Epoxy material analysis system and method based on electrophoresis technology

Abstract

The invention belongs to the technical field of epoxy resin materials, and particularly relates to an epoxy material analysis system and analysis method based on an electrophoresis technology. The epoxy material analysis system based on the electrophoresis technology comprises an electrophoresis generation module, a control module, an electrophoresis power supply, a detection module and a signal conversion module, the electrophoresis generation module, the detection module, the signal conversion module, the control module and the electrophoresis power supply are sequentially connected, the electrophoresis generation module is connected with the electrophoresis power supply to form a closed loop, and the control module is connected with the electrophoresis generation module. The analysis method adopts the epoxy material analysis system for analysis. According to the analysis method, the defects of a spectral analysis method and a chemical analysis method in the prior art are overcome, efficient and reliable analysis results can be obtained through the analysis method, detection of tiny samples can be achieved by adopting the method to analyze the epoxy material, and meanwhile the detection accuracy is improved. The analysis method also has the advantages of simple operation, environmental protection, no resource waste and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of epoxy resin materials, and in particular relates to an epoxy material analysis system and an analysis method based on electrophoresis technology. Background Art

[0002] Epoxy materials refer to organic polymer compounds containing two or more epoxy groups in the molecule. Except for a few, their relative molecular mass is not high. The molecular structure of epoxy materials is characterized by the presence of active epoxy groups in the molecular chain. Due to the presence of active epoxy groups in the molecule, epoxy materials need to be used in conjunction with various types of curing agents to undergo cross-linking reactions and form insoluble, infusible polymers with a three-dimensional network structure. The cured epoxy material has good physical and chemical properties and has excellent bonding strength to the surfaces of metal and non-metal materials. At the same time, it also has the advantages of good dielectric properties, small set shrinkage, good product dimensional stability, high hardness, good flexibility, and stable solubility to alkali and most substances. Therefore, it is widely used in various departments of national defense and national economy, and is often used for casting, gold lettering, laminating materials, adhesives, coatings, etc.

[0003] The same curing agent and epoxy materials with different epoxy values ​​will show different properties when cured. The epoxy value is a direct reflection of how much epoxy the epoxy material contains, which is defined as the equivalent number of epoxy groups in 100g of epoxy material (g). The epoxy equivalent weight (EEW) is directly related to the ratio of epoxy material and curing agent, which is defined as the mass number of epoxy material containing 1 gram of equivalent epoxy groups (g). The relationship between the two is EEW = 100 / epoxy value. In order to maximize the performance of epoxy materials in their use, researchers will carefully analyze the epoxy content of epoxy materials.

[0004] The methods available for qualitative or quantitative analysis of epoxy materials in the prior art include: spectral analysis or chemical analysis. Spectral analysis is easier to operate than chemical analysis, but requires the use of standard test samples to make quantitative lines. Spectral analysis often uses infrared spectroscopy, Raman spectroscopy or nuclear magnetic resonance spectroscopy for qualitative analysis of epoxy materials or quantitative analysis of epoxy groups.

[0005] For example, the operation method of infrared spectroscopy absorption method is: first, use the infrared spectra of a series of epoxy materials with known epoxy equivalents to make a A910cm -1 / A1610 cm -1 (910cm -1 is the absorption peak of epoxy group, 1610cm -1 is the absorption peak of the benzene ring) baseline, and then make A910cm -1 / A1610 cm -1The standard curve of epoxy equivalent. In this way, when determining the epoxy equivalent of a certain epoxy material sample, it is only necessary to know the A910 / M1610 ratio of the epoxy material to determine its epoxy equivalent. The commonly used chemical analysis method is to use excess hydrochloric acid in an appropriate solvent to react with the epoxy group to quantitatively generate chlorohydrin, and the excess hydrochloric acid is quantitatively titrated by alkaline titration. Commonly used solvents include acetone, anhydrous ether, pyridine, etc. Sometimes hydrochloric acid is not used, but hydrobromic acid, potassium iodide and hydrochloric acid, perchloric acid and quaternary ammonium bromide, etc. are used as halogenating agents for direct titration.

