Resin preparation method capable of accurately identifying characteristic spectrum

Abstract

The invention discloses a resin preparation method capable of accurately identifying a characteristic spectrum, which comprises the following steps: according to the characteristics of a plastic master batch, selecting a substance 1, a substance 2,..., and a substance A which have characteristic spectrum peaks with the plastic master batch in a spectrum a, and mixing the substance 1, the substance 2,..., and the substance A in the step to obtain a spectrum group a mixture, where A is a natural number greater than or equal to 1; and so on, obtaining a spectrum group b mixture until a spectrum group X mixture is obtained; mixing the mixture of the spectrum group a, the mixture of the spectrum group b,..., and the mixture of the spectrum group X to obtain a customized substance Y, identifying by using X spectrums, and coding and recording obtained spectrum information to obtain a spectrum characteristic database of the substance Y; and mixing the customized substance Y with plastic master batches, and extruding to obtain a customized plastic substance Z. According to the invention, on the premise of not changing the performance of the original plastic product, a certain type or a certain batch of plastic can be accurately identified.

Description

Technical Field

[0001] The present invention relates to the field of resin preparation, and in particular to a resin preparation method capable of accurately identifying characteristic spectra. Background Art

[0002] Plastics, with their excellent physical and chemical properties, have long been integrated into every aspect of our lives. Globally, approximately 400 million tons of plastic are produced and processed annually. However, most plastic products are extremely difficult to degrade in nature, and the traditional landfilling of discarded plastics is increasingly subject to environmental and regulatory restrictions. Incineration of waste plastics also leads to serious environmental pollution and carbon dioxide emissions. Statistics show that over the life cycle of plastic, every ton of plastic produced and incinerated emits an average of 2.0-2.3 tons of carbon dioxide. Coupled with the rising price of plastic raw materials, the recycling of plastic products is gaining increasing attention. However, due to the complex composition and inconsistent formulations of plastics, even within the same plastic product type, batches can vary in color, mechanical strength, flowability, flame retardancy, and other aspects. This makes recycling and reprocessing plastics challenging. After initial screening to determine the main components, the plastics must undergo cleaning, crushing, modification, reprocessing, and extrusion pelletization. Recycled plastics often have lower performance than newly produced plastic masterbatch, and the cost of recycled plastics is higher than that of newly produced plastic masterbatch. Summary of the Invention

[0003] To overcome the above shortcomings, the purpose of the present invention is to provide a series of plastic additives with specific spectral properties obtained through formulation and synthesis, namely plastic fingerprint materials. After adding a small amount, a certain type or batch of plastics can be accurately identified without changing the performance of the original plastic product, providing the feasibility of simple processing and reuse, thereby greatly reducing the pollution and carbon emissions problems in the production and disposal of plastics. A resin preparation method that can accurately identify characteristic spectra.

[0004] In order to achieve the above objectives, one of the technical solutions adopted by the present invention is: a method for preparing a resin that can accurately identify a characteristic spectrum, comprising the following steps:

[0005] Step 1: selecting, based on the characteristics of the plastic masterbatch, substance 1, substance 2, ..., substance A having characteristic spectral peaks in spectrum a of the plastic masterbatch, and mixing the substances 1, 2, ..., A in this step to obtain a mixture of spectrum a group, wherein A is a natural number ≥ 1;

[0006] Step 2: selecting, based on the characteristics of the plastic masterbatch, substance 1, substance 2, ..., substance B having characteristic spectral peaks in spectrum b that are present in the plastic masterbatch, and mixing the substances 1, 2, ..., B in this step to obtain a mixture of spectrum b group, where B is a natural number ≥ 1;

[0007] Step 3, similarly, according to the characteristics of the plastic masterbatch, select substance 1, substance 2, ..., substance X, which have characteristic spectral peaks in spectrum X with the plastic masterbatch, and mix the substances 1, 2, ..., X in this step to obtain a mixture of spectrum X, where X is a natural number ≥ 1;

[0008] Step 4: The mixture of spectral group a, the mixture of spectral group b, and so on, up to the mixture of spectral group X, are remixed to obtain a customized substance Y. The obtained substance Y has a unique artificial spectral curve, which is then identified using X types of spectra. The obtained spectral information is encoded and recorded to obtain its spectral feature database;

[0009] Step 5: The customized substance Y is mixed with the plastic masterbatch and then extruded to obtain the customized plastic substance Z. The customized plastic substance Z has all the characteristic spectral peaks corresponding to all the above-mentioned single-component compounds.

