CN217586910U

CN217586910U - Laboratory is with simple and easy static light macromolecular compound molecular weight testing arrangement

Info

Publication number: CN217586910U
Application number: CN202123396502.5U
Authority: CN
Inventors: 郑祥斌; 徐同硕; 陈红余; 李平; 苏燕; 刘风霞
Original assignee: Shandong First Medical University and Shandong Academy of Medical Sciences
Current assignee: Shandong First Medical University and Shandong Academy of Medical Sciences
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-10-14
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a laboratory is with simple and easy static light macromolecular compound molecular weight testing arrangement, the sample cell is that the outer wall even has the double flute sample cell that bilateral symmetry convex mirror constitutes, when measuring, hits the blank cistern in the middle of the sample cell with laser earlier and gathers blank scattering data, then rotates the sample cell to the light path center through bottom knob rotation 180 and measures sample scattering data. The utility model discloses the test of background and the sample scattered light intensity that awaits measuring can be realized simply fast to the invention, improves the precision of static light scattering method survey macromolecular compound molecular weight.

Description

Laboratory is with simple and easy static light macromolecular compound molecular weight testing arrangement

Technical Field

The utility model relates to a laboratory test device field.

Background

In the laboratory, the molecular weight of the newly synthesized soluble polymer resin needs to be characterized by the existing methods, such as gel chromatography, viscosity method, end group analysis, osmotic pressure method, and the like. Typically, the fastest convenient test method is to use static light scattering.

There are many instruments for measuring molecular weight of high molecular compounds in laboratories using the principle of static light scattering. For example, some scientific researchers aim at the problems of long analysis period, poor repeatability and low sensitivity of the traditional scatterometer by adding a precise adjustment mechanism and a CCD camera to achieve the purpose of rapidly analyzing and calculating structural parameters, so as to research the polymer polymerization form and structure and determine the crystallization form (CN 2162652Y); in order to solve the problem of complicated molecular range sequence measurement by using multi-beam technology, some researchers have designed and improved a flow sample cell with a cylindrical lens on its side surface to make the detection optical axis perpendicular to the laser beam, so as to facilitate the measurement of molecular weight (CN 202281738U).

The novel design of the device improves the practicability of the measuring device and effectively solves the problems in the corresponding field; however, in order to measure the molecular weight of a high molecular compound, it is necessary to consider the influence of scattering of a solvent itself and the density difference with a solute on experimental results, and there is no ideal high molecular compound molecular weight measuring apparatus which is simple and practical in consideration of the influence of the solvent in the market at present. Then the utility model discloses a laboratory is with simple and easy static light macromolecular compound molecular weight testing arrangement has solved the problem of laboratory accurate measurement macromolecular weight, can get rid of the influence of solvent in the macromolecular compound solution to the accurate molecular weight who measures macromolecular compound.

Disclosure of Invention

To the problem that appears above, the utility model discloses a laboratory is with simple and easy static light macromolecular compound molecular weight testing arrangement.

The utility model provides a following technical method.

A simple static photometric high molecular weight measurement device for a laboratory is characterized by comprising a sample cell (1), a sample table (2) and a fixed support (6), wherein the sample cell (1) is positioned in a central clamping groove of the sample table; the sample platform is connected with an external fixed support through a bearing, and 180-degree rotation and positioning of the sample pool can be realized through rotation of a bottom knob (10).

The sample pool (1) is a double-groove sample pool which is composed of sample grooves which are symmetrical left and right and the outer wall of which is connected with a convex mirror (6) which is symmetrical left and right, a solvent is placed in a blank liquid groove (3), and a solution to be detected is placed in a sample groove (4); the length-width-height ratio of the sample pool is 8 to 10: 8 to 10; the left and right symmetrical convex lenses are tightly attached to the outer wall of the double-groove sample cell, and the radian is 30-80 degrees; the lens can collect the static light generated on the sample cell and focus the static light on the detector, so that the measurement purpose is achieved. The bottom surface of the sample cell is matched with a groove (13) in the center of the sample table so as to be fixed in the groove, and the rotation of the sample cell can be realized through the rotation of the sample table.

The sample table (2) is a circular object table with a groove (13) in the center, and the groove is rectangular and matched with the bottom of the sample cell; the depth of the groove is smaller than the distance between the lower edge of the bilateral symmetry convex mirror of the sample cell and the sample cell; positioning magnets (8) are symmetrically arranged on the outer edge of the sample table along the long side direction of the groove; a circular rotating shaft is arranged in the center of the bottom of the sample table; the diameter ratio of the sample table to the rotating shaft is 5 to 8.