[0006] However, the methods used for qualitative or quantitative analysis of epoxy materials in the prior art have some defects. For example, the spectral analysis method has poor accuracy, easy peak shift, and the phenomenon that a small amount of impurities in some mixtures do not produce peaks, making it difficult to detect tiny samples. The chemical analysis method has the disadvantages of cumbersome operation, high requirements for reaction conditions, and waste of resources. Summary of the invention

[0007] Based on the above technical background, the main purpose of the present invention is to provide an epoxy material analysis system and analysis method based on electrophoresis technology to overcome the shortcomings of the prior art.

[0008] The present invention introduces electrophoresis technology, and the neutral particles of epoxy material move toward the electrode with opposite electrical properties under the action of electric field, which is called electrophoresis (EP). The technology of separating the neutral particles of epoxy material by using the different moving speeds in the electric field is called electrophoresis technology.

[0009] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention includes:

[0010] The first aspect of the present invention is to provide an epoxy material analysis system based on electrophoresis technology, the epoxy material analysis system based on electrophoresis technology includes an electrophoresis generation module, a control module, an electrophoresis power supply, a detection module, and a signal conversion module;

[0011] The electrophoresis module, the detection module, the signal conversion module, the control module and the electrophoresis power supply are connected in sequence. The electrophoresis module is connected to the electrophoresis power supply to form a closed loop. The control module is connected to the electrophoresis module.

[0012] Preferably, the electrophoresis module comprises a temperature control system, a heat dissipation system, an anode tank, an anode electrode tank liquid, a sample tank, a cathode tank, and a cathode tank liquid;

[0013] Preferably, in the electrophoresis module, the temperature control system is connected to the control module, and the other end of the control module is connected to the heat dissipation system;

[0014] Preferably, the anode tank is connected to the positive electrode of the electrophoresis power supply, and contains anode electrode tank liquid in the anode tank, and the cathode tank is connected to the negative electrode of the electrophoresis power supply, and contains cathode tank liquid in the cathode tank;

[0015] Preferably, one end of the sample tank is connected to the anode tank, and the other end is connected to the cathode tank.

[0016] More preferably, the electrophoresis module further comprises a vertical plate, and the vertical plate is vertically installed in the sample tank.

[0017] More preferably, the anode electrode tank solution is 0.3M Tris buffer, and the pH of the anode electrode tank solution is 9.4;

[0018] More preferably, the cathode tank solution is a mixture of 25 mM Tris and 40 mM sodium dodecyl sulfate, and the pH of the cathode tank solution is 7.4.

[0019] Preferably, the detection module comprises: a sensor, a connection port, and a signal acquisition card;

[0020] In the detection module, the sensor is installed on the vertical plate, the acquisition end of the signal acquisition card is connected to the connection port, the output end of the signal acquisition card is connected to the signal conversion module, and the sensor is connected to the connection port.

[0021] More preferably, the signal conversion module is connected to the signal acquisition card to receive the signal from the signal acquisition card; the signal conversion module is connected to the control module, and the signal conversion module converts the migration rate signals from different positions of the signal acquisition card into data signals, and transmits them to the control module for analyzing the epoxy material.

[0022] The second aspect of the present invention is to provide an epoxy material analysis method based on electrophoresis technology, wherein the epoxy material analysis method adopts the epoxy material analysis system based on electrophoresis technology described in the first aspect of the present invention to analyze the epoxy material.

[0023] Preferably, the analysis method comprises the following steps:

[0024] Step 1, pre-treating the epoxy material sample to be analyzed, then placing the pre-treated epoxy material sample into a sample tank, turning on the control module, and controlling the electrophoresis power supply to start working;

[0025] Step 2: After the electrophoresis starts, the epoxy material sample is separated under the action of the electric field and moves in the opposite direction of its electrode through the vertical plate. After a certain period of electrophoresis in the same electric field, the epoxy material particles of the epoxy material sample are separated from each other due to different moving distances;

[0026] Step 3, the sensor in the detection module detects epoxy material particles with different swimming speeds, and transmits the data to the signal conversion module after being collected by the signal acquisition card to complete the conversion. The control module uses the epoxy material particles with different swimming speeds detected by the detection module to obtain the data of epoxy material particles with different mobility, and obtains the analysis results of the epoxy material based on the detection of epoxy materials with different mobility.

[0027] More preferably, in step 1,

[0028] The pretreatment includes heating the epoxy material sample to be analyzed to 75-85° C., so that the epoxy material sample is heated to a gel state.

