Multi-channel surface performance analysis device and application thereof

Abstract

The invention provides a multi-channel surface performance analysis device and application thereof, the device comprises a probe molecule sample introduction unit, a flow path control unit, a detection unit and a data acquisition and processing unit, the probe molecule sample introduction unit comprises a gas and liquid sample introduction assembly; the flow path control unit comprises a three-way valve, at least one reference column and a multi-channel test column; the detection unit comprises a first detector and a second detector, the first detector is connected with the output end of the reference column, and the second detector is connected with the output end of the multi-channel test column; and the data acquisition and processing unit is used for acquiring, analyzing and processing detection data of the first detector and the second detector. The device is easy, convenient and efficient to operate, various performance parameters of the surfaces of different types of solid materials are measured, the interaction force between the surfaces of the solid materials and different probe molecules is analyzed, the use flexibility of the device is improved, and the use range of the device is widened.

Description

Technical Field

[0001] The invention belongs to the field of solid material surface performance processing, and in particular relates to a multi-channel surface performance analysis device and an application thereof. Background Art

[0002] The determination of thermodynamic and physicochemical properties of solid materials is a key factor in understanding the surface properties of materials and evaluating whether they can be successfully applied in industry. For example, homopolymers and block copolymers, hyperbranched and dendritic structures, cellulose, fillers and pigments, fragrances, varnishes and adhesives, inorganic substances such as minerals, food, packaging materials, coatings, drugs and surfactants, nanoparticles and nanosheets, building materials, cosmetics, natural and synthetic fibers, supported catalysts and porous materials all require evaluation and characterization of the surface of solid materials. Usually, in the process of evaluating the surface properties of solid materials, scanning electron microscopy, X-ray energy spectrum and other technologies are used to measure the surface properties of the solid material itself, such as specific surface area and pore volume. However, these methods cannot reflect the ability of the solid material surface to interact with the probe it acts on, nor can they measure various performance parameters of the surfaces of different types of solid materials, such as measuring the interaction parameters between polymers and between polymers and solvents, calculating the surface thermodynamic parameters of solids, studying the relationship between surface thermodynamic parameters and surface composition and morphology, characterizing the effect of surface modification on the composition and morphology of polymer composites, measuring the crystallinity and crystallization kinetics curve of crystalline polymers, the diffusion coefficient and diffusion activation energy of low molecular weight solvents in polymers, and the compatibility of polymers. All of the above parameters are important physical and chemical properties for material characterization.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Summary of the invention

[0005] In view of the shortcomings of the prior art described above, an object of the present invention is to provide a multi-channel surface performance analysis device and its application, so as to solve the problem that the prior art cannot measure various performance parameters of the surfaces of different types of solid materials, and the problem that the prior art cannot reflect the interaction between the surface of the solid material and the probe it acts on.

[0006] To achieve the above-mentioned and other related purposes, the present invention provides a multi-channel surface performance analysis device, the analysis device comprising:

[0007] A probe molecule injection unit, the probe molecule injection unit comprising a gas injection component and a liquid injection component, the gas injection component is used to inject gas probe molecules, and the liquid injection component is used to inject liquid probe molecules;

[0008] A flow control unit, the flow control unit comprising a three-way valve, at least one reference column and a multi-channel test column, the outlet of the probe molecule injection unit is connected to the inlet of the three-way valve, one outlet of the three-way valve is connected to the multi-channel test column through a first pipeline, and is used to inject the probe molecule into the multi-channel test column; the other outlet of the three-way valve is connected to the reference column through a second pipeline, and is used to inject the probe molecule into the reference column;

[0009] A detection unit, the detection unit comprising a first detector and a second detector, the first detector being connected to the output end of the reference column and used for identifying and responding to the sample separated from the reference column, and the second detector being connected to the output end of the multi-channel test column and used for identifying and responding to the sample separated from the multi-channel test column;

[0010] A data acquisition and processing unit, wherein the signal input end of the data acquisition and processing unit is connected to the first detector and the second detector respectively, and is used to acquire the detection data of the first detector and the second detector and analyze and process them.

