CN117907266A - Detection device and detection method for interface water - Google Patents
Detection device and detection method for interface water Download PDFInfo
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- CN117907266A CN117907266A CN202410082588.3A CN202410082588A CN117907266A CN 117907266 A CN117907266 A CN 117907266A CN 202410082588 A CN202410082588 A CN 202410082588A CN 117907266 A CN117907266 A CN 117907266A
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Abstract
The invention provides a detection device and a detection method for interface water, which relate to the technical field of interface water detection and comprise a sample cavity, a humidity loading device connected with the sample cavity, a temperature control device connected with the sample cavity, a data acquisition system and an infrared spectrum system; the sample cavity is internally provided with an outer cavity and an inner cavity, and the outer cavity is arranged around the inner cavity. The humidity loading device and the temperature control device are introduced to ensure the stability of the environmental humidity and the temperature in the sample cavity in the experimental process, so that the purpose of measuring infrared spectrograms of the interface water changing along with the humidity at different temperatures is realized. Meanwhile, the data acquisition system and the infrared spectrum system are adopted, so that automatic testing within a certain time can be realized, and dynamic detection of the interface water freezing process can be realized. The method solves the technical problems that in the prior art, the thickness of the interface water is affected by the fluctuation of humidity and temperature under the environmental condition due to the fact that the interface water is exposed to the air environment during detection, so that the accuracy of a detection result is low.
Description
Technical Field
The invention relates to the technical field of interface water detection, in particular to a detection device and a detection method for interface water.
Background
Since the water-solid interface is an important place where many physical and chemical processes occur, such as dissolution, lubrication, corrosion, electrochemistry, heterogeneous catalysis, etc., the interfacial water system is one of the important research directions in the research water science field. The interaction of the water-solid interface determines a plurality of unique properties of the water-solid interface, the structural information of the water-solid interface is needed to be obtained by going deep into the water molecules and even the atomic level in order to analyze the properties, and the infrared spectrum is sensitive to water and other polar molecules, so that the infrared spectrum technology is widely applied to interface water systems as an important research means.
However, the conventional experimental method directly exposes the interfacial water to the air environment, so that it is difficult to avoid the influence of humidity and temperature fluctuation under the environmental conditions on the thickness of the interfacial water, namely, a thinner interfacial water molecule layer is maintained, and in addition, the temperature has a certain influence on the air and water structure, so that the stability of the temperature in the sample cavity is required to be ensured in the experimental process.
In view of this, the present invention has been made.
Disclosure of Invention
The invention aims to provide a detection device for interface water, which solves the technical problem that in the prior art, the thickness of the interface water is affected by humidity and temperature fluctuation under the environmental condition due to the fact that the interface water is exposed to an air environment during detection, so that the accuracy of a detection result is low.
The second object of the present invention is to provide a detection method using the above detection device for interfacial water.
In order to achieve the above object of the present invention, the following technical solutions are specifically adopted:
In a first aspect, the invention provides a detection device for interfacial water, comprising a sample cavity, a humidity loading device connected with the sample cavity, a temperature control device connected with the sample cavity, a data acquisition system and an infrared spectrum system;
an outer cavity and an inner cavity are arranged in the sample cavity, and the outer cavity is arranged around the inner cavity;
The humidity loading device is communicated with the inner cavity and is used for adjusting the humidity of the inner cavity and forming interfacial water on the surface of the substrate material;
The temperature control device is communicated with the outer cavity and is used for adjusting the temperature of the inner cavity;
the inner cavity is used for providing a detection space for interface water, and the inner cavity, the data acquisition system and the infrared spectrum system are mutually matched for interface water detection.
Further, the sample chamber further comprises an outer shell and an inner shell arranged inside the outer shell, the outer chamber is arranged between the inner shell and the side wall of the outer shell, and the inner cavity is arranged in a space formed by the top and the bottom of the inner shell and the outer shell.