[0029] The beneficial effects of the present invention are:

[0030] (1) The epoxy material analysis system based on electrophoresis technology described in the present invention includes an electrophoresis generation module, a control module, an electrophoresis power supply, a detection module, and a signal conversion module; the analysis system uses the different moving speeds of neutral particles of epoxy materials in an electric field to achieve the purpose of separation. The ions with the fastest swimming speed go in the front, and the other ions are arranged in order of electrode speed to form different zones. Different epoxy material particles are distributed at different positions on the vertical plate. The control module in the analysis system uses the different swimming speeds of different epoxy material particles detected by the detection module to obtain the mobility of different epoxy material particles. Under certain conditions, the distance (i.e., mobility) moved by the epoxy material particles per unit time under the action of unit electric field strength is a constant, which is the physicochemical characteristic constant of the epoxy material particles. The control module obtains the analysis results of the epoxy material based on the detection of epoxy materials at different speeds.

[0031] (2) The present invention provides an epoxy material analysis method based on electrophoresis technology, which uses an analysis system for analysis. It overcomes the defects of the prior art spectral analysis method, such as poor accuracy, easy peak shift, the phenomenon that a small amount of impurities in the mixture do not produce peaks, and difficulty in detecting tiny samples. The analysis method of the present invention can obtain efficient and reliable analysis results. The use of this method for analyzing epoxy materials can realize the detection of tiny samples.

[0032] (3) The present invention provides an epoxy material analysis method based on electrophoresis technology, which overcomes the defects of the prior art chemical analysis, such as cumbersome operation, high requirements on reaction conditions, and waste of resources. When analyzing epoxy materials, the analysis method using electrophoresis technology can obtain data through simple operation without special reaction conditions. At the same time, the analysis process is environmentally friendly and does not waste resources, and the analysis results of the epoxy materials can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1A schematic diagram of an epoxy material analysis system based on electrophoresis technology is shown;

[0034] Figure 2 A schematic diagram of an electrophoresis module of an epoxy material analysis system based on electrophoresis technology is shown;

[0035] Figure 3 A schematic diagram of a detection module of an epoxy material analysis system based on electrophoresis technology is shown;

[0036] Figure 4 The separation results of the epoxy material of Example 1 are shown.

[0037] Description of Figure Numbers

[0038] 1-Electrophoresis module;

[0039] 2- Control module;

[0040] 3-Electrophoresis power supply;

[0041] 4-Detection module;

[0042] 5-Signal conversion module;

[0043] 6-Temperature control system;

[0044] 7- Cooling system;

[0045] 8- anode tank;

[0046] 9- anode electrode tank liquid;

[0047] 10-sample slot;

[0048] 11- vertical plate;

[0049] 12- cathode tank;

[0050] 13- cathode tank liquid;

[0051] 14- Sensor;

[0052] 15-Connection port;

[0053] 16-Signal acquisition card. DETAILED DESCRIPTION

[0054] The present invention will be described in detail below, and the characteristics and advantages of the present invention will become clearer and more distinct with the description.

[0055] A first aspect of the present invention is to provide an epoxy material analysis system based on electrophoresis technology, wherein the epoxy material analysis system based on electrophoresis technology comprises an electrophoresis generation module 1 , a control module 2 , an electrophoresis power supply 3 , a detection module 4 , and a signal conversion module 5 .

[0056] like Figure 1 The electrophoresis module 1, the detection module 4, the signal conversion module 5, the control module 2, and the electrophoresis power supply 3 are connected in sequence. The electrophoresis module 1 is connected to the electrophoresis power supply 3 to form a closed loop. The control module 2 is connected to the electrophoresis module 1.

[0057] The electrophoresis module 1 includes a temperature control system 6 , a heat dissipation system 7 , an anode tank 8 , an anode electrode tank solution 9 , a sample tank 10 , a vertical plate 11 , a cathode tank 12 , and a cathode tank solution 13 .

[0058] like Figure 2 As shown, in the electrophoresis generating module 1, the temperature control system 6 is connected to the control module 2, and the other end of the control module 2 is connected to the heat dissipation system 7. The anode tank 8 is connected to the positive electrode of the electrophoresis power source 3, and the anode electrode tank liquid 9 is contained in the anode tank 8. The cathode tank 12 is connected to the negative electrode of the electrophoresis power source 3, and the cathode tank liquid 13 is contained in the cathode tank 12. One end of the sample tank 10 is connected to the anode tank 8, and the other end is connected to the cathode tank 12. The vertical plate 11 is vertically installed in the sample tank 10.