The upper part of the fixed support (6) is provided with a circular groove (7), the depth of the circular groove is matched with the thickness of the sample table, the center of the bottom of the circular groove is used for connecting a circular rotating shaft with a circular objective table through a bearing (12), and the inner side of the circular groove is symmetrically provided with excellent fixed magnets (9); the positioning device is matched with symmetrical positioning magnets (8) arranged in the long side direction of the groove in the outer edge of the sample table for use, and when the sample table rotates by 180 degrees, the two magnets attract each other to complete positioning; the center of the bottom of the circular groove is of a hollow cylindrical structure, and the inside of the circular groove is connected with a circular rotating shaft at the center of the bottom of the sample table through a bearing.

The knob (10) is positioned at the bottom of the device, and can drive the whole device to rotate when external force is applied to the knob.

The whole device needs to be placed in a dark box with a laser light source, and interference of external light is avoided in the measuring process.

The utility model has the advantages as follows.

(1) The utility model discloses fixed the light path, through the good fixed magnet of knob and sample platform and external fixed bolster connection, realized the rotation and the location of sample cell.

(2) The utility model discloses utilize the characteristics of the double flute of sample cell, measure the scattered light intensity of solvent and solution respectively, get rid of solvent scattered light intensity through the calculation, improved measuring accuracy.

(3) The utility model discloses utilize lens to gather the scattered light in a bit, solved the little problem of scattered light intensity.

Drawings

Fig. 1 is an overall structure diagram of the device of the present invention.

Fig. 2 is a front view of the device of the present invention.

Fig. 3 is a left side view of the device of the present invention.

Fig. 4 is a top view of the sample stage of the device of the present invention.

Fig. 5 isbase:Sub>A front sectional view taken alongbase:Sub>A-base:Sub>A direction of fig. 4.

Fig. 6 is a view showing the device of the present invention placed in a dark box.

In the figure: 1-a sample cell; 2-a sample stage; 3-blank liquid tank; 4-a sample tank; 5-a lens; 6-fixing a bracket; 7-a circular groove; 8-positioning a magnet; 9-fine fixed magnet; 10-knob; 11-a circular shaft; 12-a bearing; 13-grooves.

Detailed Description

Specific embodiments of the present invention are described in more detail below in conjunction with the following figures to provide a better understanding of the aspects of the present invention and the advantages of its various aspects.

The overall structure of the present invention can be better understood from fig. 1, 2 and 3, fig. 4 and 5 show the internal structure of the sample stage, and fig. 6 shows the position of the device in the dark box. The whole device comprises a sample cell (1), a sample table (2) and a fixed support (6). The sample cell is placed in a central clamping groove of the sample table, the center of the bottom of the sample table is connected with a circular groove (7) through a bearing (12) and a circular rotating shaft (11), and the circular rotating shaft is connected with a rotary knob (10).

According to the sample cell (1) shown in the figures 1, 3 and 4, the sample cell is divided into a blank liquid cell (3) and a sample liquid cell (4), a solvent and the solution are injected into the sample cell at the same time of measurement, after the sample cell is fixed in a groove of a sample table, the blank liquid cell is aligned to a laser light source, a dark box is closed, light of the laser light source is emitted onto the sample cell, scattered light is generated, and the scattered light is converged on a detector through a concave lens (5).

When the solvent in the blank groove is measured according to the graphs shown in fig. 2 and fig. 4, the knob (10) is rotated, and the knob drives the bearing (12) and the circular rotating shaft (11) to rotate; when the rotation angle reaches 180 degrees, the outer edge of the sample platform is symmetrically provided with positioning magnets (8) along the long side direction of the groove and is symmetrically provided with good fixed magnets (9) at the inner side of the circular groove to attract each other, so that the positioning is completed; at the moment, the sample tank is positioned at the original position of the blank liquid tank, scattered light is generated through laser irradiation, the scattered light is generated and converged on a detector through a concave lens (5), and information acquisition of a background and a sample to be detected is completed.