[0010] Preferably, the plastic material Z has characteristic peaks of exclusive spectral combination, and each spectral method is used as one-dimensional data to obtain X-dimensional data.

[0011] Preferably, a is one of a fluorescence spectrum, an XRF spectrum, an infrared spectrum (FTIR), and an ultraviolet-visible spectrum; the spectrum b is one of a fluorescence spectrum, an XRF spectrum, an infrared spectrum, and an ultraviolet-visible spectrum; and the spectrum X is one of a fluorescence spectrum, an XRF spectrum, an infrared spectrum, and an ultraviolet-visible spectrum.

[0012] Preferably, when fluorescence spectroscopy is used, the substance with characteristic spectral peaks present in the fluorescence spectrum is at least one of solvent Yellow 93, solvent Red 212, rare earth compound CeS, methylated solvent Yellow 93, nitrated solvent Red 212, rare earth compound CeS wrapped in ZnO shell, europium-based MOFs (Eu-MOFs), SrAl2O4:Eu2+, Ba5CaAl4O12:Tb3+ naphthaleneimide derivative PONA6, naphthaleneimide derivative PONA7, fluorescein isothiocyanate (FlTC), and tetraethylrhodamine (RB200).

[0013] Preferably, when XRF spectroscopy is used, the substance with the characteristic spectral peak in the XRF spectrum is at least one of Cu, Fe, Zn, Ag, and Pb.

[0014] Preferably, when using infrared spectroscopy (FTIR), the substance with characteristic spectral peaks in the infrared spectrum is at least one of polycarbonate (PC), polyetheretherketone (PEEK), polycaprolactone (PCL), and polylactic acid (PLA).

[0015] Preferably, when ultraviolet-visible spectroscopy (UV-Vis) is used, the substances with characteristic spectral peaks in the UV-Vis spectrum are lycopene, azobenzene (C 12 H 10 N2), β-carotene (C 40 H 56 ), at least one of luteolin.

[0016] Preferably, in step six, the plastic material to be identified is recovered, and by comparing the spectral information group of the known spectral feature database and using the corresponding spectrometer, it is identified whether the plastic material to be identified contains the customized substance Y, and then it is determined whether the plastic material to be identified is the customized plastic material Z.

[0017] The beneficial effects of the present invention are:

[0018] First, the combined use of multiple combined spectra avoids the problem of a single spectrum with limited wavelength and easy overlap and superposition of spectral peaks, and its specific information content is large;

[0019] Secondly, if we do not know which spectral characteristic peak is used, various characterization methods of known solid substances such as infrared, fluorescence, XRF, and Raman can be used, thus making the possibility of cracking the customized substance Y extremely low;

[0020] Third, the use of spectroscopy as an identification method has high specificity and accuracy, and can be used to quantify a single substance on a single spectrum;

[0021] Fourthly, the above method can be used to encrypt and encode multi-dimensional spectral information, with low repeatability;

[0022] Fifth, any single component substance in the mixed substance Y can change the characteristic peak wavelength on a certain spectrum through chemical synthesis. Therefore, the number of spectral codes of customized substance Y can increase indefinitely. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 Schematic diagram of the process of this embodiment. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See Figure 1 As shown, this embodiment discloses a method for preparing a resin that can accurately identify a characteristic spectrum, which is characterized by comprising the following steps:

[0027] Step 1: selecting, based on the characteristics of the plastic masterbatch, substance 1, substance 2, ..., substance A having characteristic spectral peaks in spectrum a of the plastic masterbatch, and mixing the substances 1, 2, ..., A in this step to obtain a mixture of spectrum a group, wherein A is a natural number ≥ 1;