[0059] The temperature control system 6 detects the temperature of the electrophoresis module 1 in real time, and controls the temperature of the electrophoresis module 1 through the control module 2 connected thereto.

[0060] Preferably, the temperature control system 6 is a PID temperature control system, which has the advantages of simple principle, easy implementation, wide applicability, independent control parameters, relatively simple parameter selection, and convenient adjustment.

[0061] The heat dissipation system 7 is used to dissipate heat during electrophoresis. Joule heat is generated during electrophoresis, which reduces the viscosity of the medium, accelerates the molecular movement, and increases the mobility. At the same time, excessively high temperature can denature and inactivate the biomacromolecules in the sample. Therefore, during electrophoresis, the voltage or current must be controlled, and a cooling and heat dissipation device can also be installed.

[0062] Preferably, the heat dissipation system 7 is a heat dissipation system of a DC fan, which overcomes the magnetic field loss caused by permanent magnet excitation and enables it to work in a synchronous working state. Compared with the variable frequency speed regulation of an asynchronous motor, the speed regulation of the DC fan is not only simple, but also has obvious advantages in speed.

[0063] The anode tank 8 is preferably made of a material that does not react with the anode electrode tank solution 9 .

[0064] The anode electrode bath solution 9 and the cathode electrode bath solution 13 cooperate to generate an electric field to drive the migration of epoxy material particles.

[0065] Preferably, the anode electrode tank solution is 0.3 M Tris buffer, and the pH of the anode electrode tank solution is 9.4.

[0066] The cathode tank 12 is preferably made of a material that does not react with the cathode tank solution 13 .

[0067] The cathode bath solution 13, together with the anode electrode bath solution 9, generates an electric field to drive the migration of epoxy material particles.

[0068] The cathode tank solution is a mixture of 25 mM Tris and 40 mM sodium dodecyl sulfate, and the pH of the cathode tank solution is 7.4.

[0069] The sample tank 10 is used to hold epoxy material samples. Under the action of electrophoresis, the epoxy material samples held in the sample tank 10 are driven by the anode electrode tank liquid 9 under the action of the electric field, and pass through the vertical plate 11 to reach the vicinity of the cathode tank 12.

[0070] The vertical plate 11, under the action of electrophoresis, moves the sample to be analyzed in the sample slot 10 toward the electrode with opposite electrical properties under the action of the electric field, so that the epoxy material sample contained in the sample slot 10 is driven by the electric field of the anode electrode tank liquid 9 and passes through the vertical plate 11 to reach the vicinity of the cathode slot.

[0071] In the present invention, the control module 2 is connected to the temperature control system 6 and the heat dissipation system 7 in the electrophoresis module 1 to control the temperature of the electrophoresis module 1 and stabilize the temperature in the electrophoresis module 1 .

[0072] The control module 2 is connected to the electrophoresis power supply 3 and is used to control the start and end of the electrophoresis detection.

[0073] The control module 2 is connected to the signal conversion module 5, and is used to receive the analysis data of the epoxy material from the signal conversion module 5. The signal conversion module 5 uses the different swimming speeds of different epoxy material particles detected by the detection module 4 to obtain the migration rate data converted from the migration signals of different epoxy material particles. According to the detection of epoxy materials with different migration rates, the analysis results of the epoxy materials are obtained, thereby completing the analysis of the epoxy materials.

[0074] The control module 2 is preferably an STM32 single-chip microcomputer, which has the advantages of high integration, small size, and better industrial noise resistance than general CPUs; it has strong processing capabilities and can complete multiple complex tasks in one chip; it supports multiple interfaces and is convenient for communicating with other devices; it has strong programmability and can adapt to various needs; it has low cost; it has low power consumption; and it has a fast processing speed.

[0075] The electrophoresis power supply 3 provides a direct current power supply for the epoxy material analysis system based on the electrophoresis technology.

[0076] The detection module 4 includes: a sensor 14 , a connection port 15 , and a signal acquisition card 16 .

[0077] like Figure 3 As shown, in the detection module 4 , the sensor 14 is installed on the vertical plate 11 , the acquisition end of the signal acquisition card 16 is connected to the connection port 15 , the output end of the signal acquisition card 16 is connected to the signal conversion module 5 , and the sensor 14 is connected to the connection port 15 .

