Silver fluoride paste-based triboelectric sensing material and preparation method thereof, and pesticide detection sensor
By preparing silver fluoride paste-based friction electrosensing materials, using the triboelectric effect to detect pesticide residues, the existing pesticide detection technology has been solved, and the rapid and low-cost pesticide residue detection is achieved.
Patent Information
- Application Number
- CN202411671353.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-02-28
AI Technical Summary
The existing pesticide detection technology is complex in operation and high in cost, making it difficult to achieve fast and low-cost pesticide residue detection.
The silver fluoride paste-based friction electrosensing material was used to prepare the material through screen printing, oxygen plasma treatment and chemical vapor deposition technology, and pesticide residues were detected using the triboelectric effect.
It realizes the simple operation, fast detection speed and low cost of pesticide detection, simplifies the detection process and improves the detection efficiency.
Smart Images
Figure CN119534550A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of pesticide detection, and in particular to a method for preparing a silver fluoride paste-based triboelectric sensing material, a silver fluoride paste-based triboelectric sensing material, and a pesticide detection sensor. Background Art
[0002] With the rapid development of agricultural technology, pesticides are widely used in fruit and vegetable cultivation, especially organophosphorus and carbamates. Although pesticides can guarantee the yield of crops to a certain extent, they also bring food safety issues.
[0003] At present, pesticide testing has problems of complex operation and high cost.
[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention
[0005] The purpose of the present disclosure is to provide a method for preparing a silver fluoride paste-based triboelectric sensing material, a silver fluoride paste-based triboelectric sensing material and a pesticide detection sensor, thereby overcoming the problems of complex operation and high cost of pesticide detection at least to a certain extent.
[0006] According to the first aspect of the present disclosure, a method for preparing a fluorinated silver paste-based triboelectric sensing material is provided, comprising: applying silver paste to the surface of an inert solid substrate by screen printing technology to obtain a silver paste-based composite material; performing surface hydroxylation on the silver paste-based composite material by oxygen plasma treatment technology to obtain a hydroxylated silver paste-based composite material; and controlling the hydroxyl groups of the hydroxylated silver paste-based composite material to undergo a dehydration condensation reaction with a fluorinated silane solution by chemical vapor deposition technology to obtain a fluorinated silver paste-based triboelectric sensing material.
[0007] Optionally, the material of the inert solid matrix is polytetrafluoroethylene or polyethylene terephthalate.
[0008] Optionally, the mass of the silver paste is 0.5 g to 2 g.
[0009] Optionally, silver paste is applied to the surface of an inert solid substrate by screen printing technology to obtain a silver paste-based composite material, including: applying silver paste to the surface of an inert solid substrate by screen printing technology, and placing it in an oven at a temperature of 100°C to 160°C for 1h to 3h to obtain a silver paste-based composite material.
[0010] Optionally, parameters of the oxygen plasma treatment include: power of 20 kW to 80 kW, and treatment time of 100 s to 600 s.
[0011] Optionally, the concentration of the fluorine-containing silane solution is 5% to 50%.
[0012] Optionally, the fluorine-containing silane in the fluorine-containing silane solution is 1H,1H,2H,2H-perfluorodecyltrimethoxysilane.
[0013] Optionally, the hydroxyl groups of the hydroxylated silver paste-based composite material are controlled to undergo a dehydration condensation reaction with a fluorinated silane solution by chemical vapor deposition technology to obtain a fluorinated silver paste-based triboelectric sensing material, including: controlling the hydroxyl groups of the hydroxylated silver paste-based composite material to undergo a dehydration condensation reaction with a fluorinated silane solution by chemical vapor deposition technology, and obtaining the fluorinated silver paste-based triboelectric sensing material after drying.
[0014] According to a second aspect of the present disclosure, a silver fluoride paste-based triboelectric sensing material is provided, which is prepared by any of the above-mentioned methods for preparing a silver fluoride paste-based triboelectric sensing material.
[0015] According to a third aspect of the present disclosure, there is provided a pesticide detection sensor, comprising the above-mentioned silver fluoride paste-based triboelectric sensing material.