[0028] Step 2: selecting, based on the characteristics of the plastic masterbatch, substance 1, substance 2, ..., substance B having characteristic spectral peaks in spectrum b that are present in the plastic masterbatch, and mixing the substances 1, 2, ..., B in this step to obtain a mixture of spectrum b group, where B is a natural number ≥ 1;

[0029] Step 3, similarly, according to the characteristics of the plastic masterbatch, select substance 1, substance 2, ..., substance X, which have characteristic spectral peaks in spectrum X with the plastic masterbatch, and mix the substances 1, 2, ..., X in this step to obtain a mixture of spectrum X, where X is a natural number ≥ 1;

[0030] Step 4: The mixture of spectral group a, the mixture of spectral group b, and so on, up to the mixture of spectral group X, are remixed to obtain a customized substance Y. The obtained substance Y has a unique artificial spectral curve, which is then identified using X types of spectra. The obtained spectral information is encoded and recorded to obtain its spectral feature database;

[0031] Step 5: The customized substance Y is mixed with the plastic masterbatch and then extruded to obtain a customized plastic substance Z. The customized plastic substance Z has all the characteristic spectral peaks corresponding to all the above-mentioned single-component compounds;

[0032] Step 6: Recover the plastic material to be identified, compare the spectral information group of the known spectral feature database, and use the corresponding spectrometer to identify whether the plastic material to be identified contains the customized substance Y, and then determine whether the plastic material to be identified is the customized plastic material Z.

[0033] The customized plastic material Z in this embodiment has characteristic peaks with a unique spectral combination, and each spectral method is used as one-dimensional data to obtain X-dimensional data.

[0034] The spectrum a is one of a fluorescence spectrum, an XRF spectrum, an infrared spectrum (FTIR), and an ultraviolet-visible spectrum; the spectrum b is one of a fluorescence spectrum, an XRF spectrum, an infrared spectrum, and an ultraviolet-visible spectrum; and the spectrum X is one of a fluorescence spectrum, an XRF spectrum, an infrared spectrum, and an ultraviolet-visible spectrum.

[0035] In some embodiments, it may be a mixture of two spectra, such as:

[0036] It can be a mixture of substances with fluorescence spectrum characteristics and substances with XRF spectrum;

[0037] It can be a mixture of a substance with XRF spectral characteristics and a substance with infrared spectral characteristics;

[0038] It can be a combination of a substance having fluorescent spectral characteristics and a substance having infrared spectral characteristics;

[0039] It can be a combination of a substance having fluorescence spectrum characteristics and a substance having ultraviolet-visible spectrum characteristics; it can be a combination of a substance having XRF spectrum characteristics and a substance having ultraviolet-visible spectrum characteristics; it can be a combination of a substance having infrared spectrum characteristics and a substance having ultraviolet-visible spectrum characteristics;

[0040] In this embodiment, the substances having XRF spectral characteristics may be one, two, or more substances; the substances having XRF spectral characteristics may be one, two, or more substances; the substances having fluorescence spectral characteristics may be one, two, or more substances; and the substances having UV-visible spectral characteristics may be one, two, or more substances.

[0041] In some embodiments, it may be a mixture of three spectra, such as:

[0042] It can be a mixture of substances with fluorescence spectrum characteristics, substances with XRF spectrum characteristics, and substances with infrared spectrum characteristics;

[0043] It can be a mixture of substances with fluorescence spectrum characteristics, substances with XRF spectrum characteristics, and substances with UV-visible spectrum characteristics;

[0044] It can be a mixture of substances with XRF spectrum characteristics, substances with infrared spectrum characteristics, and substances with UV-visible spectrum characteristics;

[0045] Similarly, in this embodiment, the substances having XRF spectral characteristics can be one, two, or more; the substances having XRF spectral characteristics can be one, two, or more; the substances having fluorescence spectral characteristics can be one, two, or more; and the substances having UV-visible spectral characteristics can be one, two, or more.

[0046] In some embodiments, it may be a mixture of one spectrum, but the substance having the single fluorescence spectrum characteristic may be a mixture of two or more substances.

