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Composite material component content determination method and system based on time domain nuclear magnetic resonance

A technology of component content and composite materials, applied in the direction of analysis by nuclear magnetic resonance, material analysis by resonance, and material analysis, etc., can solve the problems of destroying samples and long time required

Pending Publication Date: 2021-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to know the content of each component in the recovered composite material. The existing methods for detecting the content of each component in the composite material are mainly pyrolysis analysis. The high temperature used in this method will destroy the sample. It takes a long time to test

Method used

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  • Composite material component content determination method and system based on time domain nuclear magnetic resonance
  • Composite material component content determination method and system based on time domain nuclear magnetic resonance
  • Composite material component content determination method and system based on time domain nuclear magnetic resonance

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0066] 1. Experimental materials

[0067] A melting index is 2.0 (2.16kg), density is 0.918g / cm 3 Linear low-density polyethylene (LLDPE) was purchased from Sinopec. Analytical pure calcium carbonate particles were purchased from Sinopharm Chemical Reagent Co., Ltd.

[0068] 2. Experimental equipment

[0069] BRUKER BioSpin Corp's mq20 desktop TD-NMR spectrometer (magnetic field strength 0.47T, probe diameter 10mm). Swiss Mettler - Toledo company MS304S electronic balance.

[0070] 3 experimental steps

[0071] a) Prepare 7 composite materials of LLDPE and calcium carbonate with different component contents according to the ratio in Table 1 below, and the total mass of the composite material is about 300 mg. Place the composite in a sample tube.

[0072]

[0073] Table 1b) Parameters such as the center frequency, pulse width, and magnet temperature of the time-domain NMR instrument were calibrated using the standard sample that comes with the instrument.

[0074] c) ...

example 2

[0082] 1 Experimental materials

[0083] A melt index is 5.0 (2.16kg), density is 0.935g / cm 3 Medium density polyethylene (MDPE) was purchased from Sinopec. Analytical pure calcium carbonate particles were purchased from Sinopharm Chemical Reagent Co., Ltd.

[0084] 2 experimental equipment

[0085] BRUKER BioSpin Corp's mq20 desktop TD-NMR spectrometer (magnetic field strength 0.47T, probe diameter 10mm). Swiss Mettler - Toledo company MS304S electronic balance.

[0086] 3 experimental steps

[0087] a) Prepare 7 composite materials of MDPE and calcium carbonate with different component contents according to the ratio in Table 3 below, and the total mass of the composite materials is about 300 mg. Place the composite in a sample tube.

[0088]

[0089]

[0090] Table 3b) Parameters such as the center frequency, pulse width, and magnet temperature of the time-domain NMR instrument were calibrated using the standard sample that comes with the instrument.

[0091] c...

example 3

[0098] 1. Experimental materials

[0099] A melt index is 7.34 (2.16kg), density is 0.956g / cm 3 High-density polyethylene (HDPE) was purchased from Sinopec. Analytical pure calcium carbonate particles were purchased from Sinopharm Chemical Reagent Co., Ltd.

[0100] 2. Experimental equipment

[0101] BRUKER BioSpin Corp's mq20 desktop TD-NMR spectrometer (magnetic field strength 0.47T, probe diameter 10mm). Swiss Mettler - Toledo company MS304S electronic balance.

[0102] 3 experimental steps

[0103] a) Prepare 7 composite materials of HDPE and calcium carbonate with different component contents according to the ratio in Table 5 below, and the total mass of the composite material is about 300 mg. Place the composite in a sample tube.

[0104]

[0105] table 5

[0106] b) Calibrate parameters such as the center frequency, pulse width, and magnet temperature of the time-domain NMR instrument using the standard sample that comes with the instrument.

[0107] c) Place...

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Abstract

The invention provides a composite material component content determination method and system based on time-domain nuclear magnetic resonance. The method comprises the following steps: S1, obtaining nuclear magnetic resonance T2 spectra of n composite materials with known component contents, and building a standard curve of signal intensity and component contents at a specific time point according to the nuclear magnetic resonance T2 spectra; s2, acquiring a nuclear magnetic resonance T2 spectrum of a to-be-detected sample and the signal intensity at the specific time point, and recording the nuclear magnetic resonance T2 spectrum and the signal intensity as first signal intensity; and S3, calculating the component content of the to-be-detected sample according to the standard curve and the first signal intensity. The system comprises a curve establishment unit, a signal intensity acquisition unit and a content calculation unit. The test sample does not need to be damaged, and the test process is short in time consumption and high in accuracy.

Description

technical field [0001] The invention relates to the field of component content detection of composite materials, in particular to a method and system for determining the content of composite material components based on time-domain nuclear magnetic resonance, which can quickly and quantitatively measure the content of inorganic fillers in high molecular polymers. Background technique [0002] Among the various materials currently used by humans, composite materials formed by mixing different types of materials through various methods account for a very large proportion. Among composite materials, composite materials formed by mixing inorganic non-metallic materials and polymer materials are the most widely used type of composite materials. Due to the huge amount of composite materials used, the resulting amount of waste is also very large, so its recycling has naturally become a subject that the industry needs to focus on. One way to reuse composite materials is to separate...

Claims

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Application Information

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IPC IPC(8): G01N24/08
CPCG01N24/082
Inventor 李森
Owner CHINA PETROLEUM & CHEM CORP