Conductive adhesive for improving stability of electromagnetic detection sensor and preparation method

Abstract

The invention belongs to the technical field of electromagnetic detection, and particularly relates to a conductive adhesive for improving the stability of an electromagnetic detection sensor and a preparation method. The invention firstly provides a conductive adhesive for improving the stability of an electromagnetic detection sensor. The conductive adhesive comprises a first functional composition, a second functional composition and a function initiation component, the first functional composition is prepared from p-hydroxyanisole, 2-acrylamide-2-methylpropanesulfonic acid, acrylamide, sodium hydroxide and potassium chloride; the second functional composition comprises a dissolving agent, a viscosity agent, a humectant and water; the functional initiating component is composed of a photoinitiator and a cross-linking agent. The conductive adhesive prepared by the invention is high in data stability and low in alternating current impedance in electromagnetic detection.

Description

Technical Field

[0001] The present invention belongs to the technical field of electromagnetic detection, and in particular relates to a conductive adhesive for improving the stability of an electromagnetic detection sensor and a preparation method thereof. Background Art

[0002] Biomonitoring products (such as thermometers, blood pressure monitors, and ECG monitors) primarily use sensors (such as bandages and ECG electrodes) to measure parameters such as temperature and blood pressure in biological tissue. For healthy subjects, these parameters and test results are generally stable, unchanging, or repeatable. However, when testing patients, these parameters may show variations that differ from those in healthy subjects, thereby achieving clinical monitoring and disease detection. Sensor performance is a key factor in determining the accuracy of a test instrument, with stability being a crucial factor.

[0003] Traditional biomonitoring products, such as thermometers, blood pressure monitors, and electrocardiogram (ECG) monitors, do not require particularly high stability. They often only require detection of electrical signals followed by amplification, failing to meet the growing clinical demand for precise diagnostics. Electromagnetic field detection technology, a recently developed technology, enables non-invasive, digital, rapid, and low-cost accurate detection of the electrical conductivity of biological tissue. Electromagnetic field detection operates on the principle of detecting the response of an organism after receiving an output signal, a process characterized by signal emission and signal response. Therefore, only by ensuring sufficient stability can the detected signal truly reflect changes within the organism.

[0004] Current methods for determining sensor stability in electromagnetic field detection involve using the sensor to test healthy subjects for several hours. If the measured values remain stable and the error does not exceed a specified range, the sensor is considered stable. Based on this, the device is then used to test patients for the same period of time, and the changes in the detected values are used to reflect the patient's tissue or physiological pathology, thereby achieving the purpose of clinical monitoring. However, in practice, it has been found that the vast majority of existing bioelectrodes, after experimental testing, do not achieve the stability required for electromagnetic field biomonitoring, and the detection parameters continue to decline during continuous testing.

[0005] In summary, it is necessary to propose improvement strategies in terms of the composition or formulation of electrode materials to meet the increasingly prominent demand for precise detection in the field of electromagnetic detection. Summary of the Invention

[0006] The purpose of the present invention is to provide a material and preparation method for improving the stability of electromagnetic detection biosensors, partially solving or alleviating the above-mentioned deficiencies in the prior art. The present invention specifically adopts the following technical solutions.

[0007] A first aspect of the present invention is to provide a conductive adhesive for improving the stability of an electromagnetic detection sensor.