[0078] The sensor 14 is used to detect the migration rate of epoxy material particles of the epoxy material sample passing through the vertical plate 11 , and transmit the position and migration rate signals thereof to the connection port 15 .

[0079] The sensor 14 is preferably a detector having a charge velocity measurement function.

[0080] Preferably, the connection port 15 is a multi-channel receiving port ( 15A / 15B) that can receive migration rate signals from different positions and transmit them to the signal acquisition card 16 .

[0081] The signal acquisition card 16 is used to collect epoxy material analysis data and transmit it to the signal conversion module 5 .

[0082] The signal conversion module 5 is connected to the signal acquisition card 16 to receive the signal from the signal acquisition card 16; the signal conversion module 5 is connected to the control module 2, and the signal conversion module 5 converts the migration rate signals from different positions from the signal acquisition card 16 into data signals, and transmits them to the control module 2 for analyzing the epoxy material.

[0083] The second aspect of the present invention is to provide an epoxy material analysis method based on electrophoresis technology, wherein the epoxy material analysis method adopts the epoxy material analysis system based on electrophoresis technology described in the first aspect of the present invention to analyze the epoxy material.

[0084] The analytical method comprises the following steps:

[0085] Step 1, pre-treat the epoxy material sample to be analyzed, then put the pre-treated epoxy material sample into the sample tank 10, turn on the control module 2, and the control module 2 controls the electrophoresis power supply 3 to start working;

[0086] Step 2: After the electrophoresis starts, the epoxy material sample is separated under the action of the electric field and moves in the opposite direction of its electrode through the vertical plate 11. After a certain period of electrophoresis in the same electric field, the epoxy material particles of the epoxy material sample are separated from each other due to different moving distances;

[0087] Step 3, the sensor 14 in the detection module 4 detects epoxy material particles with different swimming speeds, and transmits the data to the signal conversion module 5 after being collected by the signal acquisition card 16 for conversion. The control module 2 uses the epoxy material particles with different swimming speeds detected by the detection module 4 to obtain the data of epoxy material particles with different mobility, and obtains the analysis results of the epoxy material based on the detection of epoxy materials with different mobility.

[0088] The above steps are described in detail below.

[0089] In step 1, the epoxy material sample to be analyzed is pretreated before the electrophoresis begins, so that the result of the electrophoresis analysis of the epoxy material is more reliable.

[0090] The pretreatment includes heating the epoxy material sample to be analyzed to 75-85° C., preferably to 80° C., so that the epoxy material sample is heated to a gel state.

[0091] After the pre-treated epoxy material sample is dropped into the sample tank 10 and remains still for a period of time, the control module 2 is turned on, and the control module 2 controls the electrophoresis power supply 3 to start working and send a driving signal.

[0092] In step 2, after the electrophoresis starts, according to the difference in dielectric properties of neutral particles of different epoxy material components, under the action of a DC electric field, an insulating column is added to twist the internal electric lines to obtain a non-uniform electric field. Under the action of the non-uniform electric field, neutral particles of different epoxy material components induce charges in the contact part with the buffer solution due to polarization. The induced charges and the non-uniform electric field work together to make the neutral particles of different epoxy material components migrate at different rates, so that the epoxy material sample is separated under the action of the electric field, and moves in the opposite direction of its electrode through the vertical plate 11. After a certain period of time, they are separated from each other due to different moving distances during electrophoresis in the same electric field.

[0093] The separation distance is proportional to the voltage of the external electric field and the electrophoresis time. The fastest moving epoxy material particles go in the front, and the other particles are arranged in the order of electrode speed to form different zones. Different epoxy material particles are distributed at different positions on the vertical plate.

[0094] In step 3, the sensor 14 in the detection module 4 detects epoxy material particles of different swimming speeds, and the signal is collected by the signal acquisition card 16 and then transmitted to the signal conversion module 5 for conversion.

[0095] The control module 2 obtains the detection data of epoxy material particles with different mobility by using the epoxy material particles with different swimming speeds detected by the detection module 4. Under certain conditions, the distance (i.e., mobility) that the epoxy material particles move per unit time under the unit electric field strength is a constant, which is the physicochemical characteristic constant of the epoxy material particles. According to the detection of epoxy materials with different swimming speeds, the analysis results of the epoxy material are obtained.

