CN111721737A - Characterization method for researching interaction mechanism of slow-release essence nanoparticles and paper - Google Patents
Characterization method for researching interaction mechanism of slow-release essence nanoparticles and paper Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/20008—Constructional details of analysers, e.g. characterised by X-ray source, detector or optical system; Accessories therefor; Preparing specimens therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/207—Diffractometry using detectors, e.g. using a probe in a central position and one or more displaceable detectors in circumferential positions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
- G01N2021/3572—Preparation of samples, e.g. salt matrices
Abstract
The invention discloses a characterization method for researching an interaction mechanism of slow-release essence nanoparticles and paper, which is characterized by comprising the following steps of firstly preparing paper adsorbing the slow-release essence nanoparticles; taking blank paper as a control group, and characterizing the paper adsorbing the slow-release essence nanoparticles and the blank paper by adopting a Fourier transform attenuated total reflection infrared spectroscopy and an X-ray diffraction technology; and extracting corresponding acting force parameters according to the measurement curve obtained by characterization so as to obtain an interface interaction mechanism between the aromatic nanoparticles and the paper. The invention can more effectively analyze and design interfaces of different materials and provides a new means for researching the mechanical properties of the interfaces between particles and paper in the aromatic paper.
Description
Technical Field
The invention relates to a characterization method of an interfacial interaction force characteristic of a fiber-based surface coating, which is based on Fourier transform attenuated total reflection infrared spectroscopy and an X-ray diffraction technology and belongs to the technical field of interfacial mechanical characteristics of paper fibers and copolymer nanoparticles.
Background
Paper made of cellulose extracted from plants has been a cultural carrier since the invention of 2000. Are widely used in various fields such as: packaging, reading and writing, cleaning, decoration and the like are one of important necessities in human life. And is also an important industrial resource, involving electrical insulators, medical devices, filters, and the like, and its applications are also continuously expanding.
With the economic development and the continuous improvement of the living standard of people, cellulose paper has more and more attention as a multifunctional material development platform in recent years due to good flexibility, sustainability, biodegradability, low cost and good modification performance. For example, the application of small molecules or inorganic particles to the surface of fibers is becoming increasingly important. The coating technology achieves remarkable achievement in the aspects of coating materials, preparation methods, performance characterization, technical means and the like. The nano coating has excellent mechanical properties and good cost performance advantage and shows wide application prospect in the aspect of material surface protection. The coating technology is utilized to improve the surface performance of the material, and the paper is endowed with magnetism, super-hydrophobicity, antibacterial property, aromatic paper and the like, thereby realizing various applications.
The surface interface characteristics of the fiber, especially the physicochemical characteristics of the interface action between the paper fiber and the polymer nanoparticles are fully understood, and the method has important significance for the change research of the microstructure in the manufactured aromatic paper. Under the premise that the formula is determined, the interface combination condition between the aromatic nanoparticles and the paper fibers becomes a key factor influencing the research on mechanical properties. Therefore, through the research on the behavior of the paper fiber interface bonding action, the microstructure of the adsorption of the nanoparticles and the fiber can be known, and the essence of the interface bonding phenomenon can be deeply known, so that the performance of the material is enhanced, and a foundation is laid for the surface mechanics research of the aromatic wallpaper.
At present, the methods for representing the interfacial force among different components in the cellulose paper mainly comprise the following steps: raman spectroscopy and fourier transform infrared. The Raman spectroscopy is an analysis method which is mainly used for analyzing molecular vibration and rotation information obtained by scattering spectra of different incident light frequencies and applied to molecular structure analysis research. The Fourier transform infrared method is mainly used for estimating the type and the structure of a compound by irradiating a spectrum reflecting the component characteristics of a sample through an infrared light source, but the method represents the integral interface acting force after potassium bromide tabletting, so that the test result is apparent interface acting force data. Although the two methods represent the mechanical characteristics of the paper and the nanoparticle interface to a certain extent, a new representation technology needs to be explored to realize the direct and qualitative representation of the interface acting force between the components and obtain the mechanical characteristics of the interface acting force between the paper and the nanoparticle component, so that references are provided for the researches such as evaluation and improvement of the mechanical properties of the paper interface.
