress state of the test piece is not realized, if the whole test piece is made into a uniform diameter, the two loading ends are generally deformed or destroyed greatly, and the real test purpose cannot be achieved. Therefore, the two ends are thickened to avoid excessive deformation or damage, and the large deformation and damage are controlled in the effective test piece section with uniform and slender middle. Therefore, a standard sample must be used in the tensile test, and the sample bar is usually selected to be dumbbell-shaped. Currently, there are two main ways to prepare dumbbell-shaped splines, namely, using a professional dumbbell-shaped spline sampling machine or using a common dumbbell-shaped spline cutter and die.
However, when applied to polymeric materials, these two preparation methods have the following problems:
(1) The special dumbbell-shaped sample preparation machine is convenient to operate and high in efficiency, but is high in price and easy to damage tissues; the dumbbell type sample making machine in the market adopts automatic program electric cutting and the like, and the price is generally 2000-10000 yuan; however, in the case of polymeric materials, the gel is not cut until it has solidified completely, and the cutting edges damage the tissue within and destroy the integrity of the material tissue.
(2) In order to improve the polymerization efficiency of materials, most of materials used in polymerization are volatile substances (such as resin and hydrogel), and the polymerization process is carried out in a high-temperature vacuum box, so that the tightness of the mold is poor and the reagents are volatilized in a large amount. The common dumbbell-shaped mold is used, so that the integrity of tissues can be well maintained, but the cover is not subjected to strict sealing treatment, so that the cover is poor in sealing performance, and an upper depression can appear; and can not carry out the polymerization of a plurality of samples at one time, the polymerization efficiency is low.
Disclosure of Invention
The invention provides a dumbbell-shaped sample preparation mold and a sample preparation method aiming at overcoming the defects, and aims to solve the technical problem that the existing mold cannot prepare a plurality of samples simultaneously under the condition of ensuring good tightness. The dumbbell-shaped sample preparation mold provided by the invention is easy to realize in structure, simple and quick in operation in the polymerization process, and capable of rapidly and conveniently acquiring a plurality of standard samples at one time, and has good popularity and wide applicability.
To achieve the above object, the present invention provides a dumbbell sample preparation mold, comprising:
a base, N spacers, which are 1 st spacer, 2 nd spacer, … … and N th spacer;
the base is internally provided with a first cavity, the inner wall of the first cavity is stepped, and the inner wall of the first cavity is in sealing fit with the outer wall of the 1 st interlayer;
each interlayer is provided with a second cavity, the inner wall of the second cavity is stepped, and the inner wall of the second cavity of the ith interlayer is in sealing fit with the outer wall of the second cavity of the (i+1) th interlayer; i is more than or equal to 1 and less than or equal to N-1;
the top cap is equipped with the third cavity, and the inner wall of third cavity and the outer wall sealing fit of the N interlayer.
Preferably, the bottom of the second cavity of each interlayer is provided with a first solution hole and a second solution hole, the first solution hole is positioned at one end of the bottom of the second cavity, and the second solution hole is positioned at the other end of the bottom of the second cavity.
Preferably, an extension plate is provided on each compartment for taking and placing the compartment.
As another aspect of the present invention, the present invention provides a sample preparation method based on a dumbbell-shaped sample preparation mold, comprising the steps of:
when the polymerization solution is placed in the dumbbell-shaped sample preparation mold, the dumbbell-shaped sample preparation mold is subjected to constant-temperature heating treatment, so that a plurality of dumbbell-shaped samples are obtained.
Preferably, each interlayer is provided with a first solution hole and a second solution hole, the first solution hole is positioned at one end of the bottom of the second cavity, the second solution hole is positioned at the other end of the bottom of the second cavity, and polymer solution is injected into the Nth interlayer to realize injection of polymer solution into the dumbbell-shaped sample preparation mold.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. the outer wall of the first interlayer is matched with the inner wall of the base, so that the first cavity is sealed; the inner wall of the ith interlayer is in sealing fit with the outer wall of the (i+1) th interlayer, so that the second cavity of the ith interlayer is sealed; the outer wall of the Nth interlayer is in sealing fit with the inner wall of the top cover, so that the sealing of the Nth interlayer is realized; the first cavity and the second cavity are used for containing polymer solution, so that the sample preparation mold provided by the invention can be used for simultaneously preparing a plurality of dumbbell-shaped samples under the condition of ensuring good tightness.