[0096] Specifically, epoxy material particles with different migration rates are generated after epoxy material electrophoresis. This is because based on the dielectric differences of neutral particles of different epoxy material components, a non-uniform electric field is obtained by adding insulating columns to twist the internal electric lines under the action of a DC electric field. Under the action of the non-uniform electric field, neutral particles of different epoxy material components induce charges in the contact part with the buffer solution due to polarization. The induced charges work together with the non-uniform electric field to cause neutral particles of different epoxy material components to migrate at different rates.

[0097] In the electrophoresis analysis of epoxy materials, interdigitated electrodes are mounted on the vertical plate 11 to generate a non-uniform electric field.

[0098] During the electrophoresis process, epoxy particles are subjected to the dielectrophoretic force under the action of the electric field and are accelerated in the direction of the dielectrophoretic force. At the same time, the epoxy particles are also subjected to the Stokes resistance in the opposite direction of the acceleration. According to Newton's second law, the resultant force on the epoxy particles during the electrophoresis process can be expressed as formula (1):

[0099]

[0100] In formula (1):

[0101] m represents the mass of epoxy material particles;

[0102] represents the acceleration of epoxy material particles;

[0103] F dep represents the dielectrophoretic force, which can be expressed by formula (2):

[0104]

[0105] In formula (2):

[0106] E represents the strength of the applied electric field;

[0107] r represents the radius of the epoxy material particle;

[0108] ε m represents the dielectric constant of the buffer;

[0109] Re refers to taking the real part of the complex number;

[0110] CM stands for Clausius-Mossotti factor.

[0111] F drag Stokes resistance can be expressed by formula (3):

[0112] F drag =-6πcηr(u p -u f ) Formula (3);

[0113] In formula (3):

[0114] u p Indicates the movement speed of epoxy material particles (m / s);

[0115] u f Indicates the velocity of the fluid (m / s);

[0116] r represents the radius of the epoxy material particle (m);

[0117] c represents the near-wall correction factor;

[0118] η represents the viscosity coefficient of the fluid.

[0119] Since the epoxy material particles move at a uniform speed during the electrophoresis process, the epoxy material particles are in a state of force balance, that is, F dep =F drag , we can get formula (4):

[0120]

[0121] From the above formula (4), it can be obtained that the migration speed of epoxy material particles at a certain moment is formula (5):

[0122]

[0123] By integrating equation (5) over time, we can obtain the instantaneous position of the epoxy material particles, i.e., the motion trajectory equation (6):

[0124]

[0125] The electrophoretic trajectory of epoxy material particles is related to the properties of the particles. For an epoxy material particle, under the conditions of certain mass and volume, the movement trajectory of the particle is certain. Different epoxy material components produce different electrophoretic trajectories under the action of electrophoresis. By analyzing the epoxy material components aggregated after electrophoresis with different electrophoretic trajectories, the data of different components of the epoxy material can be obtained, that is, the content of different components of the epoxy material.

[0126] Example

[0127] The present invention is further described below by means of specific examples. These embodiments are only intended to illustrate the present invention but are not intended to limit the scope of the present invention.

[0128] Example 1

[0129] This embodiment provides an epoxy material analysis system based on electrophoresis technology, and the epoxy material analysis system based on electrophoresis technology includes an electrophoresis generation module 1, a control module 2, an electrophoresis power supply 3, a detection module 4, and a signal conversion module 5. Figure 1 The electrophoresis module 1, the detection module 4, the signal conversion module 5, the control module 2, and the electrophoresis power supply 3 are connected in sequence. The electrophoresis module 1 is connected to the electrophoresis power supply 3 to form a closed loop. The control module 2 is connected to the electrophoresis module 1.

[0130] The electrophoresis module 1 includes a temperature control system 6 , a heat dissipation system 7 , an anode tank 8 , an anode electrode tank solution 9 , a sample tank 10 , a vertical plate 11 , a cathode tank 12 , and a cathode tank solution 13 .