[0008] A conductive adhesive for improving the stability of (electroencephalogram) electromagnetic detection sensors, the conductive adhesive comprising a first functional composition, a second functional composition, and a functional initiating component; the first functional composition comprising p-hydroxyanisole, 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, sodium hydroxide, and potassium chloride; the p-hydroxyanisole serving as a polymerization inhibitor, the p-hydroxyanisole comprising no more than 0.1% of the total weight of the first functional composition; the second functional composition comprising a solubilizer, a viscosity agent, a humectant, and water; the functional initiating component comprising a photoinitiator and a crosslinker, the weight percentage of the photoinitiator being greater than the weight percentage of the crosslinker; the photoinitiator being 1-hydroxycyclohexyl phenyl ketone, and the crosslinker being N,N'-methylenebisacrylamide; The conductive adhesive specifically includes the following components in parts by weight: 0.01-0.05 parts of p-hydroxyanisole, 5-10 parts of 2-acrylamide-2-methylpropanesulfonic acid, 10-30 parts of acrylamide, 1-5 parts of sodium hydroxide, 1-5 parts of potassium chloride, 0.6-1.0 parts of 1-hydroxycyclohexyl phenyl ketone, 0.06-0.12 parts of N,N'-methylenebisacrylamide, 0.2-2 parts of a dissolving agent, 0.05-1.0 parts of a viscosity agent, 10-30 parts of a moisturizing agent, and 40-80 parts of distilled water.

[0009] In some preferred embodiments, the first functional composition consists of p-hydroxyanisole, 2-acrylamide-2-methylpropanesulfonic acid, acrylamide, sodium hydroxide and potassium chloride.

[0010] In some preferred embodiments, the second functional composition consists of a solubilizer, a viscosity agent, a moisturizer and water.

[0011] Furthermore, the dissolving agent is anhydrous ethanol.

[0012] Furthermore, the viscosity agent is polyethylene glycol diacrylate.

[0013] Furthermore, the moisturizing agent is glycerin.

[0014] In some embodiments, in the first functional composition, the ratio of the total weight of the p-hydroxyanisole, the 2-acrylamide-2-methylpropanesulfonic acid, the sodium hydroxide and the potassium chloride to the weight of the acrylamide is 0.5-0.7:1.

[0015] Furthermore, in the functional initiating component, the weight ratio of the photoinitiator to the crosslinking agent is 5-10:1.

[0016] In some preferred embodiments, the weight ratio of the photoinitiator to the crosslinker is 5:1-6:1.

[0017] Furthermore, the total weight of the p-hydroxyanisole, the 2-acrylamide-2-methylpropanesulfonic acid, the sodium hydroxide and the potassium chloride is less than the weight of the acrylamide.

[0018] In some embodiments, the p-hydroxyanisole is used as a polymerization inhibitor, and the weight portion of the polymerization inhibitor is less than the weight portion of the viscosity agent.

[0019] Preferably, the conductive adhesive specifically comprises the following components in parts by weight: 0.02 parts of p-hydroxyanisole, 6.6 parts of 2-acrylamide-2-methylpropanesulfonic acid, 20 parts of acrylamide, 2 parts of sodium hydroxide, 2.4 parts of potassium chloride, 0.6 parts of 1-hydroxycyclohexyl phenyl ketone, 0.1 parts of N,N'-methylenebisacrylamide, 0.2 parts of a solvent, 0.6 parts of a viscosity agent, 21 parts of a moisturizer and 50 parts of distilled water.

[0020] Another aspect of the present invention provides a method for preparing the conductive adhesive.

[0021] The preparation method of the conductive adhesive for improving the stability of the electromagnetic detection sensor is prepared based on the weight ratio of the conductive adhesive, and the specific steps are as follows: S01: Prepare pre-cooled sodium hydroxide solution and potassium chloride solution in advance; S02: dissolving p-hydroxyanisole in a solvent and stirring until completely dissolved to obtain an inhibitor solution; S03: Pour the polymerization inhibitor solution and distilled water into the stirrer together and stir for t1 to obtain the first mixed solution; S04: Pour 2-acrylamide-2-methylpropanesulfonic acid into a stirrer and mix with the first mixed solution. Set the stirring speed to 200-500 r / min and the stirring time to t2 to obtain a second mixed solution. The stirring time t2 is twice the stirring time t1. S05: pouring acrylamide and pre-cooled sodium hydroxide solution into a blender in sequence and mixing with the second mixed solution, stirring until completely dissolved and adjusting the pH value to a range of 5-7 to obtain a third mixed solution; S06: Pour 1-hydroxycyclohexyl phenyl ketone and N,N'-methylenebisacrylamide into the blender in sequence and mix with the third mixed solution for a stirring time of t3 to obtain a fourth mixed solution; wherein the stirring time t3 is equal to the stirring time t2; S07: Pour the viscosity agent into the stirrer and mix it with the fourth mixed solution for a stirring time of t4. After sufficient stirring, add the potassium chloride solution and continue stirring for a stirring time of t5 to obtain a fifth mixed solution; wherein the stirring time of t5 is twice the stirring time of t4; S08: adding the moisturizing agent into the blender and mixing with the fifth mixed solution, stirring until uniform to obtain a conductive adhesive solution; S09: curing the conductive adhesive solution through ultraviolet light to obtain the conductive adhesive for improving the stability of the electromagnetic detection sensor.