[0047] When fluorescence spectroscopy is used, the substances with characteristic spectral peaks in the fluorescence spectrum are solvent yellow 93, solvent red 212, rare earth compound CeS, solvent yellow 93 methylation, solvent red 212 nitration, rare earth compound CeS wrapped ZnO shell, europium-based MOFs (Eu-MOFs), SrAl2O4:Eu 2+ 、Ba5CaAl4O 12 :Tb 3+ At least one of the naphthalimide derivative PONA6, the naphthalimide derivative PONA7, fluorescein isothiocyanate (FITC), and tetraethylrhodamine (RB200). As shown in the table below, the spectral characteristics of the naphthalimide derivative PONA6 and the naphthalimide derivative PONA7 have characteristic peaks at different positions.

[0048]

[0049] When XRF spectroscopy is used, the substance with the characteristic spectral peak in the XRF spectrum is at least one of Cu, Fe, Zn, Ag, and Pb.

[0050]

[0051]

[0052] When infrared spectroscopy (FTIR) is used, the substance having characteristic spectral peaks in the infrared spectrum is at least one of polycarbonate (PC), polyetheretherketone (PEEK), polycaprolactone (PCL), and polylactic acid (PLA).

[0053]

[0054] When using UV-Vis spectroscopy (UV-Vis), the substances with characteristic spectral peaks in the UV-Vis spectrum are lycopene, azobenzene (C 12 H 10 N2), β-carotene (C 40 H 56 ), at least one of luteolin.

[0055]

[0056] Application of this embodiment:

[0057] Application 1 uses fluorescence spectroscopy, XRF spectroscopy, and UV-visible spectroscopy;

[0058] Among them, the substances with fluorescent spectra are solvent yellow 93, solvent red 212, and rare earth compound CeS; the substances with XRF spectral characteristics are Cu and Fe elements; the substances with UV-visible spectral characteristics are lycopene and luteolin. After mixing the three, they are mixed with plastic masterbatch and then extruded to obtain a customized plastic substance Z′. The customized plastic substance Z′ has all the characteristic spectral peaks corresponding to all the above-mentioned single-component compounds.

[0059] In this application, the customized plastic material Z′ was tested and identified to have the following spectral characteristics: -1 )=653, 687, 874, 925 have characteristic peaks. In addition, the height of each characteristic peak is proportional to the concentration of each substance. The wavelength of the X-ray of the Cu element Kα1 line is and wavelength The corresponding Cu element Kα1 line X-ray photon energy is 8.04keV. The Fe element Kα1 line X-ray wavelength is and wavelength The corresponding X-ray photon energy is 6.37 keV. Lycopene has a maximum absorption wavelength of 470 nm in the spectrum, while luteolin has two maximum absorption wavelengths in the spectrum, at 267 nm and 354 nm.

[0060] Application 2 uses fluorescence spectroscopy, XRF spectroscopy, and UV-visible spectroscopy;

[0061] Among them, the substances with fluorescent spectra are solvent yellow 93 methylation, solvent red 212 nitration, rare earth compound CeS wrapped ZnO shell, substances with XRF spectral characteristics are Zn element and Ag element, and substances with UV-visible spectral characteristics are β-carotene (C 40 H 56), luteolin, after mixing the three groups of spectral characteristic substances, mixing them with plastic masterbatch and then extruding, a customized plastic substance Z″ is obtained. The customized plastic substance Z″ has all the characteristic spectral peaks corresponding to all the above-mentioned single-component compounds.

[0062] In this second application, the customized plastic material Z″ was tested and identified to have the following spectral characteristics:

[0063] The fluorescence spectrum was obtained at the characteristic wavelength (cm -1 )=667, 692, 874, 925 have characteristic peaks. In addition, the height of each characteristic peak is proportional to the concentration of each substance. The wavelength of the X-ray of the Zn element Kα1 line is and wavelength The corresponding X-ray photon energy of the Zn element Kα1 line is 8.64keV; the wavelength of the Ag element Kβ2 line is 0.0487nm, and the corresponding energy is 25.34keV. 40 H 56 ) has a maximum absorption wavelength of 415 nm in the spectrum; luteolin has two maximum absorption wavelengths in the spectrum, which are 267 nm and 354 nm.