[0131] like Figure 2 As shown, in the electrophoresis generating module 1, the temperature control system 6 is connected to the control module 2, and the other end of the control module 2 is connected to the heat dissipation system 7. The anode tank 8 is connected to the positive electrode of the electrophoresis power supply 3, and the anode electrode tank liquid 9 is contained in the anode tank 8. The cathode tank 12 is connected to the negative electrode of the electrophoresis power supply 3, and the cathode tank liquid 13 is contained in the cathode tank 12. One end of the sample tank 10 is connected to the anode tank 8, and the other end is connected to the cathode tank 12. The vertical plate 11 is vertically installed in the sample tank 10. The temperature control system 6 is a PID temperature control system, and the heat dissipation system 7 is a heat dissipation system of a DC fan. The anode tank 8 is made of a material that does not react with the anode electrode tank liquid 9, and the anode electrode tank liquid is 0.3M Tris buffer, and the pH of the anode electrode tank liquid is 9.4. The cathode tank 12 is made of a material that does not react with the cathode tank liquid 13, and the cathode tank liquid is a mixed solution of 25mM Tris and 40mM sodium dodecyl sulfate, and the pH of the cathode tank liquid is 7.4.

[0132] The control module 2 is an STM32 single chip microcomputer.

[0133] The detection module 4 includes: a sensor 14, a connection port 15, and a signal acquisition card 16. Figure 3 As shown, in the detection module 4, the sensor 14 is installed on the vertical plate 11, the acquisition end of the signal acquisition card 16 is connected to the connection port 15, the output end of the signal acquisition card 16 is connected to the signal conversion module 5, and the sensor 14 is connected to the connection port 15. The connection port 15 is a multi-channel receiving port (15A / 15B), which can receive migration rate signals from different positions and transmit them to the signal acquisition card 16.

[0134] The signal conversion module 5 is connected to the signal acquisition card 16 to receive the signal from the signal acquisition card 16; the signal conversion module 5 is connected to the control module 2, and the signal conversion module 5 converts the migration rate signals from different positions from the signal acquisition card 16 into data signals, and transmits them to the control module 2 for analyzing the epoxy material.

[0135] Example 2

[0136] This embodiment provides an epoxy material analysis method based on electrophoresis technology. The epoxy material analysis method uses the epoxy material analysis system based on electrophoresis technology described in Example 1 to analyze the epoxy material.

[0137] Before the electrophoresis starts, the epoxy material sample to be analyzed is pretreated, and the pretreatment includes heating the epoxy material sample to be analyzed to 80° C. to make the epoxy material sample gelatinous. After the pretreated epoxy material sample is dropped into the sample tank 10 and left to stand for a period of time, the control module 2 is turned on, and the control module 2 controls the electrophoresis power supply 3 to start working and send a driving signal.

[0138] After the electrophoresis begins, according to the difference in dielectric properties of neutral particles of different epoxy material components, under the action of the DC electric field, insulating columns are added to distort the internal electric lines to obtain a non-uniform electric field. Under the action of the non-uniform electric field, neutral particles of different epoxy material components induce charges in the part in contact with the buffer solution due to polarization. The induced charges and the non-uniform electric field work together to make neutral particles of different epoxy material components migrate at different rates, so that the epoxy material sample is separated under the action of the electric field, and moves in the opposite direction of its electrode through the vertical plate 11. After a certain period of time, they are electrophoresed in the same electric field and separated from each other due to different moving distances. The separation distance is proportional to the voltage of the external electric field and the electrophoresis time. The epoxy material particles with the fastest swimming speed are at the front, and the other particles are arranged in order of electrode speed to form different zones. Different epoxy material particles are distributed at different positions on the vertical plate, such as Figure 4 shown.

[0139] The sensor 14 in the detection module 4 detects epoxy material particles of different swimming speeds, and after being collected by the signal acquisition card 16, it is transmitted to the signal conversion module 5 for conversion. The control module 2 uses the epoxy material particles of different swimming speeds detected by the detection module 4 to obtain the detection data of epoxy material particles of different mobility. Under certain conditions, the distance (i.e., mobility) moved per unit time by the epoxy material particles under the unit electric field strength is a constant, which is the physicochemical characteristic constant of the epoxy material particles. According to the detection of epoxy materials of different swimming speeds, the analysis results of the epoxy materials are obtained.