[0022] As a preference, the t1 is 5-10 minutes; the t2 is 10-20 minutes; the t4 is 5-10 minutes; and the t5 is 10-20 minutes.

[0023] As a preference, the stirring speed is set to 200-300 r / min.

[0024] Beneficial technical effects: The present invention first provides a conductive adhesive for improving the stability of electromagnetic detection sensors. The conductive adhesive is composed of a first functional composition, a second functional composition and a functional initiating component. The first functional composition mainly affects the conductive performance of the conductive adhesive. The second functional composition is mainly used to adjust the physical and chemical properties of the conductive adhesive (such as viscosity and thinness) and help the components dissolve. The functional initiating component is mainly used to trigger the reaction of each functional component.

[0025] The first functional composition of the present invention contains trace amounts of p-hydroxyanisole, which is commonly used as a polymerization inhibitor in gel-like substances. Patent publication number CN112225855A discloses a hydrogel formulation containing a large amount of p-hydroxyanisole (35-55 parts p-hydroxyanisole). However, the conductive adhesive formulation provided by the present invention contains only a very small amount of p-hydroxyanisole, demonstrating that the present invention provides a novel conductive adhesive formulation system.

[0026] Furthermore, the functional initiating component employed in the present invention includes both a photoinitiator and a crosslinker, with the weight of the photoinitiator exceeding that of the crosslinker. Experiments have confirmed that the preferred conductive adhesive prepared in this manner exhibits high data stability in electromagnetic testing (i.e., the data trend of the perturbation coefficient remains stable during actual testing), with no data fluctuations or decline in data trends. This reliable result meets the clinical needs for accurate testing (particularly in the field of electroencephalography). Furthermore, this preferred conductive adhesive exhibits low AC impedance.

[0027] In order to better meet the needs of electromagnetic testing, the most important performance of the conductive adhesive preferred by the present invention is the ability to maintain a stable perturbation coefficient during long-term instrument testing, and then further screen out formulas with lower AC impedance. In multiple groups of control experiments, it was found that the data stability of conductive adhesives with higher AC impedance is often poor, with large fluctuations, and completely unable to meet the requirements of clinical testing. However, in other control experiments, it was found that even when the AC impedance is very low, the perturbation coefficient still has significant fluctuations. Therefore, maintaining the stability of the perturbation coefficient during testing is the key to screening conductive adhesive formulas.

[0028] Finally, the present invention also provides a simple, rigorous and standardized method for preparing conductive adhesive. By dissolving and mixing the components step by step and then further performing photocuring polymerization, the quality of the conductive adhesive finally prepared is controllable and suitable for industrial standardized production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the description of the prior art. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the various elements or parts are not necessarily drawn according to the actual scale. Obviously, the drawings described below are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without inventive work.

[0030] Figure 1 This is a graph showing the test data results of an electrode sheet in one embodiment of the present invention; Figure 2 This is a graph showing test data results of a control electrode sheet 1 in one embodiment of the present invention; Figure 3 This is a graph showing the test data results of the control 2 electrode sheets in one embodiment of the present invention. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] As used herein, "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] Herein, "plurality" means two or more than two, ie, it includes two, three, four, five, etc.