Furthermore, a plurality of substrate fixing frames are arranged in the inner cavity, and the substrate fixing frames are coaxially arranged.
Further, the top of shell is equipped with the detection hole, and the bottom of shell is equipped with down the detection hole, upward be equipped with the printing opacity lens on the detection hole, be equipped with down the printing opacity lens on the detection hole down, go up printing opacity lens, printing opacity lens and substrate mount coaxial setting down.
Further, the sample cavity further comprises an upper cover arranged on the shell, the upper cover is positioned at the upper detection hole, and the upper light-transmitting lens is arranged on the upper cover.
Further, a water inlet pipe and a water outlet pipe are arranged on the shell, one ends of the water inlet pipe and the water outlet pipe are respectively communicated with the outer cavity, and the other ends of the water inlet pipe and the water outlet pipe are respectively communicated with the temperature control device.
Further, be equipped with intake pipe, outlet duct and sensor connecting pipe on the inner shell, the one end of intake pipe, outlet duct and sensor connecting pipe respectively with the inner chamber intercommunication, the other end of intake pipe runs through shell and humidity loading device intercommunication, the other end of outlet duct runs through shell and outside intercommunication, the other end of sensor connecting pipe runs through shell and temperature and humidity sensor intercommunication.
Further, the humidity loading device comprises a steam generator, a gas storage device and a high-precision injection pump, wherein the gas storage device and the high-precision injection pump are respectively connected with the steam generator, and the steam generator is communicated with the air inlet pipe.
Further, the data acquisition system comprises a temperature and humidity sensor and an infrared spectrum data processing system, wherein the temperature and humidity sensor is communicated with a sensor connecting pipe, and the infrared spectrum data processing system is connected with the infrared spectrum system;
Preferably, the infrared spectrum system comprises an infrared laser generator, an optical path system, an infrared detector and a signal processing system.
In a second aspect, the present invention provides a method for detecting interfacial water by using the detection device described above, comprising the steps of:
A. Placing a base material on a substrate fixing frame in the sample cavity;
B. The temperature control device and the humidity loading device are regulated, so that the temperature and the humidity of the inner cavity reach the temperature and the humidity required by the experiment, and water molecules are deposited on the surface of the substrate to form interfacial water;
C. Opening an infrared spectrum system, and carrying out infrared spectrum detection on the interface water on the substrate material to obtain an interface water infrared spectrum chart;
D. processing the interface water infrared spectrogram through an infrared spectrum data processing system to obtain interface water detection data;
preferably, the step C further comprises returning to the step B if the interface water needs to be changed to detect the ambient humidity and the temperature;
Preferably, the humidity adjusting and loading device comprises the steps of opening a steam generator switch to heat a steam generator, then opening a gas cylinder to adjust the gas flow simultaneously, and then opening a high-precision injection pump to control the liquid flow simultaneously;
Preferably, the temperature control means comprises a thermostatic water bath apparatus.
According to the detection device for the interface water, provided by the invention, the humidity loading device and the temperature control device are introduced to ensure the stability of the environmental humidity and the temperature in the sample cavity in the experimental process. Meanwhile, the data acquisition system and the infrared spectrum system are adopted, so that automatic testing within a certain time can be realized, and dynamic detection of the interface water freezing process can be realized. The method solves the technical problems that in the prior art, the thickness of the interface water is affected by the fluctuation of humidity and temperature under the environmental condition due to the fact that the interface water is exposed to the air environment during detection, so that the accuracy of a detection result is low.