[0016] In the scheme of the exemplary embodiment of the present disclosure, based on the triboelectric effect, the electric signal generated by the strong electron-withdrawing fluorine groups on the silver fluoride paste-based triboelectric sensing material and the strong electron-losing phosphorus or amino groups on the surface of fruits and vegetables after contact and separation can be used to detect pesticide residues. Therefore, in the field of pesticide detection, the scheme of the present disclosure has the advantages of simple operation, fast detection speed and low cost. In addition, the material preparation process of the present disclosure is simple and easy to operate.
[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.
[0019] Figure 1 The flowchart schematically shows a method for preparing a silver fluoride paste-based triboelectric sensing material according to an exemplary embodiment of the present disclosure.
[0020] Figure 2 The water contact angle of the silver fluoride paste-based triboelectric sensing material prepared in Example 1 of the present disclosure is schematically shown.
[0021] Figure 3The surface morphology of the silver fluoride paste-based triboelectric sensing material prepared in Example 1 of the present disclosure is schematically shown.
[0022] Figure 4 The schematic diagram shows the output voltage corresponding to the detection of grapes before washing by the fluoride silver paste-based triboelectric sensing material prepared in Example 1 of the present disclosure.
[0023] Figure 5 The schematic diagram shows the output voltage corresponding to the detection of washed grapes by the silver fluoride paste-based triboelectric sensing material prepared in Example 1 of the present disclosure. DETAILED DESCRIPTION
[0024] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as being limited to the examples set forth herein; on the contrary, these embodiments are provided so that the present disclosure will be more comprehensive and complete, and the concepts of the example embodiments are fully conveyed to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, processes, steps, etc. may be adopted. In other cases, known technical solutions are not shown or described in detail to avoid obscuring various aspects of the present disclosure.
[0025] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated descriptions will be omitted. The flowcharts shown in the accompanying drawings are only exemplary illustrations and do not necessarily include all the steps. For example, some steps can also be decomposed, while some steps can be combined or partially combined, so the actual execution order may change according to the actual situation.
[0026] At present, pesticide residue detection materials need to rely on large analytical instruments, and the detection operation is complicated and costly. In order to solve or at least alleviate this current problem, the present disclosure provides a new silver fluoride paste-based triboelectric sensing material and a preparation method thereof.
[0027] Figure 1 The flowchart schematically shows a method for preparing a triboelectric sensing material based on a fluoride silver paste according to an exemplary embodiment of the present disclosure. Figure 1 The method for preparing the silver fluoride paste-based triboelectric sensing material according to the embodiment of the present disclosure comprises the following steps:
[0028] S12. Applying silver paste to the surface of an inert solid substrate by screen printing technology to obtain a silver paste-based composite material.
[0029] According to some embodiments of the present disclosure, the material of the inert solid matrix may be polytetrafluoroethylene or polyethylene terephthalate. The mass of the silver paste used in the present disclosure may be 0.5 g to 2 g.
[0030] Specifically, the silver paste can be coated onto the surface of an inert solid substrate by screen printing technology, and placed in an oven at a temperature of 100° C. to 160° C. for 1 h to 3 h to obtain a silver paste-based composite material.
[0031] S14. Surface hydroxylation of the silver paste-based composite material is performed by oxygen plasma treatment technology to obtain a hydroxylated silver paste-based composite material.
[0032] In an exemplary embodiment of the present disclosure, parameters of the oxygen plasma treatment include: a power of 20 kW to 80 kW, and a treatment time of 100 s to 600 s.
[0033] S16. The hydroxyl groups of the hydroxylated silver paste-based composite material are controlled to undergo a dehydration condensation reaction with the fluorinated silane solution by chemical vapor deposition technology to obtain a fluorinated silver paste-based triboelectric sensing material.
[0034] In an exemplary embodiment of the present disclosure, the concentration of the fluorine-containing silane solution is 5% to 50%. The fluorine-containing silane in the fluorine-containing silane solution is 1H, 1H, 2H, 2H-perfluorodecyltrimethoxysilane, and the solvent can be deionized water. That is, the fluorine-containing silane solution of the embodiment of the present disclosure can be a 1H, 1H, 2H, 2H-perfluorodecyltrimethoxysilane hydrolyzate.