[0034] As used in this specification, the term "about" typically means + / - 5% of the stated value, more typically + / - 4% of the stated value, more typically + / - 3% of the stated value, more typically + / - 2% of the stated value, even more typically + / - 1% of the stated value, and even more typically + / - 0.5% of the stated value.

[0035] Example 1 This embodiment provides a conductive adhesive formula for improving the stability of detection data of EEG detection equipment.

[0036] The conductive adhesive (first conductive adhesive) consists of a first functional composition, a second functional composition and a functional initiating component.

[0037] The first functional composition includes p-hydroxyanisole (polymerization inhibitor), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), acrylamide, sodium hydroxide, and potassium chloride (salt electrolyte). The first functional composition has a significant impact on the conductive properties of the conductive adhesive of the present invention.

[0038] The second functional composition includes anhydrous ethanol (solvent), polyethylene glycol diacrylate (viscosity agent), glycerin (humectant), and distilled water. The second functional composition is mainly used to adjust the physical and chemical properties of the conductive adhesive and to help dissolve the components.

[0039] Functional initiating components: 1-hydroxycyclohexyl phenyl ketone (photoinitiator), N,N'-methylenebisacrylamide (crosslinking agent). The functional initiating components are mainly used to initiate the reaction of the functional components.

[0040] Specifically, the conductive adhesive includes the following components in parts by weight: 0.02 parts of p-hydroxyanisole, 6.6 parts of 2-acrylamide-2-methylpropanesulfonic acid, 20 parts of acrylamide, 2 parts of sodium hydroxide, 2.4 parts of potassium chloride, 0.6 parts of 1-hydroxycyclohexyl phenyl ketone (photoinitiator 184), 0.1 parts of N,N'-methylenebisacrylamide, 0.2 parts of anhydrous ethanol, 0.6 parts of polyethylene glycol diacrylate, 21 parts of glycerol and 50 parts of distilled water.

[0041] This embodiment also provides an example of a method for preparing the conductive adhesive.

[0042] S01: Dissolve sodium hydroxide in part of the distilled water of the formula component (50 parts of distilled water), stir until completely dissolved, and let it cool to obtain a sodium hydroxide solution.

[0043] S02: Dissolve potassium chloride in the remaining distilled water of the formula components and stir until completely dissolved to obtain a potassium chloride solution.

[0044] S03: dissolving p-hydroxyanisole in anhydrous ethanol and stirring until completely dissolved to obtain an inhibitor solution.

[0045] S04: Pour the polymerization inhibitor solution and the remaining distilled water of the formula components into the stirrer and stir for a time of t1 to obtain a first mixed solution.

[0046] S05: Pour 2-acrylamide-2-methylpropanesulfonic acid into the stirrer and mix it with the first mixed solution. At this time, set the stirring speed to 200-300 r / min and the stirring time to t2 to obtain a second mixed solution.

[0047] Among them, the stirring time t2 is twice the stirring time t1.

[0048] Preferably, t1=5-10 min; t2=10-20 min.

[0049] S06: Pour acrylamide and the cooled sodium hydroxide solution into a blender in sequence and mix with the second mixed solution, stirring until completely dissolved. After stirring is complete, control the pH value to be between 5-7 to obtain a third mixed solution.

[0050] S07: Pour the photoinitiator and the cross-linking agent into the blender in sequence and mix with the third mixed solution for a stirring time of t3 to obtain a fourth mixed solution.

[0051] Among them, the stirring time t3 is equal to the stirring time t2.

[0052] S08: Pour the viscosity agent into the stirrer and mix it with the fourth mixed liquid for a stirring time of t4. After stirring sufficiently, add the potassium chloride solution and continue stirring for a stirring time of t5.

[0053] The stirring time t5 is twice the stirring time t4.