The invention also provides a detection method for the interfacial water, which can measure the infrared spectrograms of the interfacial water of different types of substrate materials changing along with the temperature and/or humidity under different temperature and/or humidity conditions, and provides an important microscopic test analysis method for researching a water-solid interface interaction mechanism.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a detection device for interfacial water according to embodiment 1 of the present invention;
FIG. 2 is a schematic view showing the overall structure of a sample chamber according to embodiment 1 of the present invention;
FIG. 3 is a schematic side view of a sample chamber according to embodiment 1 of the present invention;
FIG. 4 is a schematic cross-sectional view of the structure at A-A in FIG. 3;
FIG. 5 is a schematic cross-sectional view of the structure at B-B in FIG. 3;
FIG. 6 is a schematic top view of a sample chamber according to embodiment 1 of the present invention;
FIG. 7 is a schematic cross-sectional view of the structure at C-C in FIG. 6;
FIG. 8 is a schematic diagram of an exploded structure of a sample chamber according to embodiment 1 of the present invention;
FIG. 9 is a schematic flow chart of a method for detecting interfacial water according to embodiment 2 of the present invention;
FIG. 10 is an in situ IR spectrum of montmorillonite surface interface water at different relative humidities provided in example 2 of the present invention.
Icon: 1-a sample chamber; 11-a housing; 111-a water inlet pipe; 112-a water outlet pipe; 113-upper detection well; 114-lower detection hole; 12-an inner shell; 121-an air inlet pipe; 122-an air outlet pipe; 123-sensor connection tube; 13-an outer lumen; 14-inner cavity; 15-a substrate fixing frame; 16-an upper cover; 17-upper light transmitting lens; 18-a lower light transmitting lens; 2-a humidity loading device; 21-a gas storage device; 22-high precision syringe pump; 23-a steam generator; 3-a temperature control device; 4-a temperature and humidity sensor; a 5-infrared spectrum data processing system; 6-infrared light spectrum system.
Detailed Description
Unless defined otherwise herein, scientific and technical terms used in connection with the present application shall have the meanings commonly understood by one of ordinary skill in the art. The meaning and scope of terms should be clear, however, in the event of any potential ambiguity, the definitions provided herein take precedence over any dictionary or extraneous definition. In the present application, the use of "or" means "and/or" unless stated otherwise. Furthermore, the use of the term "include" and other forms is not limiting.
Unless otherwise indicated, the methods and techniques of the present invention are generally well known in the art and are performed according to conventional methods as described in various general and more specific references cited and discussed throughout the present specification.
In one aspect, the invention provides a detection device for interface water, which comprises a sample cavity 1, a humidity loading device 2 connected with the sample cavity 1, a temperature control device 3 connected with the sample cavity 1, a data acquisition system and an infrared spectrum system 6;
An outer cavity 13 and an inner cavity 14 are arranged in the sample cavity 1, and the outer cavity 13 is arranged around the inner cavity 14;
The humidity loading device 2 is communicated with the inner cavity 14 and is used for adjusting the humidity of the inner cavity 14 and forming interfacial water on the surface of the base material;
the temperature control device 3 is communicated with the outer cavity 13 and is used for adjusting the temperature of the inner cavity 14;
the inner cavity 14 is used for providing a detection space for interfacial water, and the inner cavity 14, the data acquisition system and the infrared spectrum system 6 are mutually matched for interfacial water detection.
The humidity loading device 2 is connected with the sample cavity 1 through a pipeline and is used for maintaining the humidity in the sample cavity 1 under a certain temperature condition so as to achieve the humidity required by an experiment; the sample cavity 1 can be made of stainless steel, and the inner cavity 14 is used for placing a substrate and forming interface water on the surface of the substrate; the temperature control device 3 is used for maintaining the temperature required by the experimental sample in the sample cavity system; the data acquisition system is used for observing the temperature and humidity changes in the sample cavity and acquiring and storing infrared spectrograms of interface water in the sample cavity under different humidity conditions; the infrared light spectrum system 6 provides the infrared light required for the test.