[0011] Preferably, the probe molecule injection unit also includes a carrier gas unit, which is respectively connected to the gas injection assembly and the liquid injection assembly for providing carrier gas. A flow control system is provided in the carrier gas unit, and the flow control system is used to control the flow of the carrier gas, wherein the flow control system is one of an electronic pressure control system, an automatic flow control system, an electronic flow control system, and a programmed pressure control system.

[0012] Preferably, the multi-channel test column comprises a plurality of sample columns, each of which is filled with the same or different samples to be tested.

[0013] Preferably, a first switching valve is also provided on the first pipeline, and a sample outlet valve of the first switching valve is correspondingly connected to the input end of each sample column, and the first switching valve diverts the probe molecules to each sample column; the output end of each sample column is connected to the second detector through a second switching valve, and a sample injection valve of the second switching valve is correspondingly connected to the output end of each sample column, and a sample outlet valve of the second switching valve is connected to the second detector, and the second switching valve switches the probe molecules separated from the sample column into the second detector for detection.

[0014] Preferably, when multiple reference columns are provided, a third switching valve is also provided on the second pipeline, and the sample outlet valve of the third switching valve is correspondingly connected to the input end of each reference column, and the third switching valve diverts the probe molecules to each reference column; the output end of each reference column is connected to the first detector through a fourth switching valve, and the sample injection valve of the fourth switching valve is correspondingly connected to the output end of each reference column, and the sample outlet valve of the fourth switching valve is connected to the first detector through a pipeline.

[0015] Preferably, the inner diameter of the sample column is 1 mm to 30 mm, and the length of the sample column is 5 cm to 50 cm.

[0016] Preferably, the number of the sample columns is 1 to 10, the number of the reference columns is 1 to 10, and the number of the reference columns does not exceed the number of the sample columns.

[0017] Preferably, the number of passage valves of the first switching valve and the second switching valve is not less than the number of the sample columns; the number of passage valves of the third switching valve and the fourth switching valve is not less than the number of the reference columns.

[0018] Preferably, the first detector comprises a FID detector or a TCD detector; and the second detector comprises a FID detector or a TCD detector.

[0019] The present invention also provides an application of a multi-channel surface performance analysis device, wherein the multi-channel surface performance analysis device is used to evaluate the surface performance of solid materials.

[0020] As described above, the multi-channel surface performance analysis device and its application of the present invention have the following beneficial effects:

[0021] The multi-channel surface performance analysis device in the present invention is simple and convenient to operate, and integrates a probe molecule injection unit, a flow control unit, a detection unit and a data acquisition and processing unit. The probe molecule injection unit realizes the injection of gas probe molecules and liquid probe molecules. The range of probe molecules is wide. The flow control unit includes a three-way valve, a reference column and a multi-channel test column. The use of a multi-channel test column can be used to test a variety of different solid materials, which greatly improves the test efficiency. The probe molecules pass through the three-way valve, enter the reference column, and then enter the first detector for detection. They pass through the first switching valve and flow into each sample column filled with different solid materials to be tested, and then enter the second detector for detection. The parameters required for testing are obtained by collecting, processing and analyzing the detection data, which is simple and efficient.

[0022] The device of the present invention can realize comprehensive testing of thermodynamic properties and physical and chemical properties of surfaces of different types of solid materials, and can analyze the interaction forces between surfaces of different solid materials to be tested and different probe molecules, which greatly increases the flexibility and scope of use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic structural diagram of a multi-channel surface performance analysis device in one example of the present invention.

[0024] Figure 2 Shown is a schematic structural diagram of a multi-channel surface performance analysis device in other examples of the present invention.