[0054] Preferably, t4 = 5-10 min; t5 = 10-20 min S9: Finally, add glycerin into the blender and stir until uniform to obtain a conductive adhesive solution.

[0055] S10: Curing the conductive adhesive solution by ultraviolet light to obtain a conductive adhesive; the curing time is several minutes to more than ten minutes.

[0056] This embodiment also provides an example of an application scenario of the conductive adhesive.

[0057] The conductive adhesive provided in this embodiment is used in conjunction with a non-invasive dynamic monitor for cerebral edema, which is equipped with a test line, an electrode sheet, and a display screen.

[0058] The conductive adhesive prepared in this example was used for EEG detection of healthy subjects. The data trend diagram of EEG detection of healthy subjects is shown in FIG. Figure 1 , Figure 1 The vertical axis represents the perturbation coefficient, and the horizontal axis represents the test time. The figure shows that the perturbation coefficient data trend remains stable after using the preferred conductive adhesive prepared in this example. Further testing of the AC impedance of this conductive adhesive showed that it had an AC impedance of 48 ohms.

[0059] Those skilled in the art will appreciate that the preferred conductive adhesive shown in this embodiment is merely an example and not a limitation.

[0060] Example 2 Control 1: Conductive adhesive formula: 0.02 parts p-hydroxyanisole; 0.2 parts anhydrous ethanol; 7 parts AMPS; 2 parts sodium hydroxide; 20 parts acrylamide; 2 parts polyethylene glycol diacrylate; 17 parts glycerin; 0.6 parts 1-hydroxycyclohexyl phenyl ketone; 1 part N,N'-methylenebisacrylamide; 1 part potassium chloride; 55 parts distilled water. In the conductive adhesive formula of Control 1, the weight ratio of crosslinker to inhibitor is 50:1; the weight of the crosslinker exceeds the weight of the photoinitiator.

[0061] The conductive glue of control 1 was mixed and prepared according to the method of Example 1. Then the conductive glue of control 1 was used on the electrode sheet of the same non-invasive brain edema dynamic monitor to detect the EEG of healthy subjects. The data trend diagram of the disturbance coefficient is shown in Figure 2 , Figure 2 The data showed significant fluctuations, indicating that the conductive adhesive prepared with this formula was not stable enough. Further testing of the AC impedance of the conductive adhesive with this formula showed that the AC impedance of the conductive adhesive was 46 ohms.

[0062] Control 1 provides a multivariable formula of conductive adhesive. The AC impedance of the conductive adhesive is low, only 46 ohms, but the data stability is found to be insufficient during testing.

[0063] Control 2: Conductive adhesive formula: 0.02 parts of p-hydroxyanisole; 0.2 parts of anhydrous ethanol; 6.6 parts of AMPS; 2 parts of sodium hydroxide; 20 parts of acrylamide; 0.6 parts of polyethylene glycol diacrylate; 21 parts of glycerol; 0.1 parts of N,N'-methylenebisacrylamide; 2.4 parts of potassium chloride; 50 parts of distilled water.

[0064] The conductive glue of control 2 was mixed and prepared in a similar manner to that of Example 1. Then the conductive glue of control 2 was used on the electrode sheet of the same non-invasive brain edema dynamic monitor to detect the EEG of healthy subjects. Figure 3 , Figure 3The data trend shows a downward trend, indicating that the conductive adhesive prepared with this formula is not stable enough. Further testing of the AC impedance of the conductive adhesive with this formula showed that the AC impedance of the conductive adhesive was 44 ohms.

[0065] The conductive adhesive of control 2 does not contain a photoinitiator. The AC impedance of the conductive adhesive of this formula is relatively low, only 44 ohms, but the data stability is found to be insufficient during testing.

[0066] The results of this example show that the conductive gels of Control 1 and Control 2 were insufficiently stable when used on electrodes for examinations of healthy subjects. Since stability is a crucial factor in determining whether a test instrument can accurately detect a living organism, the conductive gels of Control 1 and Control 2 were excluded.