The humidity loading device 2 and the temperature control device 3 are introduced to ensure the stability of the environmental humidity and the temperature in the sample cavity in the experimental process, so that the purpose of measuring infrared spectrograms of the interface water changing along with the humidity at different temperatures is realized. Meanwhile, by adopting the data acquisition system and the infrared spectrum system 6, automatic testing within a certain time can be realized so as to realize dynamic detection of the interface water freezing process. Provides a detection device for researching a water-solid interface interaction mechanism, and can be used for microscopic test analysis. The method solves the technical problems that in the prior art, the thickness of the interface water is affected by the fluctuation of humidity and temperature under the environmental condition due to the fact that the interface water is exposed to the air environment during detection, so that the accuracy of a detection result is low.
In order to realize the regulation and control effect of the humidity loading device 2 and the temperature control device 3 on the temperature and humidity of the inner cavity, interface water is formed on the substrate material while the humidity is regulated.
In some specific embodiments, the sample chamber 1 further comprises an outer housing 11 and an inner housing 12 disposed inside the outer housing 11, the outer chamber 13 is disposed between the inner housing 12 and the side walls of the outer housing 11, and the inner chamber 14 is disposed in the space formed between the inner housing 12 and the top and bottom of the outer housing 11.
Through setting up inner shell 12 in shell 11, form outer chamber 13 and inner chamber 14, and outer chamber 13 surrounds around inner chamber 14, under this structure, outer chamber 13 can regulate and control the temperature of inner chamber 14 through the cooperation with temperature control device 3, and simultaneously, the top and the bottom of inner chamber 14 are the top and the bottom of shell 11, are single-layer structure, are convenient for detect the interface water in the inner chamber 14.
In order to be able to study the effect of different types of base materials on interfacial water, such as base materials of mica, clay minerals, etc.
In some specific embodiments, a plurality of substrate holders 15 are disposed in the inner cavity 14, and a plurality of the substrate holders 15 are disposed coaxially.
Different base materials can be placed on different base material fixing frames 15, so that in-situ dynamic detection of experiments of the influence of different types of base materials on interface water based on infrared spectra can be realized.
The number of the substrate holders 15 may be 1, 2, 3 or more, and in practical use, may be set according to the size of the inner cavity 14, and may be preferably 3.
In some specific embodiments, the top of the housing 11 is provided with an upper detection hole 113, the bottom of the housing 11 is provided with a lower detection hole 114, the upper detection hole 113 is provided with an upper transparent lens 17, the lower detection hole 114 is provided with a lower transparent lens 18, and the upper transparent lens 17, the lower transparent lens 18 and the substrate fixing frame 15 are coaxially arranged.
Wherein, the upper light-transmitting lens 17 and the lower light-transmitting lens 18 can be selected from lenses with infrared light transmittance more than 68% and light transmittance range of 20000-440 cm -1, and can be specifically selected from zinc selenide lenses.
To facilitate placement of the base material or replacement of the base material.
In some specific embodiments, the sample chamber 1 further comprises an upper cover 16 disposed on the housing 11, the upper cover 16 being located at the upper detection aperture 113, the upper light-transmitting lens 17 being disposed on the upper cover 16.
By disposing the upper light-transmitting lens 17 on the upper cover 16, the upper cover 16 is only required to be detached from the housing 11 when the substrate material is placed or replaced, and for convenience of use, the upper cover 16 and the housing 11 may be detachably connected, such as by bolting, and a flange cover may be selected as the specific upper cover 16.
In some specific embodiments, the casing 11 is provided with a water inlet pipe 111 and a water outlet pipe 112, one end of the water inlet pipe 111 and one end of the water outlet pipe 112 are respectively communicated with the outer cavity 13, and the other end is respectively communicated with the temperature control device 3.
The temperature control device 3 precisely controls the temperature inside the sample cavity mainly through the circulating water bath precision of +/-0.01 k so as to achieve the temperature required by detecting the sample. Water with a certain temperature is filled into the outer cavity 13 through the water inlet pipe 111, and flows out to the constant-temperature water bath device through the water outlet pipe 112 to form circulation. The temperature of the outer cavity 13 is changed and regulated by regulating the temperature of the constant-temperature water bath device, the water flow of the water inlet pipe 111 or the water flow of the water outlet pipe 112.