[0025] Description of Figure Numbers

[0026] 100 Column Oven

[0027] 101 Three-way valve

[0028] 102 Reference column

[0029] 1021 Second pipeline

[0030] 1022 Third switching valve

[0031] 1023 Fourth switching valve

[0032] 103 Sample column

[0033] 1031 First pipeline

[0034] 104 First switching valve

[0035] 1041 First branch pipeline

[0036] 105 Second switching valve

[0037] 1051 Second branch pipeline

[0038] 106 Sample outlet pipeline

[0039] 201 Gas Inlet Assembly

[0040] 202 Liquid Injection Assembly

[0041] 203 Carrier gas unit

[0042] 301 First Detector

[0043] 302 Second Detector

[0044] 400 Data Acquisition Processing Unit DETAILED DESCRIPTION

[0045] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0046] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. For example, when describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional view showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0047] For ease of description, spatially relative terms such as "under", "below", "below", "below", "above", "on", etc. may be used herein to describe the relationship of one element or feature shown in the drawings to other elements or features. It will be understood that these spatially relative terms are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the drawings. In addition, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.

[0048] In the context of the present application, a structure in which a first feature is described as being "above" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0049] It should be noted that the diagrams provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, and the diagrams only show the components related to the present invention rather than the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed arbitrarily, and the layout of the components may also be more complicated. In order to make the diagrams as concise as possible, not all structures are marked in the drawings.

[0050] like Figure 1 , 2As shown, the present invention provides a multi-channel surface performance analysis device, which includes: a probe molecule injection unit, a flow control unit, a detection unit and a data acquisition processing unit 400, wherein the probe molecule injection unit includes a gas injection component 201 and a liquid injection component 202, the gas injection component 201 is used to inject gas probe molecules, and the liquid injection component 202 is used to inject liquid probe molecules; the flow control unit includes a three-way valve 101, at least one reference column 102 and a multi-channel test column, the outlet of the probe molecule injection unit is connected to the inlet of the three-way valve 101, and one outlet of the three-way valve 101 is connected to the multi-channel test column through a first pipeline 1031, which is used to inject the probe molecules into the multi-channel test column. The other outlet of the three-way valve 101 is connected to the reference column 102 through the second pipeline 1021, and is used to inject the probe molecule into the reference column 102; the detection unit includes a first detector 301 and a second detector 302, the first detector 301 is connected to the output end of the reference column 102, and is used to identify and respond to the sample separated from the reference column 102, and the second detector 302 is connected to the output end of the multi-channel test column, and is used to identify and respond to the sample separated from the multi-channel test column; the signal input end of the data acquisition and processing unit 400 is respectively connected to the first detector 301 and the second detector 302, and is used to collect the detection data of the first detector 301 and the second detector 302 and analyze and process them.

[0051] Specifically, the probe molecule injection unit includes the injection of gas probe molecules and the injection of liquid probe molecules. The gas injection component 201 includes a gas injection valve, and the gas probe molecules are directly injected through the gas injection valve; the liquid injection component 202 includes a liquid injection device for injecting liquid probe molecules. Preferably, the liquid injection device can use a head space injector, a multi-position automatic injector to control the injection, or vaporize the liquid probe molecules before injection. The liquid injection devices used for injecting liquid probe molecules are all methods well known to those skilled in the art, and will not be described in detail here, as long as they can meet actual use requirements. The gas injection component 201 and the liquid injection component 202 are provided in the present invention, which greatly expands the scope of the probe molecules. In a specific embodiment of the present invention, the probe molecules may include organic substances that can be vaporized within 300°C.

[0052] In addition, the flow control unit is arranged in the column box 100, the probe molecule injection unit, the detection unit and the data acquisition and processing unit 400 are all arranged outside the column box 100, and the column box 100 is provided with a temperature control system (not shown in the figure), which is used to control the column temperature of the multi-channel test column and the reference column 102 in the column box 100, and preferably, the accuracy of the temperature control system reaches 0.1°C, but the specific structure of the temperature control system is not excessively restricted here.