[0140] Through the motion trajectory equation (6):

[0141] The electrophoretic trajectories of different epoxy material particles are obtained. The electrophoretic trajectories of epoxy material particles are related to the properties of the particles. For a type of epoxy material particle, under the conditions of certain mass and volume, the movement trajectory of the particle is certain. By analyzing the epoxy material components gathered after electrophoresis with different electrophoretic trajectories, the data of different components of the epoxy material can be obtained, that is, the content of different components of the epoxy material.

[0142] The present invention has been described in detail above in conjunction with specific implementations and exemplary examples, but these descriptions cannot be understood as limiting the present invention. Those skilled in the art understand that, without departing from the spirit and scope of the present invention, a variety of equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its implementation methods, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

Claims

1. An epoxy material analysis system based on electrophoresis technology, characterized in that: The epoxy material analysis system based on electrophoresis technology includes an electrophoresis generation module, a control module, an electrophoresis power supply, a detection module, and a signal conversion module; The electrophoresis module, the detection module, the signal conversion module, the control module and the electrophoresis power supply are connected in sequence. The electrophoresis module is connected to the electrophoresis power supply to form a closed loop. The control module is connected to the electrophoresis module.

2. The epoxy material analysis system based on electrophoresis technology according to claim 1, characterized in that: The electrophoresis module includes a temperature control system, a heat dissipation system, an anode tank, an anode electrode tank liquid, a sample tank, a cathode tank, and a cathode tank liquid; In the electrophoresis module, the temperature control system is connected to the control module, and the other end of the control module is connected to the heat dissipation system; The anode tank is connected to the positive electrode of the electrophoresis power supply, and contains the anode electrode tank liquid. The cathode tank is connected to the negative electrode of the electrophoresis power supply, and contains the cathode tank liquid. One end of the sample tank is connected to the anode tank, and the other end is connected to the cathode tank.

3. The epoxy material analysis system based on electrophoresis technology according to claim 2 is characterized in that: The electrophoresis module further comprises a vertical plate, which is vertically installed in the sample tank.

4. The epoxy material analysis system based on electrophoresis technology according to claim 2, characterized in that: The anode electrode tank solution is 0.3 M Tris buffer, and the pH of the anode electrode tank solution is 9.4; The cathode tank solution is a mixture of 25 mM Tris and 40 mM sodium dodecyl sulfate, and the pH of the cathode tank solution is 7.

4.

5. The epoxy material analysis system based on electrophoresis technology according to claim 1, characterized in that: The detection module includes: a sensor, a connection port, and a signal acquisition card; In the detection module, the sensor is installed on the vertical plate, the acquisition end of the signal acquisition card is connected to the connection port, the output end of the signal acquisition card is connected to the signal conversion module, and the sensor is connected to the connection port.

6. The epoxy material analysis system based on electrophoresis technology according to claim 5, characterized in that: The signal conversion module is connected to the signal acquisition card to receive the signal from the signal acquisition card; the signal conversion module is connected to the control module, and the signal conversion module converts the migration rate signals from different positions of the signal acquisition card into data signals, and transmits them to the control module for analyzing the epoxy material.

7. An epoxy material analysis method based on electrophoresis technology, characterized in that: The epoxy material analysis method adopts the epoxy material analysis system based on electrophoresis technology as described in any one of claims 1 to 6 to analyze the epoxy material.

8. The epoxy material analysis method based on electrophoresis technology according to claim 7, characterized in that: The analytical method comprises the following steps: Step 1, pre-treating the epoxy material sample to be analyzed, then placing the pre-treated epoxy material sample into a sample tank, turning on the control module, and controlling the electrophoresis power supply to start working; Step 2: After the electrophoresis starts, the epoxy material sample is separated under the action of the electric field and moves in the opposite direction of its electrode through the vertical plate. After a certain period of electrophoresis in the same electric field, the epoxy material particles of the epoxy material sample are separated from each other due to different moving distances; Step 3, the sensor in the detection module detects epoxy material particles with different swimming speeds, and transmits the data to the signal conversion module after being collected by the signal acquisition card to complete the conversion. The control module uses the epoxy material particles with different swimming speeds detected by the detection module to obtain the data of epoxy material particles with different mobility, and obtains the analysis results of the epoxy material based on the detection of epoxy materials with different mobility.

9. The epoxy material analysis method based on electrophoresis technology according to claim 8, characterized in that: In step 1, The pretreatment includes heating the epoxy material sample to be analyzed to 75-85° C., so that the epoxy material sample is heated to a gel state.

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