In some specific embodiments, the inner shell 12 is provided with an air inlet pipe 121, an air outlet pipe 122 and a sensor connecting pipe 123, one ends of the air inlet pipe 121, the air outlet pipe 122 and the sensor connecting pipe 123 are respectively communicated with the inner cavity 14, the other end of the air inlet pipe 121 penetrates through the outer shell 11 to be communicated with the humidity loading device 2, the other end of the air outlet pipe 122 penetrates through the outer shell 11 to be communicated with the outside, and the other end of the sensor connecting pipe 123 penetrates through the outer shell 11 to be communicated with the humidity sensor 4.
Steam is output through the humidity loading device 2, enters the inner cavity through the air inlet pipe 121, adjusts the humidity of the inner cavity, forms interfacial water on the base material, continuously enters the air inlet pipe 121, and is discharged from the air outlet pipe 122 to maintain the humidity in the sample cavity. The humidity of the inner chamber can be changed by adjusting the air flow of the air inlet pipe 121.
In some specific embodiments, the humidity loading device 2 includes a steam generator 23, a gas storage device 21 and a high-precision injection pump 22 respectively connected to the steam generator 23, and the steam generator 23 is in communication with the air inlet pipe 121.
The steam generator 23 is communicated with the air inlet pipe 121 through a pipeline, the air storage device 21 and the high-precision injection pump 22 respectively inject nitrogen and water into the steam generator 23, and then the mixed steam of nitrogen and steam is injected into the inner cavity 14 after being processed by the steam generator 23 so as to achieve the humidity required by experiments. The gas storage means 21 is in particular a gas cylinder.
In some specific embodiments, the data acquisition system comprises a temperature and humidity sensor 4 and an infrared spectrum data processing system 5, the temperature and humidity sensor 4 is communicated with a sensor connecting pipe 123, and the infrared spectrum data processing system 5 is connected with an infrared spectrum system 6;
Preferably, the infrared spectrum system 6 includes an infrared laser generator, an optical path system, an infrared detector, and a signal processing system.
The infrared spectrum data processing system 5 is used for collecting infrared spectrograms of interface water in the sample cavity under different humidity conditions. The temperature and humidity sensor 4 is used for recording the temperature and humidity inside the sample cavity (the temperature is accurate to 0.01, the humidity is accurate to 0.1), and the gas flow of the air inlet pipe 121 and the liquid flow of the water outlet pipe 112 and the water inlet pipe 111 are adjusted according to the indication of the temperature and humidity sensor 4, so that the temperature and humidity inside the sample cavity can reach the temperature and humidity required by the experiment.
An infrared laser generator in the infrared spectrum system 6 emits infrared light, the infrared light passes through an optical path system, the infrared light is absorbed by an infrared detector after passing through a sample, and a signal processing system processes infrared light signals absorbed by the detector.
The invention also provides a detection method of interface water by using the detection device, which comprises the following steps:
A. Placing the base material on a substrate holder 15 inside the sample chamber 1;
B. adjusting the temperature control device and the humidity loading device to enable the temperature and the humidity of the inner cavity 14 to reach the temperature and the humidity required by the experiment, and enabling water molecules to deposit on the surface of the substrate to form interface water;
C. opening an infrared spectrum system 6, and carrying out infrared spectrum detection on the interface water on the substrate material to obtain an interface water infrared spectrum chart;
D. processing the interface water infrared spectrogram through an infrared spectrum data processing system 5 to obtain interface water detection data;
Preferably, the step C further comprises returning to the step B if the interface water needs to be changed to detect the ambient humidity and the temperature;
Preferably, the humidity loading device is regulated by opening a switch of the steam generator to heat the steam generator, then opening a gas cylinder to regulate the gas flow rate at the same time, and then opening a high-precision injection pump to control the liquid flow rate at the same time;
preferably, the temperature control means comprises a thermostatic water bath means.