[0053] As an example, the probe molecule injection unit also includes a carrier gas unit 203, which is respectively connected to the gas injection component 201 and the liquid injection component 202 for providing a carrier gas. A flow control system (not shown in the figure) is provided in the carrier gas unit 203, and the flow control system is used to control the flow of the carrier gas, wherein the flow control system is one of an electronic pressure control system, an automatic flow control system, an electronic flow control system, and a programmed pressure control system.

[0054] Specifically, the purpose of introducing the carrier gas is mainly to carry the probe molecules through various pipelines, the reference column 102, the multi-channel test column, and finally flow into the detection unit; regarding the specific structure of the carrier gas unit 203, there is no excessive restriction here, as long as it can meet actual usage requirements.

[0055] As an example, the multi-channel test column includes a plurality of sample columns 103 , each sample column 103 is filled with the same or different samples to be tested.

[0056] Specifically, when the device of the present invention is used to test the surface properties of solid materials, each sample column 103 is filled with the solid material to be tested, and the filler in the reference column 102 is selected according to the properties of the solid material to be tested, and the filler that has no force on the probe molecule is selected to fill the reference column 102; preferably, the filler in the reference column 102 is glass beads, and the particle size of the glass beads is consistent with the particle size of the sample to be tested filled in the sample column 103.

[0057] As an example, a first switching valve 104 is also provided on the first pipeline 1031, and the sample outlet valve of the first switching valve 104 is correspondingly connected to the input end of each sample column 103, and the first switching valve 104 diverts the probe molecules to each sample column 103; the output end of each sample column 103 is connected to the second detector 302 through the second switching valve 105, and the sample injection valve of the second switching valve 105 is correspondingly connected to the output end of each sample column 103, and the sample outlet valve of the second switching valve 105 is connected to the second detector 302, and the second switching valve 105 is used to switch the probe molecules separated from the sample column 103 into the second detector 302 for detection.

[0058] For details, see Figure 1The injection valve of the first switching valve 104 is connected to the first pipeline 1031, and the sample outlet valve of the first switching valve 104 is correspondingly connected to the input end of each sample column 103 through each first branch pipeline 1041, and the probe molecules are diverted through each first branch pipeline 1041; the output end of each sample column 103 is respectively connected to the injection valve of the second switching valve 105 through each second branch pipeline 1051, and the sample outlet valve of the second switching valve 105 is connected to the second detector 302 through the sample outlet pipeline 106; the first detector 301 detects the probe molecules separated from the reference column 102, and the second detector 302 detects the probe molecules separated from the sample column 103. The two detection systems detect simultaneously, and the relative retention time of the probe molecules passing through the fillers in the reference column 102 and the sample column 103 is determined by examining the different peak times of the probe molecules on the two detection systems.

[0059] As an example, when multiple reference columns 102 are provided (greater than or equal to 2), a third switching valve 1022 is provided on the second pipeline 1021, and the sample outlet valve of the third switching valve 1022 is correspondingly connected to the input end of each reference column 102, and the third switching valve 1022 diverts the probe molecules to each reference column 102; the output end of each reference column 102 is connected to the first detector 301 through the fourth switching valve 1023, and the sample injection valve of the fourth switching valve 1023 is correspondingly connected to the output end of each reference column 102, and the sample outlet valve of the fourth switching valve 1023 is connected to the first detector 301 through the pipeline.

[0060] For details, see Figure 2 When 7 reference columns 102 are provided, the input ends of the multiple reference columns 102 are connected through the third switching valve 1022, and the output ends are connected through the fourth switching valve 1023. The interaction force between the surfaces of different solid materials to be tested and different probe molecules is now analyzed. In a specific embodiment of the present invention, metal sealing gaskets are provided on the three-way valve 101, the first switching valve 104, the second switching valve 105, the third switching valve 1022, and the fourth switching valve 1023 to prevent air leakage and loosening, and to keep the pipelines connected to each valve body unobstructed and not to gather and cause blockage. The provision of the metal sealing gasket enables the device of the present invention to still operate well at a temperature as high as 300°C; in addition, the three-way valve 101, the first switching valve 104, the second switching valve 105, the third switching valve 1022, and the fourth switching valve 1023 can also adopt a microplate flow control system, and the surface is deactivated to completely form an inert sample flow path to ensure that no gas reflux occurs.