[0064] Application three uses fluorescence spectroscopy, XRF spectroscopy, and UV-visible spectroscopy;

[0065] Among them, the substances with fluorescent spectra are naphthaleneimide derivative PONA7 and fluorescein isothiocyanate (FlTC), the substances with XRF spectral characteristics are Zn element and Pb element, and the substances with ultraviolet-visible spectral characteristics are lycopene and luteolin. After mixing the three groups of substances with spectral characteristics, they are mixed with plastic masterbatch and then extruded to obtain a customized plastic substance Z″′. The customized plastic substance Z″′ has all the characteristic spectral peaks corresponding to all the above-mentioned single-component compounds.

[0066] In this third application, the customized plastic material Z″′ was tested and identified to have the following spectral characteristics:

[0067] The peak wavelength of fluorescence emission of the naphthaleneimide derivative PONA7 is 441 nm (full width at half maximum 74 nm), and the strongest region of fluorescence emission of fluorescein isothiocyanate (FlTC) is in the wavelength range of 520-530 nm, which is in the yellow-green region of visible light. The X-ray wavelength of the Zn element Kα1 line is and wavelength The corresponding X-ray photon energy of the Zn element Kα1 line is 8.64 keV; the wavelength of the X-ray fluorescence of the Pb element Lβ3 line is 0.0969 nanometers, and the energy of the X-ray fluorescence photon of the Pb element Lβ 3 line is 12.73 kiloelectron volts; lycopene has a maximum absorption wavelength of 470 nm in the spectrum; luteolin has two maximum absorption wavelengths in the spectrum, namely 267 nm and 354 nm.

[0068] Application four uses fluorescence spectroscopy, XRF spectroscopy and infrared spectroscopy (FTIR);

[0069] Among them, the substances with fluorescent spectra are fluorescein isothiocyanate (FITC) and tetraethylrhodamine (RB200), the substances with XRF spectral characteristics are Cu element and Ag element, and the substances with infrared spectral (FTlR) spectral characteristics are polycaprolactone (PCL) and polylactic acid (PLA). After mixing the three groups of substances with spectral characteristics, mixing them with plastic masterbatch and then extruding them, a customized plastic substance Z″″ is obtained. The customized plastic substance Z″″ has all the characteristic spectral peaks corresponding to all the above-mentioned single-component compounds.

[0070] In this fourth application, the customized plastic material Z″″ was tested and identified to have the following spectral characteristics:

[0071] The strongest region of fluorescence emission from fluorescein isothiocyanate (FlTC) is in the wavelength range of 520-530nm, and the wavelength of light from 520-530nm is in the yellow-green region of visible light; the strongest region of fluorescence emission from tetraethylrhodamine (RB200) is in the wavelength range of 595-600nm, and the wavelength of light from 595-600nm is in the orange-red region of visible light; the wavelength of X-ray of Cu element Kα1 line is and wavelength The corresponding Cu element Kα1 line X-ray photon energy is 8.04keV; the Ag element Kβ2 line has a wavelength of 0.0487nm and a corresponding energy of 25.34keV; polycaprolactone molecules contain carbonyl functional groups (C=O), which appear at 1731cm in the infrared spectrum. -1 The absorption peak is generated at the wavenumber position. There is also a CO bond in the polycaprolactone molecule. The characteristic absorption peak position of the CO bond vibration in the infrared spectrum is 962cm -1 Polylactic acid (PLA) contains carbonyl functional groups (C=O). In infrared spectroscopy, carbonyl functional groups (C=O) appear at 1757 cm -1 There is an absorption peak at the wavenumber position. There are also methyl groups in polylactic acid (PLA). The characteristic absorption peak position of the methyl group vibration is 757cm -1 .