[0035] Specifically, after the dehydration condensation reaction, a drying treatment is performed to obtain a silver fluoride paste-based triboelectric sensing material.
[0036] The preparation process of the silver fluoride paste-based triboelectric sensing material disclosed in the present invention is described below through examples.
[0037] Example 1
[0038] First, 1 g of silver paste was coated onto the surface of an inert solid polyethylene terephthalate substrate by screen printing technology and placed in an oven at a temperature of 140° C. for 2 hours to obtain a silver paste-based composite material.
[0039] Next, the silver paste-based composite material is subjected to surface hydroxylation by oxygen plasma treatment technology at a power of 60 kW and a treatment time of 400 s to obtain a hydroxylated silver paste-based composite material.
[0040] Then, a 30% concentration of 1H,1H,2H,2H-perfluorodecyltrimethoxysilane hydrolyzate is used through chemical vapor deposition technology to undergo a dehydration condensation reaction with the hydroxyl group of the hydroxylated silver paste-based composite material. After drying, a fluorinated silver paste-based triboelectric sensing material is obtained.
[0041] Figure 2 The water contact angle of the silver fluoride paste-based triboelectric sensing material prepared in Example 1 of the present disclosure is schematically shown. Figure 3 The surface morphology of the triboelectric sensing material based on silver fluoride paste prepared in Example 1 of the present disclosure is schematically shown. Figure 3 The surface of the triboelectric sensor material based on silver fluoride paste prepared in Example 1 of the present disclosure is smooth and has no cracks.
[0042] Figure 4 The schematic diagram shows the output voltage of the triboelectric sensing material based on fluoride silver paste prepared in Example 1 of the present disclosure before detecting the grapes being washed. Figure 4 , the corresponding output voltage of the grapes before cleaning is 2.4V. Figure 5 The schematic diagram shows the output voltage of the triboelectric sensing material based on fluoride silver paste prepared in Example 1 of the present disclosure after detecting washed grapes. Figure 5 , the output voltage of the washed grapes is 0.4 V. This indicates that the silver fluoride paste-based triboelectric sensing material prepared in Example 1 of the present disclosure has good pesticide residue detection performance.
[0043] Example 2
[0044] First, 0.5 g of silver paste was coated on the surface of a polytetrafluoroethylene inert solid substrate by screen printing technology, and placed in an oven at a temperature of 100° C. for 3 hours to obtain a silver paste-based composite material.
[0045] Next, the silver paste-based composite material is subjected to surface hydroxylation by oxygen plasma treatment technology at a power of 20 kW and a treatment time of 100 s to obtain a hydroxylated silver paste-based composite material.
[0046] Then, a 5% 1H,1H,2H,2H-perfluorodecyltrimethoxysilane hydrolyzate is subjected to a dehydration condensation reaction with the hydroxyl group of the hydroxylated silver paste-based composite material through chemical vapor deposition technology, and after drying, a fluorinated silver paste-based triboelectric sensing material is obtained.
[0047] Through the detection of pesticide residues in grapes similar to that in Example 1, the output voltages of the grapes before and after washing were 2.0 V and 0.5 V, respectively. This indicates that the silver fluoride paste-based triboelectric sensing material prepared in Example 2 of the present disclosure has good pesticide residue detection performance.
[0048] Example 3
[0049] First, 2 g of silver paste was coated on the surface of a polyethylene terephthalate inert solid substrate by screen printing technology and placed in an oven at a temperature of 160° C. for 1 hour to obtain a silver paste-based composite material.
[0050] Next, the silver paste-based composite material is subjected to surface hydroxylation by oxygen plasma treatment technology at a power of 80 kW and a treatment time of 600 s to obtain a hydroxylated silver paste-based composite material.