[0061] As an example, the inner diameter of the sample column 103 is 1 mm to 30 mm, and the length of the sample column 103 is 5 cm to 50 cm.

[0062] Specifically, the inner diameter of the sample column 103 may include a value within any range such as 1mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, etc., which can be adjusted according to actual conditions; the length of the sample column 103 may include a value within any range such as 5cm, 10cm, 20cm, 30cm, 40cm, 50cm, etc., which can be adjusted according to actual conditions.

[0063] As an example, 1 to 10 sample columns 103 are provided, and 1 to 10 reference columns 102 are provided, and the number of reference columns 102 does not exceed the number of sample columns 103 .

[0064] Specifically, the number of sample columns 103 can be set to any value within a range of 1, 3, 5, 7, 9, 10, etc., and the number of reference columns 102 can be set to 1, 3, 5, 7, 9, 10, and can be adjusted based on actual conditions.

[0065] As an example, the number of passage valves of the first switching valve 104 and the second switching valve 105 is not less than the number of sample columns 103 ; the number of passage valves of the third switching valve 1022 and the fourth switching valve 1023 is not less than the number of reference columns 102 .

[0066] For details, see Figure 1 , the number of sample columns 103 is 7, the number of passage valves of the first switching valve 104 and the second switching valve 105 are both 8, and of course, it can be more than 8; see Figure 2 The number of reference columns 102 is 7, and the number of passage valves of the third switching valve 1022 and the fourth switching valve 1023 are both 8, which can of course be more than 8.

[0067] As an example, the first detector 301 includes a FID detector or a TCD detector; the second detector 302 includes a FID detector or a TCD detector.

[0068] Specifically, the first detector 301 and the second detector 302 can be both FID detectors and TCD detectors. When the FID detector is used, the carrier gas introduced into the carrier unit 203 is nitrogen; when the TCD detector is used, the carrier gas introduced into the carrier unit 203 is hydrogen or helium.

[0069] The present invention also provides an application of a multi-channel surface performance analysis device, using Figure 1 The multi-channel surface property analysis device shown is used to evaluate the surface properties of solid materials.

[0070] Specifically, use Figure 1 The method for evaluating the surface properties of solid materials by the multi-channel surface property analysis device shown comprises the following steps:

[0071] S1. The solid material to be tested is used as the stationary phase and pre-loaded into each sample column 103, and the reference column 102 is also correspondingly loaded with a filler that has no force on the probe molecule;

[0072] S2, injecting the probe molecule through the probe molecule injection unit, and at the same time using the carrier gas unit 203 to introduce the carrier gas, the carrier gas carrying a part of the probe molecules flows through the inlet of the three-way valve 101, the outlet of the three-way valve 101, and the first pipeline 1031 in sequence, and then is divided into each sample column 103 through the first switching valve 104 and the first branch pipeline 1041; the carrier gas carrying a part of the probe molecules flows through the inlet of the three-way valve 101, the outlet of the three-way valve 101, and the second pipeline 1021 in sequence, and then enters the reference column 102, the sample separated from the reference column 102 enters the first detector 301, and the sample separated from the sample column 103 enters the second detector 302;

[0073] S3. The data acquisition and processing unit 400 collects the detection data of the first detector 301 and the second detector 302, and analyzes and processes the data. By observing the different peak times of the probe molecules on the first detector 301 and the second detector 302, the relative retention time of the probe molecules through the reference column 102 and the sample column 103 is determined. Combined with basic quantities such as the mass of the solid material to be tested, the pressure at the inlet and outlet of the carrier gas, the flow rate of the carrier gas, and the temperature of the sample column 103, the interaction between the probe molecules and the solid material to be tested and the surface properties of the solid material to be tested are obtained through simulation calculation.