Application example 1: as shown in FIG. 5, the whole set of apparatus is fixed in a dark box with a laser light source, a solvent is injected into a blank liquid tank (3), and a newly synthesized sample liquid is injected into a sample tank (4). As shown in FIG. 1, the sample cell (1) is placed in the groove (13) of the sample stage (2) such that the blank liquid bath containing the solvent is aligned with the laser light source. Laser is emitted to a blank liquid tank, scattered light in the sample tank is converged at one point through a lens (5) and is transmitted to a detector, and information acquisition of the solvent is completed. As shown in figure 3, by rotating the knob (10), the sample stage is driven by the bearing (12) and the circular rotating shaft (11) to further drive the sample cell to rotate, and when the angle reaches 180 degrees, the positioning magnet (8) and the excellent fixed magnet (9) attract each other to complete positioning. The sample groove is positioned at the position of the blank liquid groove, so that laser is irradiated on the sample groove, and is converged at one point through the lens to be transmitted to the detector, and the information acquisition of the sample pool is completed. And finally, accurately obtaining the molecular weight of the sample by deducting the influence caused by the scattered light of the solvent. After measurement, the dark box is opened, the sample cell on the sample table is taken down, and the sample liquid and the blank liquid are taken out.

Application example 2: the whole set of device is fixed in a dark box with a laser light source, solvent water is injected into a blank liquid tank (3), and a newly synthesized water-soluble high molecular compound solution is injected into a sample tank (4). The sample cell (1) is placed in a groove (13) of the sample table (2), so that a blank liquid groove filled with water is aligned with the laser light source. Laser is emitted to a blank liquid tank, scattered light in the sample tank is converged at one point through a lens (5) and is transmitted to a detector, and information acquisition of the solvent water is completed. As shown in figure 3, by rotating the knob (10), the sample stage is driven by the bearing (12) and the circular rotating shaft (11) to further drive the sample cell to rotate, and when the angle reaches 180 degrees, the positioning magnet (8) and the excellent fixed magnet (9) attract each other to complete positioning. The sample groove is positioned at the position of the blank liquid groove, so that the laser is irradiated on the sample groove, and is converged at one point through the lens to be transmitted to the detector, and the information acquisition of the sample pool is completed. The molecular weight of the water-soluble high molecular compound is accurately obtained by deducting the influence caused by the scattered light of the solvent water. After the measurement, the dark box is opened, the sample cell on the sample stage is removed, and the water-soluble polymer solution and water are taken out.

Claims

1. A simple static light high molecular compound molecular weight testing device for a laboratory is characterized by comprising a sample cell (1), a sample table (2) and a fixed support (6); the sample cell is a double-groove sample cell formed by connecting a left convex mirror and a right convex mirror on the outer wall, and is positioned in a central clamping groove of the sample table; the double-groove sample pool is in a coplanar symmetrical structure and is divided into a blank liquid groove (3) and a sample groove (4); the sample table is connected with an external fixed support (6) through a bearing (12), and 180-degree rotation and positioning of the sample cell can be realized.

2. The device for testing the molecular weight of the simple static photo-polymer compound for the laboratory according to claim 1, wherein the aspect ratio of the sample cell (1) is 8 to 10; the left and right symmetrical convex lens is a convex lens (5) which is tightly attached to the outer surface of the double-groove sample cell and has a radian of 30-80 degrees; the distance between the upper edge and the lower edge of the convex lens and the joint of the upper edge and the lower edge of the convex lens and the sample cell is 1 in proportion to the height of the sample cell, and the bottom of the sample cell is matched and fixed with the groove (13) of the sample table.

3. The simple static light high molecular compound molecular weight testing device for the laboratory according to claim 1, wherein the sample stage (2) is a circular stage with a groove (13) at the center; the structure of the groove (13) is matched with the bottom of the sample cell (1); the depth of the groove is smaller than the distance between the lower edge of the bilateral symmetry convex mirror of the sample cell and the sample cell; positioning magnets (8) are symmetrically arranged on the outer edge of the sample table along the long side direction of the groove; a circular rotating shaft (11) is arranged at the center of the bottom of the sample table; the ratio of the diameters of the sample platform and the circular rotating shaft is 5 to 8.

4. The simple static light high molecular compound molecular weight testing device for the laboratory according to claim 1, wherein the upper part of the fixing support (6) is a circular groove (7); the depth of the circular groove is matched with the thickness of the sample table (2); good fixed magnets (9) are symmetrically arranged on the inner sides of the circular grooves; the center of the bottom of the circular groove is downward in a hollow cylindrical structure, and the inside of the circular groove is connected with a circular rotating shaft at the center of the bottom of the sample table through a bearing.

5. The simple static light high molecular compound molecular weight testing device for the laboratory according to claim 1, wherein the molecular weight of the high molecular compound can be measured with high precision by matching with a dark box, a laser light source and a detector.