[0072] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for preparing a resin capable of accurately identifying a characteristic spectrum, characterized in that: The steps include: Step 1: selecting, based on the characteristics of the plastic masterbatch, substance 1, substance 2, ..., substance A having characteristic spectral peaks in spectrum a of the plastic masterbatch, and mixing the substances 1, 2, ..., A in this step to obtain a mixture of spectrum a group, wherein A is a natural number ≥ 1; Step 2: selecting, based on the characteristics of the plastic masterbatch, substance 1, substance 2, ..., substance B having characteristic spectral peaks in spectrum b that are present in the plastic masterbatch, and mixing the substances 1, 2, ..., B in this step to obtain a mixture of spectrum b group, where B is a natural number ≥ 1; Step 3, similarly, according to the characteristics of the plastic masterbatch, select substance 1, substance 2, ..., substance X, which have characteristic spectral peaks in spectrum X with the plastic masterbatch, and mix the substances 1, 2, ..., X in this step to obtain a mixture of spectrum X, where X is a natural number ≥ 1; Step 4: The mixture of spectral group a, the mixture of spectral group b, and so on, up to the mixture of spectral group X, are remixed to obtain the customized substance Y, which is then identified using X types of spectra. The obtained spectrum information is encoded and recorded to obtain its spectral feature database; Step 5: The customized substance Y is mixed with the plastic masterbatch and then extruded to obtain the customized plastic substance Z. The customized plastic substance Z has all the characteristic spectral peaks corresponding to all the above-mentioned single-component compounds.

2. The method for preparing a resin capable of accurately identifying a characteristic spectrum according to claim 1, wherein: The plastic material Z has characteristic peaks with exclusive spectral combinations, and each spectral method is used as one-dimensional data to obtain X-dimensional data.

3. The method for preparing a resin capable of accurately identifying a characteristic spectrum according to claim 1, wherein: The spectrum a is one of a fluorescence spectrum, an XRF spectrum, an infrared spectrum, and an ultraviolet-visible spectrum; The spectrum b is one of a fluorescence spectrum, an XRF spectrum, an infrared spectrum, and a UV-visible spectrum; The spectrum X is one of a fluorescence spectrum, an XRF spectrum, an infrared spectrum, and an ultraviolet-visible spectrum.

4. The method for preparing a resin capable of accurately identifying a characteristic spectrum according to claim 3, wherein: When fluorescence spectroscopy is used, the substances with characteristic spectral peaks in the fluorescence spectrum are solvent yellow 93, solvent red 212, rare earth compound CeS, solvent yellow 93 methylation, solvent red 212 nitration, rare earth compound CeS wrapped ZnO shell, europium-based MOFs (Eu-MOFs), SrAl2O4:Eu 2+ 、Ba5CaAl4O 12 :Tb 3+ At least one of the naphthalene imide derivative PONA6, the naphthalene imide derivative PONA7, fluorescein isothiocyanate (FITC), and tetraethylrhodamine (RB200).

5. The method for preparing a resin capable of accurately identifying a characteristic spectrum according to claim 3, wherein: When XRF spectroscopy is used, the substance with the characteristic spectral peak in the XRF spectrum is at least one of Cu, Fe, Zn, Ag, and Pb.

6. The method for preparing a resin capable of accurately identifying a characteristic spectrum according to claim 3, wherein: When infrared spectroscopy is used, the substance having the characteristic spectral peak in the infrared spectrum is at least one of polycarbonate, polyetheretherketone, polycaprolactone, and polylactic acid.

7. The method for preparing a resin capable of accurately identifying a characteristic spectrum according to claim 3, wherein: When UV-visible spectroscopy is used, the substances with characteristic spectral peaks in the UV-visible spectrum are lycopene, azobenzene (C 12 H 10 N2), β-carotene (C 40 H 56 ), at least one of luteolin.

8. The method for preparing a resin capable of accurately identifying a characteristic spectrum according to claim 1, wherein: Step 6: Recover the plastic material to be identified, compare the spectral information group of the known spectral feature database, and use the corresponding spectrometer to identify whether the plastic material to be identified contains the customized substance Y, and then determine whether the plastic material to be identified is the customized plastic material Z.

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