[0074] Specifically, the above-mentioned multi-channel surface performance analysis device can realize the comprehensive test of the thermodynamic properties and physicochemical properties of the surface of solid materials. The test parameters include surface properties (surface adsorption enthalpy, surface acidity and alkalinity, surface compatibility), interaction parameters, solubility parameters, contact energy parameters, molar adsorption heat, molar mixing heat, etc.; the solid materials to be tested have a wide range of applicability, including homopolymers and block copolymers, hyperbranched and dendritic structures, cellulose, fillers and pigments, fragrances, varnishes and adhesives, minerals and other inorganic substances, food, packaging materials, coatings, drugs and surfactants, nanoparticles and nanosheets, building materials, cosmetics, natural and synthetic fibers, films, supported catalysts and porous materials, etc.

[0075] In order to better understand the multi-channel surface performance analysis device and its application in the present invention, the present invention is described below with reference to specific embodiments. It should be noted that these embodiments are merely descriptive and do not limit the present invention in any way.

[0076] Example 1

[0077] This embodiment provides an application of a multi-channel surface performance analysis device. The multi-channel surface performance analysis device is used to study the surface free energy of the sample to be measured by measuring the retention volume of probe molecules on the surface of the sample to be measured at different temperatures.

[0078] First, see Figure 1 , a multi-channel surface performance analysis device is provided, the analysis device includes: a probe molecule injection unit, a flow control unit, a detection unit and a data acquisition processing unit 400; wherein the probe molecule injection unit includes a liquid injection component 202 and a carrier gas unit 203, the liquid injection component 202 is used to inject liquid probe molecules (acetone is used as the probe molecule), and the carrier gas unit 203 is used to provide nitrogen, and the flow rate of nitrogen is 25mL / min; the flow control unit is arranged in a column box 100, and the column box 100 is provided with The temperature control system is provided, and the flow control unit includes a three-way valve 101, a reference column 102 and a multi-channel test column. The injection port temperature of the liquid injection component 202 is 250°C, the injection port split ratio is 25:1, and the injection volume is 0.1 μL. The outlet of the liquid injection component 202 is connected to the inlet of the three-way valve 101, and the outlet of the three-way valve 101 is connected to the multi-channel test column through a first pipeline 1031, which is used to inject the probe molecule into the multi-channel test column; the outlet of the three-way valve 101 is connected to the reference column through a second pipeline 1021. 102 is connected, and is used to inject the probe molecule into the reference column 102, wherein the multi-channel test column includes a plurality of sample columns 103, the inner diameter of the sample column 103 is 4 mm, the outer diameter is 8 mm, and the length is 12 cm, and each sample column 103 is filled with 35 mg of sample A; the reference column 102 is filled with glass beads of the same particle size and volume as sample A; the detection unit includes a first detector 301 and a second detector 302, the first detector 301 is connected to the output end of the reference column 102, and is used to identify and respond to the sample separated from the reference column 102, the second detector 302 is connected to the output end of each sample column 103, and is used to identify and respond to the sample separated from the sample column 103, and the first detector 301 and the second detector 302 are both FID detectors, and the temperature is 250°C; the signal input end of the data acquisition and processing unit 400 is respectively connected to the first detector 301 and the second detector 302, and is used to collect the detection data of the first detector 301 and the second detector 302 and analyze and process them.

[0079] Secondly, the calculation method of the adsorption free energy △G of the solid material to the probe molecule is as follows:

[0080] ΔG=-RTInVg+K,

[0081] Where ΔG is the standard adsorption free energy (J / mol); R is the universal gas constant 8.3145 J / (mol·K); T is the absolute temperature (K); the K value is related to the amount, surface area and adsorption state of the polymer, so K is a constant (J / mol) in the same chromatographic column.