2. When the dumbbell sample preparation mould is used for preparing a plurality of dumbbell samples, the interlayer is firstly matched with the base in a mounting way, the N-th interlayer is injected with the polymer solution, and the base and each interlayer are filled with the polymer solution through the solution hole on each interlayer, so that the dumbbell sample preparation process is simpler and more convenient.
3. The sample preparation mold is simple in structure, the number of the middle interlayers can be set according to the actual demands of the user, a plurality of samples can be polymerized at one time, the operation is simple, the convenience and the rapidness are realized, and the mold has good popularity and wide applicability.
Drawings
Fig. 1 is a schematic structural view of a base in a dumbbell-shaped sample preparation mold provided by the invention;
FIG. 2 is a schematic structural view of each interlayer in the dumbbell-shaped sample preparation mold provided by the invention, wherein (a) is a structural view of each interlayer from a front view, and (b) is a structural view of each interlayer from a back view;
fig. 3 is a schematic structural view of a top cover in the dumbbell-shaped sample preparation mold provided by the invention;
fig. 4 is a schematic structural diagram of a dumbbell sample preparation mold provided by the invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The dumbbell-shaped sample preparation mold comprises a base 1, N separation layers 2 and a top cover 3, wherein the N separation layers are marked as a 1 st separation layer, a 2 nd separation layer, … … and an N th separation layer.
Fig. 1 is a schematic structural diagram of a base in a dumbbell-shaped sample preparation mold provided by the invention, wherein the base 1 is provided with a first cavity 101, the first cavity 101 is dumbbell-shaped, namely, the middle is narrow and the two ends are wide, the inner wall of the first cavity 101 is stepped, the inner wall of the first cavity 101 is divided into a first base side surface 102, a second base side surface 103 and a base step surface 104, the first cavity 101 contains polymer solution, the outer side wall of a separation layer is in sealing fit with the second base side surface 103, and the outer bottom surface of the separation layer is in sealing fit with the base step surface 104.
Fig. 2 is a schematic diagram of a interlayer structure in a dumbbell-shaped sample preparation mold provided by the invention, wherein fig. 2 (a) is a structural diagram of each interlayer viewed from a front view, and fig. 2 (b) is a structural diagram of each interlayer viewed from a back view. The structures of the 1 st interlayer to the N th interlayer are the same, a second cavity 201 is arranged on the interlayer 2, the second cavity 201 is dumbbell-shaped, and the second cavity 201 is used for containing polymer solution. The inner wall of second cavity 201 is echelonment, and the inner wall of second cavity 201 includes first interlayer side 202, second interlayer side 203 and interlayer step face 204, and the bottom of second cavity 201 is equipped with first solution hole 205 and second solution hole 206, and first solution hole 205 is located the one end of second cavity 201 bottom, and second solution hole 206 is located the other end of second cavity 201 bottom, is provided with on the interlayer and stretches out board 209, conveniently gets and put the interlayer. The outer sidewall 207 of the barrier is in sealing engagement with the second base side 104 of the base or with the second barrier side 204 of the other barrier, and the outer bottom 208 of the barrier is in sealing engagement with the base step 103 of the base or with the barrier step 103 of the barrier.
Fig. 3 is a schematic diagram of a top layer structure in a dumbbell-shaped sample preparation mold provided by the invention, wherein a third cavity is arranged on the top layer, the third cavity is dumbbell-shaped, and the inner wall 301 of the third cavity is in sealing fit with the outer wall of an nth interlayer.
Fig. 4 is a schematic structural view of a dumbbell-shaped sample preparation mold provided by the invention, a base step surface of a base 1 is tightly matched with an outer bottom surface of a 1 st interlayer, a second base side surface of the base 1 is tightly matched with an outer side wall of the 1 st interlayer, a first cavity is sealed, an interlayer step surface of the 1 st interlayer is tightly matched with an outer bottom surface of a 2 nd interlayer, a second interlayer side surface of the 1 st interlayer is tightly matched with an outer side wall of the 2 nd interlayer, an interlayer step surface of the 2 nd interlayer is tightly matched with an outer bottom surface of a 3 rd interlayer, a second interlayer side surface of the 2 nd interlayer is tightly matched with an outer side wall of the 3 rd interlayer, the 2 nd interlayer is tightly sealed, the interlayers are sequentially installed until the N-1 th interlayer second cavity is tightly sealed, and the outer wall of the N-th interlayer second cavity is tightly matched with the outer wall of a third cavity of a top cover to realize the sealing of the N-th interlayer second cavity.
