A method and system for detecting the viscosity change of a surfactant

Abstract

The present invention belongs to the field of viscosity detection, involves data analysis technology, and is used to solve the problem that the existing detection methods for the viscosity change of surfactants cannot capture the viscosity change law of surfactants under complex conditions. Specifically, it is a detection method and system for the viscosity change of surfactants, including a viscosity actual detection module, a viscosity change detection module, a viscosity change analysis module, and a depth analysis module; the viscosity actual detection module, the viscosity change detection module, the viscosity change analysis module, and the depth analysis module are communicatively connected in sequence; the viscosity actual detection module is used to detect the actual viscosity, the viscosity change detection module is used to detect the viscosity under different conditions, the viscosity change analysis module is used to analyze the viscosity change of the surfactant, and the depth analysis module is used to deeply analyze the critical conditions of the viscosity change; the present invention can determine the threshold of the viscosity change and accurately capture the viscosity change law of the surfactant under complex conditions.

Description

Technical Field

[0001] The present invention belongs to the field of viscosity detection, involves data analysis technology, and specifically is a method and system for detecting the viscosity change of surfactants. Background Art

[0002] Surfactants are a class of organic compounds with a unique amphiphilic structure, that is, they contain both hydrophilic groups and lipophilic groups at the same time. Their amphiphilic structure enables them to reduce the surface tension and arrange directionally at the interface, thereby changing the surface properties and interfacial properties of the system. This is the basis for surfactants to exert various functions. For example, functions such as emulsification, dispersion, solubilization, foaming, and defoaming are all closely related to the reduction of surface tension.

[0003] Surfactants are widely used in many industrial fields and daily necessities. The viscosity characteristics of their solutions are one of the key factors affecting product performance and usage effects. The viscosity of surfactants is directly related to the fluidity of products and their adhesion to the surface of objects, thereby affecting the usage effects.

[0004] However, existing viscosity detection methods have many deficiencies. The detection accuracy is limited, and it is often difficult to accurately capture the viscosity change law of surfactants under complex conditions (such as temperature, concentration, etc.), nor can it accurately find the thresholds of different conditions at the moment when the viscosity changes from normal to abnormal.

[0005] In view of the above technical problems, this application proposes a solution. Summary of the Invention

[0006] The purpose of the present invention is to provide a method and system for detecting the viscosity change of surfactants, which are used to solve the problems that existing methods for detecting the viscosity change of surfactants cannot capture the viscosity change law of surfactants under complex conditions and cannot find the thresholds of different conditions at the moment when the viscosity changes from normal to abnormal;

[0007] The technical problem that the present invention needs to solve is: how to provide a method and system for detecting the viscosity change of surfactants that can capture the viscosity change law of surfactants under complex conditions and find the thresholds of different conditions at the moment when the viscosity changes from normal to abnormal.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A system for detecting the viscosity change of surfactants includes a viscosity actual detection module, a viscosity change detection module, a viscosity change analysis module, and a depth analysis module; the viscosity actual detection module, the viscosity change detection module, the viscosity change analysis module, and the depth analysis module are communicatively connected in sequence;

[0010] The viscosity actual detection module is used to detect the actual viscosity of the surfactant: Mark the surfactant to be detected for viscosity change as the analysis object, obtain the actual viscosity value NS of the analysis object and the standard viscosity range [MIN, MAX], and judge whether the viscosity of the analysis object meets the requirements by comparing the standard viscosity range [MIN, MAX] with the actual viscosity value NS;

[0011] The viscosity change detection module is used to detect the viscosity under different conditions: Mark the factors affecting the viscosity change of the surfactant as analysis parameters. The analysis parameters include temperature and concentration, and draw a viscosity - analysis parameter curve. The viscosity - analysis parameter curve includes a viscosity analysis value NF - concentration curve and a viscosity analysis value NF - temperature curve;

[0012] The viscosity change analysis module is used to analyze the viscosity change of the surfactant: Take the actual viscosity value NS detected under the condition of 100% mass fraction and T °C temperature in the viscosity actual detection module as the standard point, take different viscosity analysis values NF in the viscosity - analysis parameter curve as analysis points, and obtain the viscosity change rate NB of each analysis point relative to the standard point. Judge whether the viscosity change of the analysis object meets the requirements through the viscosity change rate NB;

[0013] The in - depth analysis module is used to deeply analyze the critical conditions of viscosity change: Obtain the critical curve, and judge the threshold of the analysis parameter at the moment when the viscosity change changes from normal to abnormal through the viscosity change rate NB corresponding to all integral points on the critical curve.