[0082] The specific retention volume Vg can be obtained by the following formula:

[0083]

[0084] Where tr and t0 are the retention time and dead time (s) of the probe molecule, respectively, from which Δt is calculated; F is the carrier gas flow rate at the outlet of the chromatographic column (mL / s); m is the mass of the stationary phase (g); T is the ambient temperature (K); Pi and Po are the pressures at the inlet and outlet of the chromatographic column, respectively (Pa); and Vg is the specific retention volume (mL / g).

[0085] After investigating the adsorption performance of sample A to acetone, it was found that the adsorption free energy of sample A was -25.4 kJ / mol, which indicated that sample A had certain adsorption performance to acetone.

[0086] Example 2

[0087] This embodiment provides an application of a multi-channel surface performance analysis device. The multi-channel surface performance analysis device is used to measure the retention volume of each probe molecule on the surface of the sample A to be tested at different temperatures, thereby obtaining the adsorption free energy of the sample A on the probe molecules and further calculating the adsorption enthalpy.

[0088] The multi-channel surface performance analysis device used in this embodiment is the same as that in Embodiment 1 and will not be described in detail here.

[0089] The calculation method of adsorption enthalpy of solid material surface to different probes is as follows:

[0090] According to the thermodynamic formula ΔG=ΔH-TΔS, we can conclude:

[0091] -RInVg=ΔH / T-ΔS, then we get:

[0092]

[0093] By plotting -InVg against 1 / T, the adsorption enthalpy and entropy value of the measured sample A for different probes can be obtained from the slope and intercept of the obtained straight line. It is calculated that the surface adsorption enthalpy of sample A for acetone is 46.8 kJ / mol.

[0094] Example 3

[0095] The present embodiment provides an application of a multi-channel surface performance analysis device, which is used to test the surface acidity and alkalinity of a sample A to be tested. According to Gutmann's acid-base theory and in combination with the surface adsorption enthalpy ΔH of sample A to acetone measured in Example 2, the surface acidity and alkalinity constant of sample A are calculated.

[0096] The multi-channel surface performance analysis device used in this embodiment is the same as that in Embodiment 1 and will not be described in detail here.

[0097] The acidity constant and basicity constant of the surface of sample A are calculated by the following method:

[0098] -ΔH=K a ×DN+K b ×AN,

[0099] Where DN and AN are the electron donor constant and electron acceptor constant of the polar probe molecule defined by Gutmann, respectively, and K a , K b The semi-quantitative K of the acid-base properties of the adsorbent surface can be obtained from the slope and intercept of the straight line obtained by plotting -ΔH / AN against DN / AN of various polar probes. a Constant and K b Constant; calculated surface acid constant K of sample A a is 2.45, and the surface alkalinity constant K of sample A b is 1.32, K a / K b is 1.856; it can be seen that the acid-base constant ratio of sample A is greater than 1, so it shows strong acidity.

[0100] In summary, the multi-channel surface performance analysis device in the present invention is simple and convenient to operate, and the probe molecule injection unit, the flow control unit, the detection unit and the data acquisition and processing unit are integrated into one. The probe molecule injection unit realizes the injection of gas probe molecules and liquid probe molecules, and the range of probe molecules is wide. The flow control unit includes a three-way valve, a reference column and a multi-channel test column. The multi-channel test column can be used to test a variety of different solid materials, which greatly improves the test efficiency. The probe molecule passes through the three-way valve, enters the reference column, and then enters the first detector for detection, and flows into each sample column filled with different solid materials to be tested through the first switching valve, and then enters the second detector for detection. The parameters required for the test are obtained by collecting and processing the detection data, which is simple and efficient; the device in the present invention can realize the comprehensive test of the thermodynamic properties and physical and chemical properties of the surface of different types of solid materials, and realizes the analysis of the interaction force between the surface of different solid materials to be tested and different probe molecules, which greatly increases the flexibility and scope of use of the device. Therefore, the present invention effectively overcomes the various shortcomings in the prior art and has a high industrial utilization value.