The inner wall of the base and the inner wall of the interlayer are in a step shape, so that the 1 st interlayer is fully embedded on the base, the same edge treatment is adopted among the interlayers, the (i+1) th interlayer can be embedded on the (i) th interlayer, and the die is well sealed. Through first hole and the second hole in the interlayer, realize flowing into each layer below from the polymerization liquid that upper portion interlayer added, all splendid attire polymerization liquid in the first cavity of base and every interlayer second cavity, make the process of preparing dumbbell-shaped sample simpler and more convenient. The number of each interlayer can be set according to the own requirement, and a plurality of samples can be polymerized at one time, so that the method is convenient and quick.
The sample preparation method based on the dumbbell-shaped sample preparation mold provided by the invention comprises the following specific operation steps:
step one, cleaning a base, N middle interlayers and a top cover, and drying;
step two, placing the base on an experiment table, and embedding an interlayer on the base through the matching of the stepped inner wall according to the assembly sequence; similarly, other interlayer are embedded and matched layer by layer through the stepped inner wall, and the number of the middle interlayer can be single or multiple according to the requirement;
injecting pre-prepared hydrogel solution into the uppermost interlayer, enabling the solution to flow into dumbbell-shaped grooves of each interlayer at the lower part layer by layer through solution holes at two ends of the interlayer, dropwise adding until the solution level of the second cavity of the Nth interlayer reaches the first step surface of the second cavity of the Nth interlayer, and then covering a top cover to seal the die.
And fourthly, placing the dumbbell-shaped sample preparation mould added with the hydrogel solution in an oven, setting the temperature to 40 ℃ for 10 hours, taking out, pressing the base, uncovering the top cover, taking out each interlayer through the extending plates at the two sides of the interlayer, and pouring out the polymerized dumbbell-shaped sample.
The technical problems, technical solutions and advantageous effects of the present invention have been further described in detail in the above embodiments, and it should be understood that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (5)
1. A dumbbell sample preparation mold, comprising:
the base (1), N interlayer (2) and a top cover (3), wherein the N interlayer (2) is marked as a 1 st interlayer, a 2 nd interlayer, a … … and an N th interlayer;
a first cavity is arranged in the base (1), the inner wall of the first cavity is stepped, and the inner wall of the first cavity is in sealing fit with the outer wall of the 1 st interlayer;
each interlayer is provided with a second cavity, the inner wall of the second cavity is in a ladder shape, and the inner wall of the ith interlayer second cavity is in sealing fit with the outer wall of the (i+1) th interlayer second cavity; i is more than or equal to 1 and less than or equal to N-1;
the top cover (3) is provided with a third cavity, and the inner wall of the third cavity is in sealing fit with the outer wall of the N interlayer.
2. The dumbbell sample preparation mold of claim 1, wherein the second cavity bottom of each of the compartments is provided with a first solution hole and a second solution hole, the first solution hole being located at one end of the second cavity bottom, and the second solution hole being located at the other end of the second cavity bottom.
3. The dumbbell sample preparation mold of claim 1 or 2, wherein each of the compartments is provided with a protruding plate for taking and placing the compartments.
4. A sample preparation method based on the dumbbell sample preparation mold of claim 1, characterized by comprising the steps of:
and when the dumbbell-shaped sample preparation mold is filled with the polymerization solution, performing constant-temperature heating treatment on the dumbbell-shaped sample preparation mold to obtain a plurality of dumbbell-shaped samples.
5. The sample preparation method of claim 4, wherein each of the spacers is provided with a first solution hole and a second solution hole, the first solution hole is positioned at one end of the bottom of the second cavity, the second solution hole is positioned at the other end of the bottom of the second cavity, and the injection of the polymer solution into the nth spacer realizes the injection of the polymer solution into the dumbbell-shaped sample preparation mold.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710373601.0A CN107063829B (en) | 2017-05-24 | 2017-05-24 | Dumbbell-shaped sample preparation mold and sample polymerization method |
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| CN201710373601.0A CN107063829B (en) | 2017-05-24 | 2017-05-24 | Dumbbell-shaped sample preparation mold and sample polymerization method |
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| CN107063829A CN107063829A (en) | 2017-08-18 |
| CN107063829B true CN107063829B (en) | 2023-07-25 |
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| CN109580311B (en) * | 2018-12-29 | 2021-10-12 | 苏州恒信建设技术开发检测有限公司 | Sampling machine and using method thereof |
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