Before detection, the tightness of the experimental gas cylinder, the pipeline, the valve and the steam generator is also required to be checked, so that the whole experimental system is airtight and airtight.
The testing method can measure infrared spectrograms of the interface water of different types of substrate materials changing along with the temperature and/or humidity under different temperature and/or humidity conditions, and provides an important microscopic testing analysis method for researching a water-solid interface interaction mechanism.
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The materials in the examples were prepared according to the existing methods or were directly commercially available unless otherwise specified.
Example 1
1-8, A detection device for interfacial water comprises a sample cavity 1, a humidity loading device 2 connected with the sample cavity 1, a temperature control device 3 connected with the sample cavity 1, a data acquisition system and an infrared spectrum system 6;
The sample chamber 1 includes an outer housing 11 and an inner housing 12 provided inside the outer housing 11, an outer chamber 13 is provided between the inner housing 12 and the side walls of the outer housing 11, and an inner chamber 14 is provided in a space formed by the top and bottom of the inner housing 12 and the outer housing 11. An outer cavity 13 and an inner cavity 14 are arranged in the sample cavity 1, and the outer cavity 13 is arranged around the inner cavity 14;
Wherein, the top of shell 11 is equipped with detection hole 113, and upper cover 16 is located the detection hole 113 department, and the bottom of shell 11 is equipped with down detection hole 114, sets up zinc selenide lens on the upper cover 16 and is last printing opacity lens 17, sets up zinc selenide lens on the detection hole 114 down and is printing opacity lens 18 down, and last printing opacity lens 17, printing opacity lens 18 down and substrate mount 15 coaxial setting.
The shell 11 is provided with a water inlet pipe 111 and a water outlet pipe 112, one end of the water inlet pipe 111 and one end of the water outlet pipe 112 are respectively communicated with the outer cavity 13, and the other end of the water inlet pipe 111 and the water outlet pipe 112 are respectively communicated with the temperature control device 3. The temperature control device 3 is a constant temperature water bath device.
The inner shell 12 is provided with an air inlet pipe 121, an air outlet pipe 122 and a sensor connecting pipe 123, one ends of the air inlet pipe 121, the air outlet pipe 122 and the sensor connecting pipe 123 are respectively communicated with the inner cavity 14, the other end of the air inlet pipe 121 penetrates through the outer shell 11 to be communicated with the humidity loading device 2, the other end of the air outlet pipe 122 penetrates through the outer shell 11 to be communicated with the outside, and the other end of the sensor connecting pipe 123 penetrates through the outer shell 11 to be communicated with the temperature and humidity sensor 4.
The humidity loading device 2 comprises a steam generator 23, a gas storage device 21 and a high-precision injection pump 22 which are respectively connected with the steam generator 23, and the steam generator 23 is communicated with an air inlet pipe 121.
The temperature control device 3 is communicated with the outer cavity 13 and is used for adjusting the temperature of the inner cavity 14;
Three substrate holders 15 are arranged in the inner cavity 14, and the three substrate holders 15 are arranged coaxially.
The data acquisition system comprises a temperature and humidity sensor 4 and an infrared spectrum data processing system 5, wherein the temperature and humidity sensor 4 is communicated with a sensor connecting pipe 123, and the infrared spectrum data processing system 5 is connected with an infrared spectrum system 6. The infrared spectrum system 6 includes an infrared laser generator, an optical path system, an infrared detector, and a signal processing system.
Example 2
Referring to fig. 9, in this embodiment, montmorillonite is taken as an example, and the detection device provided in embodiment 1 is used to measure an in-situ infrared spectrogram of interface water of a montmorillonite system.
Firstly, preparing 10g of 1wt% montmorillonite solution, and carrying out ultrasonic treatment for 5min to uniformly disperse montmorillonite in the solution, then, using a pipetting gun to drop two drops of montmorillonite solution on sapphire glass for natural airing, wherein the diameter of the sapphire glass is 13mm and the thickness of the sapphire glass is 0.2mm, and forming a montmorillonite sheet with the diameter of 13mm and the thickness of 5 mu m as a substrate material.