[0014] Further, the process of obtaining the actual viscosity value NS is as follows: Use a rotational viscometer to detect the viscosity of the analysis object: Place the analysis object with 100% mass fraction in the detection container, control the temperature at T °C through a water bath, set the rotor size, rotation speed, and measurement time with fixed parameters; Start the rotational viscometer, record the viscosity value after the reading is stable, and measure the same analysis object three times and take the average value to obtain the actual viscosity value NS.

[0015] Furthermore, the process of judging the viscosity of the analysis object includes: obtaining the standard viscosity range [MIN, MAX] of the analysis object, where MIN is the minimum standard viscosity and MAX is the maximum standard viscosity; comparing the actual viscosity value NS with the standard viscosity range [MIN, MAX]: if the actual viscosity value NS ≥ MAX or the actual viscosity value ≤ MIN, it is judged that the viscosity of the analysis object does not meet the requirements, and the analysis object is marked as an abnormal object; obtaining the production date, shelf life, and actual date of the abnormal object, calculating the expiration date through the production date and shelf life, and comparing the expiration date with the actual date: if the actual date exceeds the expiration date, it is determined that the reason for the abnormality is overtime deterioration; if the actual date does not exceed the expiration date, it is determined that the reason for the abnormality is production abnormality, and an abnormal signal is generated and sent to the mobile terminal of the management personnel; if the actual viscosity value NS ≥ MIN and the actual viscosity value ≤ MAX, it is judged that the viscosity of the analysis object meets the requirements, and a stability analysis of the viscosity change is performed.

[0016] Furthermore, the specific process of drawing the viscosity analysis value - concentration curve is as follows: mixing the surfactant with distilled water at a mass ratio of a%, 2a%,..., na%, where a is a positive integer representing the concentration interval, to prepare analysis objects with different concentrations; fixing the temperature of the analysis object at T °C through a water bath, and using a rotary viscometer to measure the viscosity of each group of analysis objects three times and taking the average value to obtain the viscosity analysis value NF; establishing a rectangular coordinate system with the concentration of the analysis object as the X-axis and the viscosity analysis value as the Y-axis, plotting points and drawing the viscosity analysis value NF - concentration curve.

[0017] Furthermore, the specific process of drawing the viscosity analysis value - temperature curve is as follows: controlling the temperature of the analysis object with a mass fraction of 100% at T + b °C, T + 2b °C,..., T + mb °C through a water bath, where b is a positive integer representing the temperature interval; using a rotary viscometer to measure the viscosity of each group of analysis objects three times and taking the average value to obtain the viscosity analysis value NF; establishing a rectangular coordinate system with the temperature of the analysis object as the X-axis and the viscosity analysis value as the Y-axis, plotting points and drawing the viscosity analysis value NF - temperature curve.

[0018] Further, numerical calculations are performed on the viscosity analysis value NF and the actual viscosity value NS in the viscosity - analysis parameter curve to obtain the viscosity change rate NB of each analysis point in the viscosity - analysis parameter curve relative to the standard point; the viscosity change rate NB is compared with the preset viscosity change threshold NBmax: if all the viscosity change rates NB are less than or equal to the viscosity change threshold NBmax, it is determined that the viscosity change of the analysis object meets the requirements and no processing is required; if there is a viscosity change rate NB greater than the viscosity change threshold NBmax, it is determined that there is a certain concentration or temperature at which the viscosity change of the analysis object does not meet the requirements after exceeding this concentration or temperature, and the concentration and temperature corresponding to the viscosity change rate NB that does not meet the requirements are respectively marked as the concentration critical value and the temperature critical value.

[0019] Further, the process of obtaining the critical curve includes: marking the concentration critical value and the temperature critical value as critical points, extending L1 unit lengths to both sides of the X - axis with the critical points as the mid - points of the X - axis in the viscosity - analysis parameter curve to form a critical region, and intercepting the viscosity - analysis parameter curve in the critical region as the critical curve. Then, there are (2*L1 + 1) integral points on the X - axis of the critical curve, and the difference between adjacent integral points is 1% mass fraction or 1°C temperature.

