Qualitative fiber identification method

A fiber and standard sample technology, applied in the field of component analysis, can solve problems such as error-prone, high labor consumption, environmental pollution, etc., achieve high-efficiency fiber detection, reduce inspection costs, and facilitate popularization and application.

Inactive Publication Date: 2014-09-03
GUANGZHOU FIBER PROD TESTING & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently widely used qualitative and quantitative methods have two obvious drawbacks: high manpower consumption and serious environmental pollution
For example: Microscopic determination and manual disassembly require a lot of manpower to operate, and are prone to errors, low efficiency and subjectivity
The chemical dissolution method uses a large amount of high-concentration inorganic acids and bases and organic solvents to produce highly corrosive waste liquid, causing serious pollution to the environment and seriously endangering the health of testing personnel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1 thermogravimetric analysis condition screening

[0044] 1. Screening of environmental atmosphere.

[0045] Select a fiber sample with a composition of 40% polyester fiber and 60% cotton, fully shorten the fiber standard sample to a length of 1-3mm, and mix it evenly, then perform thermogravimetric analysis on the above fiber sample, and the ambient atmosphere is respectively nitrogen Or air, other test conditions are: the initial heating temperature is 50°C, the maximum heating temperature is 800°C, the heating rate is 10°C / min, and the purge air flow is 100mL / min.

[0046] The thermogravimetric (TG) spectrogram and derivative thermogravimetric (DTG) spectrogram obtained by the test are as follows: Figure 1-2 As shown, it can be seen from the spectrum that due to the difference in the ambient atmosphere, in the air atmosphere, because it is an oxidizing atmosphere, there are processes such as oxidative decomposition of organic matter, oxidation of the sam...

Embodiment 2

[0057] A method for qualitative identification of fibers, the operation process is as follows Figure 9 shown, including the following steps. :

[0058] 1) Establish a fiber standard sample database.

[0059] Take different types of fiber standard samples. In this embodiment, the fiber standard samples include: cotton fiber, nylon fiber, acrylic fiber, polyester fiber, high-density polyethylene fiber, and polyphenylene sulfide fiber. Those skilled in the art know that the fiber types in the fiber standard sample database can be selected, added and adjusted according to actual detection needs.

[0060] Use a ball mill or grinder to fully short the fiber standard sample to a length of 1-3 mm, and mix it evenly, and then perform thermogravimetric analysis on the above fiber standard sample. In this embodiment, the selected thermogravimetric analysis test conditions are: Nitrogen atmosphere, the initial heating temperature is 50°C, the maximum heating temperature is 800°C, the ...

Embodiment 3

[0083] In this embodiment, the fiber sample 4 is tested according to the above thermogravimetric analysis conditions and thermogravimetric analysis steps to obtain the thermogravimetric spectrum (TG) of the fiber sample, and calculate the derivative thermogravimetric spectrum (DTG) of the fiber sample , the result is as Figure 19 shown. And the thermogravimetric analysis data shown in Table 4 is obtained by calculating the obtained derivative thermogravimetric spectrum.

[0084] The thermogravimetric analysis data of table 4 fiber sample

[0085] Sample serial number

Decomposition order (n)

Maximum decomposition rate temperature (T d / °C)

Fiber Sample 4

2

(364) / 424

[0086] The thermogravimetric analysis data of the fiber samples obtained above were compared with the decomposition order and maximum decomposition rate temperature in the pre-established fiber standard sample thermogravimetric analysis database. The identification and...

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Abstract

The invention discloses a qualitative fiber identification method which belongs to the technical field of component analysis and comprises the following steps: establishment of a fiber standard sample database, to be more specific, taking different types of fiber standard samples, crushing, mixing evenly, performing thermogravimetric analysis to obtain thermogravimetric analysis data of the different types of fiber standard samples to establish the fiber standard sample database; and identification and determination, to be more specific, crushing and mixing evenly a fiber sample, performing thermogravimetric analysis to obtain thermogravimetric analysis data of the fiber sample, then comparing with data in the fiber standard sample database to determine the type of the fiber sample. The method using thermogravimetric analysis for fiber analysis to obtain the thermogravimetric analysis data, by use of the characteristic that different types of fibers have different thermogravimetric curves, the type of the fiber can be accurately identified, especially, high performance fiber can be identified, and the method has the advantages of high precision, high efficiency and low cost, and can be widely applicable to the fiber type identification.

Description

technical field [0001] The invention relates to the technical field of component analysis, in particular to a method for qualitatively identifying fibers. Background technique [0002] Composition analysis is an essential testing item for textile products. At present, the methods commonly used to qualitatively identify textile fibers include combustion method, microscope method, chemical dissolution method, melting point test method, infrared spectral analysis method, etc. Most of the qualitative identification methods are described in detail in the textile industry standard FZ / T01057 series; The methods commonly used in quantitative analysis include physical methods (microscopic determination, manual resolution) and chemical dissolution methods. These methods are described in detail in the GB / T2910 series. [0003] The currently widely used qualitative and quantitative methods have two obvious disadvantages: large manpower consumption and serious environmental pollution. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
Inventor 罗峻谢剑飞杨欣卉王向钦湛权聂凤明吴淑焕陆佳英
Owner GUANGZHOU FIBER PROD TESTING & RES INST
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