The base material is placed on the substrate holder 15.
And then adjusting the temperature of the water bath to 20 ℃, adjusting the gas flowmeter and the liquid flowmeter after the temperature is stable, observing the readings of the temperature and humidity sensor, adjusting the relative humidity in the sample cavity to 27.8% (the gas flow is 20ml/min, and the liquid flow is 0 mu l/min), and depositing water molecules on the surface of the substrate to form interfacial water.
The position of the sample cavity is adjusted to ensure that infrared light can penetrate through the substrate in the sample cavity and be received by the detector.
Setting sampling parameters of each physical quantity of the test part on a remote control computer, starting an infrared spectrometer, clicking to perform infrared spectrum test, and storing an in-situ infrared spectrum of montmorillonite surface interface water under the relative humidity of 27.8%.
And respectively changing the relative humidity of 38.8% (the gas flow rate of 20ml/min and the liquid flow rate of 0.3 mu l/min), 48.8% (the gas flow rate of 40ml/min and the liquid flow rate of 0.5 mu l/min), 58.8% (the gas flow rate of 30ml/min and the liquid flow rate of 0.5 mu l/min), 78.8% (the gas flow rate of 10ml/min and the liquid flow rate of 0.5 mu l/min), 98.8% (the gas flow rate of 220ml/min and the liquid flow rate of 30 mu l/min), and measuring the in-situ infrared spectrogram of the montmorillonite surface interface water under different relative humidity.
And after the experimental test is finished, turning off the laser source, saving sampling parameters of each part in the experimental test process, and analyzing the influence of the substrate material on interface water by processing an infrared spectrogram through data processing software. The specific results are shown in FIG. 10.
Wherein 3400cm -1 is the hydroxyl vibration peak of pure water. It is known that under a high humidity environment (the relative humidity is 78.8% or more), the interface water deposited on the montmorillonite sheet is thicker, and the influence of montmorillonite on the interface water is difficult to measure, so that the hydroxyl wave number peak position of the interface water obtained by measurement is consistent with that of pure water; in a medium humidity environment (the relative humidity is 58.8% and 48.8%), the interfacial water deposited on the montmorillonite sheet layer keeps a thin interfacial water molecule layer, the hydroxyl wave number peak position of the interfacial water is 3377cm -1, the hydroxyl wave number peak position is low in deviation, which indicates that the hydrogen bond vibration frequency of the interfacial water is weakened, and the hydrogen bond is enhanced, because the interfacial water is attracted to the montmorillonite surface, the hydrogen bond vibration frequency of the interfacial water is weakened due to the fact that the interfacial water is limited on the montmorillonite surface; in a low humidity environment (relative humidity of 38.8% and below), the hydroxyl wave number peak position of the interfacial water is 3374cm -1, and the hydroxyl wave number peak position of the interfacial water is lower shifted, which means that the interfacial water molecule layer deposited on the montmorillonite sheet is thinner and is more influenced by the surface of the montmorillonite.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. The detection device for the interface water is characterized by comprising a sample cavity (1), a humidity loading device (2) connected with the sample cavity (1), a temperature control device (3) connected with the sample cavity (1), a data acquisition system and an infrared spectrum system (6);
An outer cavity (13) and an inner cavity (14) are arranged in the sample cavity (1), and the outer cavity (13) is arranged around the inner cavity (14);
The humidity loading device (2) is communicated with the inner cavity (14) and is used for adjusting the humidity of the inner cavity (14) and forming interfacial water on the surface of the substrate material;
the temperature control device (3) is communicated with the outer cavity (13) and is used for adjusting the temperature of the inner cavity (14);
The inner cavity (14) is used for providing a detection space for interfacial water, and the inner cavity (14), the data acquisition system and the infrared spectrum system (6) are mutually matched for interfacial water detection.