[0020] Further, the viscosity change rates NB corresponding to all integral points on the critical curve are compared with the preset viscosity change threshold NBmax: if there are two adjacent integral points, where one viscosity change rate NB is less than or equal to the viscosity change threshold NBmax, meeting the requirements, and the other viscosity change rate NB is greater than the viscosity change threshold NBmax, not meeting the requirements, it is determined that there is a concentration threshold or a temperature threshold at which the viscosity change of the analysis object does not meet the requirements after exceeding or falling below this threshold. On the contrary, if the viscosity change of the analysis object meets the requirements, the concentration or temperature corresponding to the integral point that meets the requirements is marked as the concentration threshold or temperature threshold for the viscosity change of the analysis object. The concentration threshold or temperature threshold represents the threshold of the analysis parameter when the viscosity change changes from normal to abnormal.

[0021] A method for detecting the viscosity change of a surfactant, comprising the following steps:

[0022] Step 1: Mark the surfactant to be detected for viscosity change as the analysis object, obtain the standard viscosity range [MIN, MAX] and the actual viscosity value NS of the analysis object, and compare the actual viscosity value NS with the standard viscosity range [MIN, MAX] to determine whether the viscosity of the analysis object meets the requirements;

[0023] Step 2: Mark the factors affecting the viscosity change of the surfactant as analysis parameters. The analysis parameters include temperature and concentration, and draw a viscosity - analysis parameter curve. The viscosity - analysis parameter curve includes a viscosity analysis value NF - concentration curve and a viscosity analysis value NF - temperature curve;

[0024] Step 3: Using the actual viscosity value NS detected under the conditions of 100% mass fraction and temperature of T °C in the actual viscosity detection module as the standard point, and using different viscosity analysis values NF in the viscosity - analysis parameter curve as the analysis points, perform numerical calculation on the viscosity analysis value NF and the actual viscosity value NS to obtain the viscosity change rate NB; compare the viscosity change rate NB with the preset viscosity change threshold NBmax to determine the concentration critical value and the temperature critical value;

[0025] Step 4: Using the concentration critical value and the temperature critical value as the critical points to obtain the critical region and the critical curve, compare the viscosity change rate NB corresponding to all integral points on the critical curve with the preset viscosity change threshold NBmax to determine the threshold of the analysis parameter at the moment when the viscosity change is from normal to abnormal.

[0026] The present invention has the following beneficial effects:

[0027] 1. By measuring the actual viscosity of the surfactant multiple times in the actual viscosity detection module and taking the average value, and comparing it with the standard viscosity range, it can accurately determine whether the viscosity meets the requirements and reduce misjudgment; at the same time, by promptly discovering the object with abnormal viscosity and analyzing the reasons for the abnormality, such as over - time deterioration or production abnormality, it helps to take measures to ensure product quality and reduce the occurrence of unqualified products;

[0028] 2. By considering the influence of factors such as temperature and concentration on the viscosity change in the viscosity change detection module and drawing the viscosity - analysis parameter curve, it helps to comprehensively understand the viscosity characteristics of the surfactant under different conditions;

[0029] 3. By calculating the viscosity change rate in the viscosity change analysis module and comparing it with the threshold, it can accurately evaluate the stability of the viscosity change of the surfactant and provide strong support for the research on the stability of product performance;

[0030] 4. By determining the critical value and threshold of the viscosity change in the in - depth analysis module, accurately capturing the viscosity change law of the surfactant under complex conditions, providing accurate condition limitations for the reasonable use of the surfactant, and helping to optimize the use environment and conditions in practical applications. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following - described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is the system block diagram of Embodiment 1 of the present invention;

[0033] Figure 2 This is the flowchart of the method according to the second embodiment of the present invention. Detailed implementation manners

[0034] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1: As Figure 1 shown, a detection system for the viscosity change of a surfactant includes a viscosity actual detection module, a viscosity change detection module, a viscosity change analysis module, and a depth analysis module; the viscosity actual detection module, the viscosity change detection module, the viscosity change analysis module, and the depth analysis module are communicatively connected in sequence.