The Fourier transform attenuated total reflection infrared spectroscopy and the X-ray diffraction technology are mainly used for researching the interaction force between the surfaces of paper, cotton fabrics and hybrid membranes. According to the characteristics of surface adsorption particles, various particle-matrix interaction forces can be measured, and the interaction between additive particles and a matrix in a polymer composite material is reported, such as chitosan-cotton fibers, and the chitosan-cotton fibers also have application in the research of textiles, electronic science, paper making and the like. But no relevant report is found in the study of the interfacial mechanical properties of the related substances on the surface of the paper. The invention provides a characterization method of the interface force type between the slow-release essence nanoparticles and paper based on Fourier transform attenuated total reflection infrared spectroscopy and X-ray diffraction technology, which is characterized in that specific particles are modified on the paper, and then the mechanical properties of surface components are obtained by using the characterization technology, so that the extraction of characteristic information of different local areas of various functional materials is realized, the interaction force of the slow-release essence-paper interface is further known, and a new means is provided for the research of the mechanical properties of the aromatic paper interface.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the characterization method of the interface force type of the paper and the slow-release essence nanoparticles by the Fourier transform attenuated total reflection infrared spectroscopy and the X-ray diffraction technology is provided, and a new technical means is provided for the research of the mechanical property of the aromatic paper interface.
In order to solve the technical problems, the invention provides a characterization method for researching an interaction mechanism of slow-release essence nanoparticles and paper, which is characterized by comprising the following steps of:
step 1): preparing paper adsorbing the slow-release essence nanoparticles: adding water and 0.5g of Tween 80 into a heat-resistant glass reactor, stirring for 10 minutes, fully mixing 2g of jasmine essence and 2g of methyl methacrylate, adding into the reactor, and setting the shearing time to be 10 min; magnetically stirring the mixture for 180 minutes at 75 ℃ and 1000rpm to prepare an MMA solution; adding 0.15g of azoisobutyronitrile into the MMA solution to prepare 100g of PMMANP emulsion; dipping the cut paper in PMMA NP emulsion, magnetically stirring for 2 hours at the rotating speed of 500r/min, and freeze-drying for 48 hours for later use;
step 2): taking blank paper as a control group, and characterizing the paper adsorbing the slow-release essence nanoparticles and the blank paper by adopting a Fourier transform attenuated total reflection infrared spectroscopy and an X-ray diffraction technology;
step 3): extracting corresponding acting force parameters according to the measuring curve obtained by the characterization in the step 2), thereby obtaining an interface interaction mechanism between the aromatic nanoparticles and the paper.
Preferably, the size of the paper in the step 1) is 5cm × 5 cm.
Preferably, the particle size of the PMMA NP nano emulsion in the step 1) is 200 nm.
Preferably, the mass concentration of the PMMA NP emulsion prepared in the step 1) is diluted to be 20-100% before the PMMA NP emulsion is impregnated into paper.
Compared with the prior art, the invention has the following beneficial effects:
the method disclosed by the invention is based on Fourier transform attenuated total reflection infrared spectroscopy and an X-ray diffraction technology, and realizes the extraction of mechanical characteristic information of paper and slow-release essence nanoparticles by spectral scanning, thereby realizing the direct and qualitative characterization of the interface acting force between the paper and the particle components. The method has the advantages of simple process, simple and convenient operation and strong practicability. The obtained mechanical parameters can also provide reference for the research such as the interface mechanical property evaluation of the paper fiber
Drawings
FIG. 1 is an infrared spectrum of paper and blank paper treated with different mass fractions of slow-release essence nanoparticles;
FIG. 2 is an X-ray diffraction spectrum of paper and blank paper treated by different mass fractions of the slow-release essence.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
Examples
(1) 95.35g of water and 0.5g of Tween 80 were put into a heat-resistant glass reactor, and stirred for 10 minutes. 2g of jasmine essence and 2g of methyl methacrylate are fully mixed and then added into a reactor, and the high-speed shearing time is set to be 10 min. Magnetically stirring the mixture for 180 minutes at 75 ℃ and 1000rpm to obtain an MMA solution; to the MMA solution, 0.15g of azoisobutyronitrile was added, and the weight ratio of the mass of water to the sum of the masses of the other substances was 100. PMMA NP emulsion is prepared.