[0051] Then, a 50% concentration of 1H,1H,2H,2H-perfluorodecyltrimethoxysilane hydrolyzate is used through chemical vapor deposition technology to undergo a dehydration condensation reaction with the hydroxyl group of the hydroxylated silver paste-based composite material. After drying, a fluorinated silver paste-based triboelectric sensing material is obtained.
[0052] Through the detection of pesticide residues in grapes similar to that in Example 1, the output voltages of the grapes before and after washing were 2.2 V and 0.4 V, respectively, indicating that the silver fluoride paste-based triboelectric sensing material prepared in Example 3 of the present disclosure also has good pesticide residue detection performance.
[0053] Furthermore, the disclosed embodiment also provides a silver fluoride paste-based triboelectric sensing material, which is prepared from the above-mentioned silver fluoride paste-based triboelectric sensing material.
[0054] Furthermore, the embodiments of the present disclosure also provide a pesticide detection sensor, which includes the above-mentioned silver fluoride paste-based triboelectric sensing material. It is understandable that the pesticide detection sensor also includes components such as electrodes that are commonly included in sensors, and the present disclosure does not limit this.
[0055] It should be noted that although the steps of the method in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in this specific order, or that all the steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps, etc.
[0056] In addition, the above-mentioned figures are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present disclosure, and are not intended to be limiting. It is easy to understand that the processes shown in the above-mentioned figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.
[0057] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing what is disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and embodiments are to be considered merely as exemplary, and the true scope and spirit of the present disclosure are indicated by the claims.
[0058] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims
1. A method for preparing a triboelectric sensing material based on silver fluoride paste, characterized in that: include: The silver paste is applied to the surface of the inert solid substrate by screen printing technology to obtain a silver paste-based composite material; Surface hydroxylation of the silver paste-based composite material is performed by oxygen plasma treatment technology to obtain a hydroxylated silver paste-based composite material; The chemical vapor deposition technology is used to control the hydroxyl groups of the hydroxylated silver paste-based composite material to undergo a dehydration condensation reaction with a fluorinated silane solution to obtain a fluorinated silver paste-based triboelectric sensing material.
2. The preparation method according to claim 1, characterized in that: The material of the inert solid matrix is polytetrafluoroethylene or polyethylene terephthalate.
3. The preparation method according to claim 1 or 2, characterized in that: The mass of the silver paste is 0.5 g to 2 g.
4. The preparation method according to claim 1 or 2, characterized in that: The silver paste is coated onto the surface of an inert solid substrate by screen printing technology to obtain a silver paste-based composite material, including: The silver paste is coated onto the surface of an inert solid substrate by screen printing technology, and placed in an oven at a temperature of 100° C. to 160° C. for 1 h to 3 h to obtain a silver paste-based composite material.
5. The preparation method according to claim 1, characterized in that: The parameters of the oxygen plasma treatment include: power of 20 kW to 80 kW, and treatment time of 100 s to 600 s.
6. The preparation method according to claim 1, characterized in that: The concentration of the fluorine-containing silane solution is 5% to 50%.
7. The preparation method according to claim 1 or 6, characterized in that: The fluorine-containing silane in the fluorine-containing silane solution is 1H,1H,2H,2H-perfluorodecyltrimethoxysilane.
8. The preparation method according to claim 1, characterized in that: The hydroxyl groups of the hydroxylated silver paste-based composite material are controlled to undergo a dehydration condensation reaction with a fluorinated silane solution by chemical vapor deposition technology to obtain a fluorinated silver paste-based triboelectric sensing material, comprising: The chemical vapor deposition technology is used to control the hydroxyl groups of the hydroxylated silver paste-based composite material to undergo a dehydration condensation reaction with a fluorinated silane solution, and after drying, a fluorinated silver paste-based triboelectric sensing material is obtained.
9. A triboelectric sensing material based on silver fluoride paste, characterized in that: The triboelectric sensor material is prepared by the method for preparing the silver fluoride paste-based triboelectric sensor material according to any one of claims 1 to 8.
10. A pesticide detection sensor, characterized in that: Including the silver fluoride paste-based triboelectric sensing material as described in claim 9.