[0036] The viscosity actual detection module is used to detect the actual viscosity of the surfactant: mark the surfactant to be detected for viscosity change as the analysis object, and use a rotary viscometer to detect the viscosity of the analysis object: place the analysis object with a mass fraction of 100% in the detection container, control the temperature at T °C through a water bath, set the rotor size, rotation speed, and measurement time with fixed parameters; start the rotary viscometer, record the viscosity value after the reading is stable, and perform three measurements on the same analysis object and take the average value to obtain the actual viscosity value NS; by taking the average value of multiple measurements of the actual viscosity of the surfactant by the viscosity actual detection module and comparing it with the standard viscosity range, it is possible to accurately judge whether the viscosity meets the requirements and reduce misjudgment;

[0037] Obtain the standard viscosity range [MIN, MAX] of the analysis object, where MIN is the minimum standard viscosity and MAX is the maximum standard viscosity; compare the actual viscosity value NS with the standard viscosity range [MIN, MAX]: if the actual viscosity value NS ≥ MAX or the actual viscosity value ≤ MIN, it is determined that the viscosity of the analysis object does not meet the requirements, and the analysis object is marked as an abnormal object; obtain the production date, shelf life duration, and actual date of the abnormal object, calculate the expiration date through the production date and shelf life duration, and compare the expiration date with the actual date: if the actual date exceeds the expiration date, it is determined that the reason for the abnormality is overtime deterioration; if the actual date does not exceed the expiration date, it is determined that the reason for the abnormality is production abnormality, and an abnormal signal is generated and sent to the mobile terminal of the management personnel; if the actual viscosity value NS ≥ MIN and the actual viscosity value ≤ MAX, it is determined that the viscosity of the analysis object meets the requirements, and a stability analysis of the viscosity change is carried out; by promptly discovering objects with abnormal viscosity and analyzing the reasons for the abnormality, such as overtime deterioration or production abnormality, it helps to take measures to ensure product quality and reduce the occurrence of unqualified products.

[0038] The viscosity change detection module is used to detect the viscosity under different conditions: mark the factors affecting the viscosity change of the surfactant as analysis parameters, the analysis parameters include temperature and concentration, and draw a viscosity - analysis parameter curve, the viscosity - analysis parameter curve includes a viscosity analysis value NF - concentration curve and a viscosity analysis value NF - temperature curve;

[0039] The specific process of drawing the viscosity analysis value - concentration curve is as follows: mix the surfactant with distilled water according to the mass ratios of a%, 2a%,..., na%, and configure analysis objects with different concentrations, where a is a positive integer representing the concentration interval; fix the temperature of the analysis object at T℃ through a water bath, use a rotary viscometer to measure the viscosity of each group of analysis objects three times and take the average value to obtain the viscosity analysis value NF; establish a rectangular coordinate system with the concentration of the analysis object as the X - axis and the viscosity analysis value as the Y - axis, plot points and draw the viscosity analysis value NF - concentration curve;

[0040] The specific process of drawing the viscosity analysis value - temperature curve is as follows: control the temperature of the analysis object with a mass fraction of 100% at T + b℃, T + 2b℃,..., T + mb℃ through a water bath, where b is a positive integer representing the temperature interval; use a rotary viscometer to measure the viscosity of each group of analysis objects three times and take the average value to obtain the viscosity analysis value NF; establish a rectangular coordinate system with the temperature of the analysis object as the X - axis and the viscosity analysis value as the Y - axis, plot points and draw the viscosity analysis value NF - temperature curve; by considering the influence of factors such as temperature and concentration on the viscosity change through the viscosity change detection module and drawing the viscosity - analysis parameter curve, it helps to comprehensively understand the viscosity characteristics of the surfactant under different conditions.

[0041] The viscosity change analysis module is used to analyze the viscosity change of surfactants: taking the actual viscosity value NS detected under the conditions of 100% mass fraction and T °C in the viscosity actual detection module as the standard point, and taking different viscosity analysis values NF in the viscosity - analysis parameter curve as the analysis points, through the formula Perform numerical calculations on the viscosity analysis value NF in the viscosity - analysis parameter curve and the actual viscosity value NS to obtain the viscosity change rate NB of each analysis point in the viscosity - analysis parameter curve relative to the standard point; compare the viscosity change rate NB with the preset viscosity change threshold NBmax: if all viscosity change rates NB are less than or equal to the viscosity change threshold NBmax, it is judged that the viscosity change of the analysis object meets the requirements and no processing is required; if there is a viscosity change rate NB greater than the viscosity change threshold NBmax, it is judged that there is a certain concentration or temperature, and after exceeding this concentration or temperature, the viscosity change of the analysis object does not meet the requirements, and the concentration and temperature corresponding to the viscosity change rate NB that does not meet the requirements are respectively marked as the concentration critical value and the temperature critical value; by calculating the viscosity change rate through the viscosity change analysis module and comparing it with the threshold, the stability of the viscosity change of surfactants can be accurately evaluated, providing strong support for the study of the stability of product performance.