[0067] Example 3 This embodiment provides performance tests of other proportions of conductive adhesives used for electromagnetic testing.

[0068] This example first provides performance tests of formulations with modified cross-linking agents, see Tables 1 and 2.

[0069] Table 1 Effect of crosslinking agent on AC impedance Note: In Table 1, the polymerization inhibitor is p-hydroxyanisole, the dissolving agent is anhydrous ethanol, the viscosity agent is polyethylene glycol diacrylate, the humectant is glycerol, the photoinitiator is 1-hydroxycyclohexyl phenyl ketone, the crosslinking agent is N,N'-methylenebisacrylamide, and the salt electrolyte is potassium chloride.

[0070] Table 2 Effect of cross-linking agent on perturbation coefficient This example then provides performance tests of formulations with changed photoinitiators, see Tables 3 and 4.

[0071] Table 3 Effect of photoinitiator on AC impedance Note: In Table 3, the polymerization inhibitor is p-hydroxyanisole, the dissolving agent is anhydrous ethanol, the viscosity agent is polyethylene glycol diacrylate, the humectant is glycerol, the photoinitiator is 1-hydroxycyclohexyl phenyl ketone, the crosslinking agent is N,N'-methylenebisacrylamide, and the salt electrolyte is potassium chloride.

[0072] Note: The formula of experimental groups 2-5 in Table 3 is consistent with that of experimental groups 1-5 in Table 1. However, since the two groups of experiments were measured at different times, the specific perturbation coefficient test results are slightly different, but within the normal error range.

[0073] Table 4 Effect of photoinitiator on perturbation coefficient The results of this example show that Groups 1-5 and 2-5 are preferred conductive adhesive formulations of the present invention, both demonstrating stable perturbation systems and low AC impedance, with AC impedances of 48 ohms (less than 50 ohms). However, the perturbation coefficients of the formulations with higher AC impedances fluctuated significantly, indicating a clear lack of stability. Furthermore, although the AC impedance of the conductive adhesive in Group 1-6 was also relatively low, at 46 ohms, fluctuations were also observed in its perturbation coefficient test. Since stability is a crucial factor in determining whether a detection instrument can accurately detect biological organisms, formulations with significant perturbation coefficient fluctuations or significant decreases in stability testing were not adopted. This shows that the photoinitiator and crosslinker significantly influence the performance of the conductive adhesive of the present invention. Only when the appropriate ratio is achieved can the conductive adhesive achieve both high stability and low AC impedance.

[0074] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A conductive adhesive for improving the stability of electromagnetic detection sensors, characterized in that: The conductive adhesive comprises a first functional composition, a second functional composition and a functional initiating component; the first functional composition comprises p-hydroxyanisole, 2-acrylamide-2-methylpropanesulfonic acid, acrylamide, sodium hydroxide and potassium chloride; the p-hydroxyanisole is used as a polymerization inhibitor, and the proportion of the p-hydroxyanisole in the first functional composition is no more than 0.1% of the total weight of the first functional composition; the second functional composition comprises a solubilizer, a viscosity agent, a moisturizer and water; the functional initiating component is composed of a photoinitiator and a crosslinking agent, and the weight portion of the photoinitiator is greater than the weight portion of the crosslinking agent; the photoinitiator is 1-hydroxycyclohexyl phenyl ketone, and the crosslinking agent is N,N'-methylenebisacrylamide; The conductive adhesive specifically includes the following components in parts by weight: 0.01-0.05 parts of p-hydroxyanisole, 5-10 parts of 2-acrylamide-2-methylpropanesulfonic acid, 10-30 parts of acrylamide, 1-5 parts of sodium hydroxide, 1-5 parts of potassium chloride, 0.6-1.0 parts of 1-hydroxycyclohexyl phenyl ketone, 0.06-0.12 parts of N,N'-methylenebisacrylamide, 0.2-2 parts of a dissolving agent, 0.05-1.0 parts of a viscosity agent, 10-30 parts of a moisturizing agent, and 40-80 parts of distilled water.