[0101] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A multi-channel surface performance analysis device, characterized in that: The analysis device comprises: A probe molecule injection unit, the probe molecule injection unit comprising a gas injection component and a liquid injection component, the gas injection component is used to inject gas probe molecules, and the liquid injection component is used to inject liquid probe molecules; A flow control unit, the flow control unit comprising a three-way valve, at least one reference column and a multi-channel test column, the outlet of the probe molecule injection unit is connected to the inlet of the three-way valve, one outlet of the three-way valve is connected to the multi-channel test column through a first pipeline, and is used to inject the probe molecule into the multi-channel test column; the other outlet of the three-way valve is connected to the reference column through a second pipeline, and is used to inject the probe molecule into the reference column; A detection unit, the detection unit comprising a first detector and a second detector, the first detector being connected to the output end of the reference column and used for identifying and responding to the sample separated from the reference column, and the second detector being connected to the output end of the multi-channel test column and used for identifying and responding to the sample separated from the multi-channel test column; A data acquisition and processing unit, wherein the signal input end of the data acquisition and processing unit is connected to the first detector and the second detector respectively, and is used to acquire the detection data of the first detector and the second detector and analyze and process them.

2. The multi-channel surface performance analysis device according to claim 1, characterized in that: The probe molecule injection unit also includes a carrier gas unit, which is respectively connected to the gas injection assembly and the liquid injection assembly for providing carrier gas. A flow control system is provided in the carrier gas unit, and the flow control system is used to control the flow of the carrier gas, wherein the flow control system is one of an electronic pressure control system, an automatic flow control system, an electronic flow control system, and a programmed pressure control system.

3. The multi-channel surface performance analysis device according to claim 1, characterized in that: The multi-channel test column comprises a plurality of sample columns, each of which is filled with the same or different samples to be tested.

4. The multi-channel surface performance analysis device according to claim 3, characterized in that: A first switching valve is also provided on the first pipeline, and a sample outlet valve of the first switching valve is correspondingly connected to the input end of each sample column, and the first switching valve diverts the probe molecules to each sample column; the output end of each sample column is connected to the second detector through a second switching valve, and the sample injection valve of the second switching valve is correspondingly connected to the output end of each sample column, and the sample outlet valve of the second switching valve is connected to the second detector, and the second switching valve switches the probe molecules separated from the sample column into the second detector for detection.

5. The multi-channel surface performance analysis device according to claim 4, characterized in that: When multiple reference columns are provided, a third switching valve is also provided on the second pipeline, and the sample outlet valve of the third switching valve is correspondingly connected to the input end of each reference column, and the third switching valve diverts the probe molecules to each reference column; the output end of each reference column is connected to the first detector through a fourth switching valve, and the sample injection valve of the fourth switching valve is correspondingly connected to the output end of each reference column, and the sample outlet valve of the fourth switching valve is connected to the first detector through a pipeline.

6. The multi-channel surface performance analysis device according to claim 3, characterized in that: The inner diameter of the sample column is 1 mm to 30 mm, and the length of the sample column is 5 cm to 50 cm.

7. The multi-channel surface performance analysis device according to claim 5, characterized in that: The number of the sample columns is 1 to 10, the number of the reference columns is 1 to 10, and the number of the reference columns is not more than the number of the sample columns.

8. The multi-channel surface performance analysis device according to claim 5, characterized in that: The number of passage valves of the first switching valve and the second switching valve is not less than the number of the sample columns; the number of passage valves of the third switching valve and the fourth switching valve is not less than the number of the reference columns.

9. The multi-channel surface performance analysis device according to claim 1, characterized in that: The first detector includes a FID detector or a TCD detector; the second detector includes a FID detector or a TCD detector.

10. An application of a multi-channel surface performance analysis device, characterized in that: The multi-channel surface performance analysis device described in any one of claims 1 to 9 is used to evaluate the surface properties of solid materials.

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