[0042] The in - depth analysis module is used to conduct in - depth analysis on the critical conditions of viscosity change: mark the concentration critical value and the temperature critical value as critical points, in the viscosity - analysis parameter curve, with the critical point as the mid - point of the X - axis, extend L1 unit lengths to both sides of the X - axis to form a critical region, and intercept the viscosity - analysis parameter curve in the critical region as the critical curve. Then, there are (2*L1 + 1) integral points on the X - axis of the critical curve, and the mass fraction between adjacent integral points differs by 1% or the temperature differs by 1 °C; compare the viscosity change rate NB corresponding to all integral points on the critical curve with the preset viscosity change threshold NBmax: if there are two adjacent integral points, where the viscosity change rate NB of one is less than or equal to the viscosity change threshold NBmax and meets the requirements, and the viscosity change rate NB of the other is greater than the viscosity change threshold NBmax and does not meet the requirements, it is judged that there is a concentration threshold or a temperature threshold, and after exceeding or falling below this threshold, the viscosity change of the analysis object does not meet the requirements, otherwise the viscosity change of the analysis object meets the requirements, and mark the concentration or temperature corresponding to the integral point that meets the requirements as the concentration threshold or temperature threshold of the viscosity change of this analysis object. The concentration threshold or temperature threshold represents the threshold of the analysis parameter when the viscosity change changes from normal to abnormal; by determining the critical value and threshold of the viscosity change through the in - depth analysis module, accurately capturing the viscosity change law of surfactants under complex conditions provides accurate condition limits for the reasonable use of surfactants, which helps to optimize the use environment and conditions in practical applications.

[0043] Example 2: As Figure 2As shown in the figure, a method for detecting the viscosity change of a surfactant includes the following steps:

[0044] Step 1: Mark the surfactant to be detected for viscosity change as the analysis object, and use a rotary viscometer to detect the viscosity of the analysis object; obtain the standard viscosity range [MIN, MAX] of the analysis object, and compare the actual viscosity value NS with the standard viscosity range [MIN, MAX] to determine whether the viscosity of the analysis object meets the requirements.

[0045] Step 2: Mark the factors affecting the viscosity change of the surfactant as analysis parameters. The analysis parameters include temperature and concentration, and draw a viscosity - analysis parameter curve. The viscosity - analysis parameter curve includes a viscosity analysis value NF - concentration curve and a viscosity analysis value NF - temperature curve.

[0046] Step 3: Take the actual viscosity value NS detected under the conditions of 100% mass fraction and T °C in the actual viscosity detection module as the standard point, and take different viscosity analysis values NF in the viscosity - analysis parameter curve as analysis points. Perform numerical calculation on the viscosity analysis value NF and the actual viscosity value NS to obtain the viscosity change rate NB; compare the viscosity change rate NB with the preset viscosity change threshold NBmax to determine the concentration critical value and the temperature critical value.

[0047] Step 4: Take the concentration critical value and the temperature critical value as critical points to obtain the critical region and the critical curve. Compare the viscosity change rate NB corresponding to all integral points on the critical curve with the preset viscosity change threshold NBmax to determine the threshold of the analysis parameter at the moment when the viscosity change changes from normal to abnormal.

[0048] A method and system for detecting the viscosity change of a surfactant, during operation, mark the surfactant to be detected for viscosity change as the analysis object, compare the actual viscosity value NS of the analysis object with the standard viscosity range [MIN, MAX] to determine whether the viscosity of the analysis object meets the requirements; mark the factors affecting the viscosity change of the surfactant as analysis parameters and draw a viscosity - analysis parameter curve; perform numerical calculation on the viscosity analysis value NF and the actual viscosity value NS to obtain the viscosity change rate NB of each analysis point in the viscosity - analysis parameter curve relative to the standard point, compare the viscosity change rate NB with the preset viscosity change threshold NBmax to determine the concentration critical value and the temperature critical value; take the concentration critical value and the temperature critical value as critical points to obtain the critical region and the critical curve, and compare the viscosity change rate NB corresponding to all integral points on the critical curve with the preset viscosity change threshold NBmax to determine the threshold of the analysis parameter at the moment when the viscosity change changes from normal to abnormal.

[0049] The above content is only an example and illustration of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods to replace them. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all fall within the protection scope of the present invention.