2. The conductive adhesive for improving the stability of electromagnetic detection sensors according to claim 1, characterized in that: The dissolving agent is anhydrous ethanol.

3. The conductive adhesive for improving the stability of electromagnetic detection sensors according to claim 1, characterized in that: The viscosity agent is polyethylene glycol diacrylate.

4. The conductive adhesive for improving the stability of electromagnetic detection sensors according to claim 1, characterized in that: The moisturizing agent is glycerin.

5. The conductive adhesive for improving the stability of electromagnetic detection sensors according to claim 1, characterized in that: In the functional initiating component, the weight ratio of the photoinitiator to the crosslinking agent is 5-10:

1.

6. The conductive adhesive for improving the stability of electromagnetic detection sensors according to claim 1, characterized in that: The total weight of the p-hydroxyanisole, the 2-acrylamide-2-methylpropanesulfonic acid, the sodium hydroxide and the potassium chloride is less than the weight of the acrylamide.

7. The conductive adhesive for improving the stability of electromagnetic detection sensors according to claim 1, characterized in that: The conductive adhesive specifically includes the following components in parts by weight: 0.02 parts of p-hydroxyanisole, 6.6 parts of 2-acrylamide-2-methylpropanesulfonic acid, 20 parts of acrylamide, 2 parts of sodium hydroxide, 2.4 parts of potassium chloride, 0.6 parts of 1-hydroxycyclohexyl phenyl ketone, 0.1 parts of N,N'-methylenebisacrylamide, 0.2 parts of a dissolving agent, 0.6 parts of a viscosity agent, 21 parts of a moisturizing agent, and 50 parts of distilled water.

8. The method for preparing the conductive adhesive for improving the stability of electromagnetic detection sensors according to any one of claims 1 to 7, characterized in that: The following steps are involved: S01: Prepare pre-cooled sodium hydroxide solution and potassium chloride solution in advance; S02: dissolving p-hydroxyanisole in a solvent and stirring until completely dissolved to obtain an inhibitor solution; S03: Pour the polymerization inhibitor solution and distilled water into the stirrer together and stir for t1 to obtain the first mixed solution; S04: Pour 2-acrylamide-2-methylpropanesulfonic acid into a stirrer and mix with the first mixed solution. Set the stirring speed to 200-500 r / min and the stirring time to t2 to obtain a second mixed solution. The stirring time t2 is twice the stirring time t1. S05: pouring acrylamide and pre-cooled sodium hydroxide solution into a blender in sequence and mixing with the second mixed solution, stirring until completely dissolved and adjusting the pH value to a range of 5-7 to obtain a third mixed solution; S06: Pour 1-hydroxycyclohexyl phenyl ketone and N,N'-methylenebisacrylamide into the blender in sequence and mix with the third mixed solution for a stirring time of t3 to obtain a fourth mixed solution; wherein the stirring time t3 is equal to the stirring time t2; S07: Pour the viscosity agent into the stirrer and mix it with the fourth mixed solution for a stirring time of t4. After sufficient stirring, add the potassium chloride solution and continue stirring for a stirring time of t5 to obtain a fifth mixed solution; wherein the stirring time of t5 is twice the stirring time of t4; S08: adding the moisturizing agent into the blender and mixing with the fifth mixed solution, stirring until uniform to obtain a conductive adhesive solution; S09: curing the conductive adhesive solution through ultraviolet light to obtain the conductive adhesive for improving the stability of the electromagnetic detection sensor.

9. The preparation method according to claim 8, wherein The t1 is 5-10 minutes; the t2 is 10-20 minutes; the t4 is 5-10 minutes; and the t5 is 10-20 minutes.

10. The preparation method according to claim 8, characterized in that Set the stirring speed to 200~300r / min.

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