In-situ infrared spectrum cell

An infrared spectroscopy, in-situ technology, applied in the measurement of color/spectral characteristics, material analysis by optical means, measurement devices, etc. The effect of experimental efficiency

Active Publication Date: 2014-08-06
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the in-situ infrared spectroscopy cell in the prior art cannot meet the experimental conditions that require simultaneous heating and light irradiation or switching between the two reaction conditions in the process of material aging research.
Moreover, in the prior art, the sample is heated by heating the entire cell body of the in-situ infrared spectroscopy cell, resulting in low heating efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] In this embodiment, the in-situ infrared spectroscopy cell 100 is used to detect volatilization of additives in nitrile rubber under heating conditions. First, put nitrile rubber in the sample boat, then set it in the in-situ infrared spectrum cell 100, heat the nitrile rubber to 150°C, during the heating process, collect the in-situ infrared spectrum cell at regular intervals Gas signal within 100. refer to Figure 5 and Figure 6 , the analysis of the gas signal collected in the in-situ infrared spectrum cell 100 shows that the peak area of ​​the additive increases with the test time, indicating that the additive is continuously volatilized during the heating process of the nitrile rubber.

Embodiment 2

[0065] In this embodiment, the in-situ infrared spectrometer cell 100 is used to detect the carbon dioxide produced by the polyethylene film under light conditions. First, put polyethylene film in the sample boat, then set it in the in-situ infrared spectroscopy cell 100, irradiate the polyethylene film with a 150W xenon lamp through the light port 8, and turn off the xenon lamp after irradiating for 180 minutes, during which time intervals Gas signals in the in-situ infrared spectroscopy cell 100 are collected. refer to Figure 7 and Figure 8 According to the analysis of the gas signal collected in the in-situ infrared spectroscopy cell 100, the polyethylene film produces carbon dioxide under the irradiation of the xenon lamp, and the carbon dioxide is continuously produced with the light, and the generation of the carbon dioxide stops once the light stops.

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Abstract

The invention relates to an in-situ infrared spectrum cell which comprises a closed cell body, wherein an infrared injecting port and an infrared ejecting port are oppositely formed in the cell body and are used for enabling infrared light to be transmitted in and penetrate through the cell body; a lighting port and a sample setting port are oppositely formed in the cell body further; the lighting port is used for enabling the light to be transmitted into the cell body and irradiated to a sample to be detected; a packaging structural body which is used for sealing the sample setting port is further arranged at the sample setting port. The packaging structural body further comprises a heating element and a temperature measuring element, wherein the heating element is used for directly heating the sample to be detected, and the temperature measuring element is used for collecting the temperature of the sample to be detected.

Description

technical field [0001] The invention relates to an in-situ infrared spectrum testing device. Background technique [0002] Polymer materials often suffer from performance degradation (aging) due to the influence of light, heat, oxygen, humidity and other factors during use. The study of their aging behavior is very important for material application and life evaluation. Existing research on aging is carried out in a simulated experimental box, which often can only be carried out under a single or limited factor. The experiment period is long, and it is impossible to observe the changes of materials in situ in real time. Therefore, it is hoped that there will be a suitable experimental environment or equipment to Simulate or even accelerate the aging process as much as possible, and perform real-time and sensitive analysis of material changes. [0003] The in-situ infrared spectroscopy cell is a device that can use in-situ infrared spectroscopy to detect the infrared spectru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/03G01N21/35G01N21/3504
Inventor 刘璇赵皎宏汪意杨睿
Owner TSINGHUA UNIV
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