[0050] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0051] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation manners. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art of this technology can well understand and utilize the present invention. The present invention is only limited by the claim book and its full scope and equivalents.

Claims

1. A system for detecting changes in surfactant viscosity, characterized in that: It includes a viscosity inspection module, a viscosity change detection module, a viscosity change analysis module and a depth analysis module; the viscosity inspection module, the viscosity change detection module, the viscosity change analysis module and the depth analysis module are sequentially connected in communication; The viscosity actual detection module is used to detect the actual viscosity of the surfactant: the surfactant to be detected for viscosity change is marked as the analysis object, the viscosity actual value NS and the standard viscosity range [MIN, MAX] of the analysis object are obtained, and the standard viscosity range [MIN, MAX] is compared with the viscosity actual value NS to determine whether the viscosity of the analysis object meets the requirements; The viscosity change detection module is used to detect the viscosity under different conditions: the factors affecting the viscosity change of the surfactant are marked as analysis parameters, the analysis parameters include temperature and concentration, and a viscosity-analysis parameter curve is drawn, the viscosity-analysis parameter curve includes a viscosity analysis value NF-concentration curve and a viscosity analysis value NF-temperature curve; The viscosity change analysis module is used to analyze the viscosity change of the surfactant: the actual viscosity value NS obtained by the viscosity actual inspection module under the conditions of 100% mass fraction and T°C is used as the standard point, the different viscosity analysis values ​​NF in the viscosity-analysis parameter curve are used as analysis points, and the viscosity change rate NB of each analysis point relative to the standard point is obtained, and the viscosity change rate NB is used to judge whether the viscosity change of the analysis object meets the requirements; The in-depth analysis module is used to perform in-depth analysis on the critical conditions of viscosity change: obtain the critical curve, and determine the threshold of the analysis parameter when the viscosity changes from normal to abnormal through the viscosity change rate NB corresponding to all integer points on the critical curve; The process of obtaining the critical curve includes: marking the concentration critical value and the temperature critical value as critical points, taking the critical point as the midpoint of the X-axis in the viscosity-analysis parameter curve, extending the critical region of L1 unit length on both sides of the X-axis, intercepting the viscosity-analysis parameter curve in the critical region as the critical curve, then there are (2*L1+1) integer points on the X-axis of the critical curve, and the difference between adjacent integer points is 1% mass fraction or 1°C temperature.

2. A system for detecting viscosity changes of surfactants according to claim 1, characterized in that: The process of obtaining the actual viscosity value NS is as follows: use a rotational viscometer to detect the viscosity of the analysis object: place the analysis object with a mass fraction of 100% in the detection container, control the temperature to T℃ through a water bath, set the fixed parameters of rotor size, speed and measurement time; start the rotational viscometer, record the viscosity value after the reading stabilizes, and measure the same analysis object three times to take the average value to obtain the actual viscosity value NS.

3. A system for detecting viscosity changes of surfactants according to claim 2, characterized in that: The judgment process of the viscosity of the analysis object includes: obtaining the standard viscosity range [MIN, MAX] of the analysis object, where MIN is the minimum value of the standard viscosity and MAX is the maximum value of the standard viscosity; comparing the actual viscosity value NS with the standard viscosity range [MIN, MAX]: if the actual viscosity value NS ≥ MAX or the actual viscosity value ≤ MIN, it is judged that the viscosity of the analysis object does not meet the requirements, and the analysis object is marked as an abnormal object; obtaining the production date, shelf life and actual date of the abnormal object, calculating the expiration date through the production date and shelf life, and comparing the expiration date with the actual date: if the actual date exceeds the expiration date, it is judged that the cause of the abnormality is overtime deterioration; if the actual date does not exceed the expiration date, it is judged that the cause of the abnormality is production abnormality, and an abnormal signal is generated and sent to the mobile phone terminal of the administrator.

4. A system for detecting viscosity changes of surfactants according to claim 3, characterized in that: If the actual viscosity value NS≥MIN and the actual viscosity value ≤MAX, it is judged that the viscosity of the analysis object meets the requirements, and the stability analysis of the viscosity change is performed.

