Complex material with temperature-sensitive discoloration and ammonia response functions as well as preparation method and application of complex material
Complex materials with temperature-sensitive discoloration, ammonia response and ultraviolet absorption were prepared through the reaction of iron sulfate and L-tryptophan, which solved the problems of high cost and single function of existing ammonia detection methods, and achieved low cost , preparation of multifunctional materials with simple process, suitable for temperature-sensitive discoloration, ammonia detection and environmental safety.
Patent Information
- Application Number
- CN202311215308.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-20
- Publication Date
- 2024-12-13
AI Technical Summary
The existing ammonia detection methods have high cost, large equipment, inconvenient real-time monitoring, difficult to widely use, and lack nanomaterials that have both temperature-sensitive discoloration, antibacterial functions and ammonia response.
By reacting iron sulfate and L-tryptophan in a specific solvent and adjusting the pH, a complex material with temperature-sensitive discoloration, ammonia response and ultraviolet absorption is prepared. The process is simple, environmentally friendly and low-cost.
The prepared materials have excellent temperature-sensitive discoloration, ammonia response discoloration and ultraviolet absorption properties. They are suitable for temperature-sensitive discoloration materials, ammonia detection, ultraviolet protection and environmental safety fields, realizing the preparation of multifunctional materials with low cost and simple processes. .
Smart Images
Figure CN119119133A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of complex materials, and in particular relates to a complex material having both temperature-sensitive color change and ammonia response functions, and a preparation method and application thereof. Background Art
[0002] Ammonia is a colorless and odorless harmful gas. When people are in a 25ppm ammonia environment for 8h, or even 35ppm ammonia for 15min, ammonia will cause serious damage to people's eyes and respiratory tract. Common ammonia detection methods are optical method, calorimetry, gas chromatography and acoustic method. These methods require special instruments and equipment, and have problems such as high cost, large size, inconvenience in use, inability to monitor in real time, and difficulty in widespread promotion and application. Researchers are paying more and more attention to nanoparticles with ammonia response function with low cost, simple synthesis process, high sensitivity, low detection limit, short response time and high recovery rate. Nanomaterials with multiple functions (such as temperature-sensitive color change, antibacterial function, ammonia response and ultraviolet absorption, etc.) have broad application prospects in gas sensing, biomedicine, food packaging, environmental safety and other fields, and have become a current research hotspot. Therefore, developing simple and economical methods to prepare multifunctional (such as temperature-sensitive color change, antibacterial function, ammonia response color change and ultraviolet absorption, etc.) materials has broad application prospects. Summary of the invention
[0003] Based on the above background, the present invention provides a complex material having both temperature-sensitive color change and ammonia response functions, and a preparation method and application thereof. The complex material having both temperature-sensitive color change and ammonia response functions prepared by the present invention has excellent temperature-sensitive color change performance, ammonia response color change performance and ultraviolet absorption performance, and the preparation process is simple, environmentally friendly, low-cost, and suitable for scaled-up production.
[0004] Technical solution of the present invention:
[0005] A method for preparing a complex material having both temperature-sensitive color change and ammonia response functions, comprising the following steps:
[0006] (1) dissolving 10 parts of ferric sulfate in a mixed solvent of 500 parts of deionized water and 2000 parts of ethanol to obtain a uniform ferric sulfate solution for later use;
[0007] (2) adding 20 parts of L-tryptophan to a mixed solvent of 500 parts of deionized water and 5000 parts of ethanol, then adjusting the pH to 8 with a 1 mol / L sodium hydroxide alcohol solution, stirring at room temperature for 30 minutes to obtain a uniform solution for later use;
[0008] (3) Add the solution obtained in step (2) to the ferric sulfate solution obtained in step (1), stir and react at room temperature for 1 hour, then centrifuge, wash, and freeze-dry to obtain a complex material with both temperature-sensitive color change and ammonia response functions.
[0009] The application of the complex material having both temperature-sensitive color-changing and ammonia response functions is characterized in that it is used in the fields of temperature-sensitive color-changing materials, visual detection of ammonia, ultraviolet protection, and environmental safety.
[0010] The present invention has the beneficial effects:
[0011] The complex material with both temperature-sensitive color-changing and ammonia-responsive functions prepared by the present invention has excellent temperature-sensitive color-changing performance, ammonia-responsive color-changing performance and ultraviolet absorption performance, and the preparation process is simple, environmentally friendly, and low-cost, and is suitable for scaled-up production. It has broad application prospects in the fields of temperature-sensitive color-changing materials, visual detection of ammonia, ultraviolet protection, environmental safety, etc. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The infrared spectra of L-tryptophan and the complex materials prepared in the embodiments of the present invention;
[0013] Figure 2 This is the UV-visible absorption spectrum of the complex material prepared in the embodiment of the present invention. DETAILED DESCRIPTION
[0014] The present invention is described in detail below through examples. It is necessary to point out that the examples are only used to further illustrate the present invention and cannot be understood as limiting the scope of the present invention. Those skilled in the art can make some non-essential improvements and adjustments based on the above contents of the present invention. The parts of the raw materials are all parts by mass unless otherwise specified.