The paper of 5cm multiplied by 5cm is dipped in PMMA NP latex with different mass fractions of 20 percent, 40 percent, 60 percent, 80 percent and 100 percent respectively, the dipping condition is set as 500r/min, and the adsorption time is set as 2 h.
(2) And (3) measuring the aromatic paper obtained in the step (1) by a Fourier transform attenuated total reflection infrared spectrum and an X-ray diffractometer. And obtaining a spectrogram curve, and extracting corresponding acting force parameters so as to obtain the acting force type between the slow-release essence nanoparticles and the paper.
A detection instrument: fourier transform attenuated total reflection infrared spectrometer: and (3) installing an ATR-OMNI sampler, setting experiment parameters, placing the prepared sample to be tested on the Broussonetia crystal, and pressing the sample by rotating a fixing button of the OMNI sampler In 10. X-ray diffraction: d/max 2200PC, firstly setting corresponding experiment parameters, selecting an applicable sample plate placing area of the prepared sample within a range of 5-12mm from the vertical surface of the sample table, simultaneously ensuring that the surface of the sample falls on the axis center of the goniometer, and closing an instrument door.
The result of Fourier transform attenuated total reflection infrared spectrum scanning on the obtained slow-release essence nanoparticle modified paper is shown in figure 1, and the acting force type between the obtained slow-release essence nanoparticles and the paper is a hydrogen bond by extracting acting force characteristic parameters from a spectrogram curve.
The result of performing X-ray diffraction spectrum scanning on the paper modified by the slow-release essence nanoparticles prepared in the embodiment is shown in fig. 2, and the result obtained by extracting characteristic parameters from a spectrogram curve is that the degree of crystallinity among paper fibers is reduced, which indicates that hydrogen bonds among paper fiber molecules are broken, and thus the paper-PMMA hydrogen bonds are formed.
TABLE 1 degree of crystallinity of nanoparticle-modified paper at different mass concentrations
Claims (4)
1. A characterization method for researching an interaction mechanism of a slow-release essence nanoparticle and paper is characterized by comprising the following steps:
step 1): preparing paper adsorbing the slow-release essence nanoparticles: adding 95.35g of water and 0.5g of Tween 80 into a heat-resistant glass reactor, stirring for 10 minutes, fully mixing 2g of jasmine essence and 2g of methyl methacrylate, adding into the reactor, and setting the shearing time to be 10 min; magnetically stirring the mixture for 180 minutes at 75 ℃ and 1000rpm to prepare an MMA solution, and adding 0.15g of azoisobutyronitrile into the MMA solution to prepare 100g of PMMA NP emulsion; dipping the cut paper in PMMA NP emulsion, magnetically stirring for 2 hours at the rotating speed of 500r/min, and freeze-drying for 48 hours for later use;
step 2): taking blank paper as a control group, and characterizing the paper adsorbing the slow-release essence nanoparticles and the blank paper by adopting a Fourier transform attenuated total reflection infrared spectroscopy and an X-ray diffraction technology;
step 3): extracting corresponding acting force parameters according to the measuring curve obtained by the characterization in the step 2), thereby obtaining an interface interaction mechanism between the aromatic nanoparticles and the paper.
2. The characterization method for researching the interaction mechanism of the slow-release flavor nanoparticles and the paper as claimed in claim 1, wherein the paper in the step 1) has a specification of 5cm x 5 cm.
3. The characterization method for researching the interaction mechanism of the slow-release flavor nanoparticles and paper as claimed in claim 1, wherein the particle size of the PMMA NP nanoemulsion in the step 1) is 200 nm.
4. The characterization method for researching the interaction mechanism of the slow-release essence nanoparticles and the paper as claimed in claim 1, wherein the dilution of the mass concentration of the PMMA NP emulsion prepared in step 1) before dipping the paper is 20-100%.
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