5. A system for detecting viscosity changes of surfactants according to claim 4, characterized in that: The specific process of drawing the viscosity analysis value-concentration curve is as follows: the surfactant is mixed with distilled water in a mass ratio of a%, 2a%, ..., na% to prepare analysis objects of different concentrations, where a is a positive integer representing the concentration interval; the temperature of the analysis object is fixed at T℃ by a water bath, and the viscosity of each group of analysis objects is measured three times by a rotary viscometer and the average value is taken to obtain the viscosity analysis value NF; a rectangular coordinate system is established with the concentration of the analysis object as the X-axis and the viscosity analysis value as the Y-axis, and points are plotted and the viscosity analysis value NF-concentration curve is drawn.

6. A system for detecting viscosity changes of surfactants according to claim 5, characterized in that: The specific process of drawing the viscosity analysis value-temperature curve is as follows: the temperature of the analysis object with a mass fraction of 100% is controlled to T+b℃, T+2b℃, ..., T+mb℃ by a water bath, where b is a positive integer representing the temperature interval; the viscosity of each group of analysis objects is measured three times by a rotary viscometer and the average value is taken to obtain the viscosity analysis value NF; a rectangular coordinate system is established with the temperature of the analysis object as the X-axis and the viscosity analysis value as the Y-axis, and the points are plotted and the viscosity analysis value NF-temperature curve is drawn.

7. A system for detecting viscosity changes of surfactants according to claim 6, characterized in that: The viscosity analysis value NF and the viscosity actual value NS in the viscosity-analysis parameter curve are numerically calculated to obtain the viscosity change rate NB of each analysis point relative to the standard point in the viscosity-analysis parameter curve; the viscosity change rate NB is compared with the preset viscosity change threshold NBmax: if all viscosity change rates NB are less than or equal to the viscosity change threshold NBmax, it is judged that the viscosity change of the analysis object meets the requirements and no processing is required; if there is a viscosity change rate NB greater than the viscosity change threshold NBmax, it is judged that there is a certain concentration or temperature, after exceeding this concentration or temperature, the viscosity change of the analysis object does not meet the requirements, and the concentration and temperature corresponding to the viscosity change rate NB that does not meet the requirements are marked as the concentration critical value and the temperature critical value, respectively.

8. A system for detecting viscosity changes of surfactants according to claim 7, characterized in that: The viscosity change rate NB corresponding to all integer points on the critical curve is compared with the preset viscosity change threshold NBmax: if there are two adjacent integer points, one of which has a viscosity change rate NB less than or equal to the viscosity change threshold NBmax, which meets the requirements, and the other has a viscosity change rate NB greater than the viscosity change threshold NBmax, which does not meet the requirements, then it is judged that there is a concentration threshold or temperature threshold, and the viscosity change of the analysis object does not meet the requirements after exceeding or falling below the viscosity change threshold NBmax, otherwise the viscosity change of the analysis object meets the requirements, and the concentration or temperature corresponding to the integer point that meets the requirements is marked as the concentration threshold or temperature threshold of the viscosity change of the analysis object, and the concentration threshold or temperature threshold represents the threshold of the analysis parameter when the viscosity change changes from normal to abnormal.

9. A method for detecting a change in surfactant viscosity, characterized in that: The detection system according to any one of claims 1 to 8 is implemented, comprising the following steps: Step 1: Mark the surfactant to be tested for viscosity change as the analysis object, obtain the standard viscosity range [MIN, MAX] and the actual viscosity value NS of the analysis object, and compare the actual viscosity value NS with the standard viscosity range [MIN, MAX] to determine whether the viscosity of the analysis object meets the requirements; Step 2: Mark the factors that affect the viscosity change of the surfactant as analysis parameters, including temperature and concentration, and draw a viscosity-analysis parameter curve, which includes a viscosity analysis value NF-concentration curve and a viscosity analysis value NF-temperature curve; Step 3: Take the actual viscosity value NS obtained by the mass fraction of 100% and the temperature of T℃ in the viscosity inspection module as the standard point, take the different viscosity analysis values ​​NF in the viscosity-analysis parameter curve as the analysis point, and perform numerical calculation on the viscosity analysis value NF and the actual viscosity value NS to obtain the viscosity change rate NB; compare the viscosity change rate NB with the preset viscosity change threshold NBmax to determine the concentration critical value and the temperature critical value; Step 4: Take the concentration critical value and temperature critical value as the critical point to obtain the critical area and critical curve, compare the viscosity change rate NB corresponding to all integer points on the critical curve with the preset viscosity change threshold NBmax, and determine the threshold of the analysis parameter when the viscosity changes from normal to abnormal.

Images