2. The detection device according to claim 1, wherein the sample chamber (1) further comprises an outer housing (11) and an inner housing (12) provided inside the outer housing (11), the outer chamber (13) being provided between the inner housing (12) and a side wall of the outer housing (11), the inner chamber (14) being provided in a space formed by the inner housing (12) and a top and a bottom of the outer housing (11).
3. The detection device according to claim 2, wherein a plurality of substrate holders (15) are arranged in the inner cavity (14), and a plurality of the substrate holders (15) are arranged coaxially.
4. A detection device according to claim 3, characterized in that the top of the housing (11) is provided with an upper detection hole (113), the bottom of the housing (11) is provided with a lower detection hole (114), the upper detection hole (113) is provided with an upper transparent lens (17), the lower detection hole (114) is provided with a lower transparent lens (18), and the upper transparent lens (17), the lower transparent lens (18) and the substrate fixing frame (15) are coaxially arranged.
5. The detection device according to claim 4, wherein the sample chamber (1) further comprises an upper cover (16) provided on the housing (11), the upper cover (16) being located at the upper detection aperture (113), the upper light-transmitting lens (17) being provided on the upper cover (16).
6. The detection device according to claim 2, wherein the housing (11) is provided with a water inlet pipe (111) and a water outlet pipe (112), one end of the water inlet pipe (111) and one end of the water outlet pipe (112) are respectively communicated with the outer cavity (13), and the other end of the water inlet pipe and the other end of the water outlet pipe are respectively communicated with the temperature control device (3).
7. The detection device according to claim 2, wherein the inner shell (12) is provided with an air inlet pipe (121), an air outlet pipe (122) and a sensor connecting pipe (123), one ends of the air inlet pipe (121), the air outlet pipe (122) and the sensor connecting pipe (123) are respectively communicated with the inner cavity (14), the other end of the air inlet pipe (121) penetrates through the outer shell (11) to be communicated with the humidity loading device (2), the other end of the air outlet pipe (122) penetrates through the outer shell (11) to be communicated with the outside, and the other end of the sensor connecting pipe (123) penetrates through the outer shell (11) to be communicated with the temperature and humidity sensor (4).
8. The detection device according to claim 7, characterized in that the humidity loading device (2) comprises a steam generator (23), a gas storage device (21) and a high-precision injection pump (22) which are respectively connected with the steam generator (23), wherein the steam generator (23) is communicated with the gas inlet pipe (121).
9. The detection device according to claim 2, wherein the data acquisition system comprises a temperature and humidity sensor (4) and an infrared spectrum data processing system (5), the temperature and humidity sensor (4) is communicated with a sensor connecting pipe (123), and the infrared spectrum data processing system (5) is connected with an infrared spectrum system (6);
preferably, the infrared spectrum system (6) comprises an infrared laser generator, an optical path system, an infrared detector and a signal processing system.
10. The detection method for interfacial water by using the detection device according to any one of claims 1-9, comprising the steps of:
A. Placing a base material on a substrate fixing frame (15) in the sample cavity (1);
B. The temperature control device and the humidity loading device are regulated, so that the temperature and the humidity of the inner cavity (14) reach the temperature and the humidity required by the experiment, and water molecules are deposited on the surface of the substrate to form interfacial water;
C. Opening an infrared spectrum system (6), and carrying out infrared spectrum detection on the interface water on the substrate material to obtain an interface water infrared spectrum diagram;
D. Processing the interface water infrared spectrogram through an infrared spectrum data processing system (5) to obtain interface water detection data;
preferably, the step C further comprises returning to the step B if the interface water needs to be changed to detect the ambient humidity and the temperature;
Preferably, the humidity adjusting and loading device comprises the steps of opening a steam generator switch to heat a steam generator, then opening a gas cylinder to adjust the gas flow simultaneously, and then opening a high-precision injection pump to control the liquid flow simultaneously;
Preferably, the temperature control means comprises a thermostatic water bath apparatus.
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