[0015] In a specific embodiment, ferric sulfate, ethanol and sodium hydroxide are analytically pure reagents provided by Xilong Chemical Co., Ltd.; L-tryptophan is an analytically pure reagent provided by Shanghai Yien Chemical Technology Co., Ltd.
[0016] Example:
[0017] A method for preparing a complex material having both temperature-sensitive color change and ammonia response functions, comprising the following steps:
[0018] (1) dissolving 10 parts of ferric sulfate in a mixed solvent of 500 parts of deionized water and 2000 parts of ethanol to obtain a uniform ferric sulfate solution for later use;
[0019] (2) adding 20 parts of L-tryptophan to a mixed solvent of 500 parts of deionized water and 5000 parts of ethanol, then adjusting the pH to 8 with a 1 mol / L sodium hydroxide alcohol solution, stirring at room temperature for 30 minutes to obtain a uniform solution for later use;
[0020] (3) Add the solution obtained in step (2) to the ferric sulfate solution obtained in step (1), stir and react at room temperature for 1 hour, then centrifuge, wash, and freeze-dry to obtain a complex material with both temperature-sensitive color change and ammonia response functions.
[0021] Figure 1 This is an infrared spectrum of the complex material with both temperature-sensitive color change and ammonia response functions prepared in an embodiment of the present invention; the results show that compared with L-tryptophan, the complex material with both temperature-sensitive color change and ammonia response functions prepared in the present invention has a different structure.
[0022] The complex material with both temperature-sensitive color change and ammonia response functions prepared in the embodiment of the present invention is yellow in color. After being exposed to an ammonia environment, its color quickly changes to brown, indicating that the complex material has excellent ammonia response color change performance.
[0023] The complex material with both temperature-sensitive color change and ammonia response functions prepared in the embodiment of the present invention is yellow in color. When placed in a high temperature environment of 90° C., its color quickly changes to dark brown, indicating that the complex material has excellent temperature-sensitive color change performance.
[0024] The UV-visible properties of the materials were evaluated using a UV-visible spectrometer (Lamdba365, PerkinElmer Instruments); Figure 2 This is the UV-visible spectrum of the ethanol dispersion of the complex material with both UV blocking and ammonia response functions prepared in an embodiment of the present invention; the result shows that the complex material with both temperature-sensitive color change and ammonia response functions prepared in an embodiment of the present invention has significant UV absorption performance.
[0025] In summary, the complex material with both thermochromic and ammonia response functions prepared by the present invention has excellent thermochromic performance, ammonia response color change performance and ultraviolet absorption performance, and the preparation process is simple, environmentally friendly, low-cost, and suitable for large-scale production. It has broad application prospects in the fields of thermochromic materials, visual detection of ammonia, ultraviolet protection, environmental safety, etc.
[0026] The content of the present invention is not limited to the embodiments listed, and any equivalent changes made to the technical solution of the present invention by ordinary technicians in this field after reading the description of the present invention are covered by the claims of the present invention.
Claims
1. A method for preparing a complex material having both temperature-sensitive color change and ammonia response functions, characterized in that: The following steps are involved: (1) dissolving 10 parts of ferric sulfate in a mixed solvent of 500 parts of deionized water and 2000 parts of ethanol to obtain a uniform ferric sulfate solution for later use; (2) adding 20 parts of L-tryptophan to a mixed solvent of 500 parts of deionized water and 5000 parts of ethanol, then adjusting the pH to 8 with a 1 mol / L sodium hydroxide alcohol solution, stirring at room temperature for 30 minutes to obtain a uniform solution for later use; (3) Add the solution obtained in step (2) to the ferric sulfate solution obtained in step (1), stir and react at room temperature for 1 hour, then centrifuge, wash, and freeze-dry to obtain a complex material with both temperature-sensitive color change and ammonia response functions.
2. A complex material having both temperature-sensitive color change and ammonia response functions obtained according to the preparation method of claim 1.
3. The use of the complex material having both temperature-sensitive color change and ammonia response functions obtained by the preparation method according to claim 1, characterized in that: Used in the fields of temperature-sensitive color-changing materials, visual detection of ammonia, UV protection, and environmental safety.