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Pretreatment method of fiber sample

A sample and fiber technology, which is applied in the field of pretreatment of fiber samples, can solve the problems of digestion tank burning and breakdown digestion tank, etc., and achieve the effect of reducing process loss, simplifying operation steps, and reducing impurities in the ashing process

Pending Publication Date: 2021-12-17
山西钢科碳材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for pretreatment of fiber samples (precursor or carbon fiber samples) using microwave digestion, avoiding breakdown of the digestion tank or burning of the digestion tank during the digestion process, and solving the problem of microwave Difficulties in the application of digestion method in the pretreatment of raw silk and carbon fiber samples

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  • Pretreatment method of fiber sample
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  • Pretreatment method of fiber sample

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Embodiment 1

[0036] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the application according to the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. . In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0037]For raw silk samples and carbon fiber samples, when measuring the element content, the fiber samples need to be pretreated first. However, in the prior art, the ashing method is generally used for sample pretreatment, but it has disadvantages such as time-consuming and cumbersome steps. The microwave digestion method is an emerging sample pretreatment tech...

Embodiment 2

[0082] This embodiment is used to perform pretreatment on carbon fiber samples, wherein the sample solution obtained after pretreatment is used for element content determination (ICP-AES method). Specifically include the following steps:

[0083] 1) Fiber sample preparation steps: Cut 3 meters of carbon fiber from 1# and 2# samples respectively, fold them into 10cm long, put them on a tray, place them in a 110°C oven for dehydration and drying for 1 hour, and cool them down to room temperature in a desiccator. Cut into chopped strands of about 3mm to obtain 1# fiber sample and 2# fiber sample.

[0084] 2) Sampling and sample addition steps: Weigh two samples of 0.1001g and 0.1001g from the 1# fiber sample, and weigh two samples of 0.1001g and 0.1002g from the 2# fiber sample.

[0085] Use weighing paper to put the weighed 4 samples into the 4 digestion tanks of the microwave digestion instrument respectively. figure 1 shown).

[0086] 3) Acid treatment step: add 10mL nitric...

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Abstract

The invention discloses a pretreatment method of a fiber sample, which adopts a microwave digestion method to carry out pretreatment on a precursor or carbon fiber sample, and comprises the following steps of: a fiber sample preparation step, a sampling and sample adding step, an acid adding treatment step, a digestion treatment step, an acid removing treatment step and a constant volume step. In the sampling and sample adding step, when a sample is added, the sample is conveyed to the bottom part of a digestion tank by adopting a sample adding device so as to ensure that other positions of the digestion tank are not stained with the fiber sample. By adopting the pretreatment method of the fiber sample, a clear and bright pretreated sample solution can be obtained. The pretreatment method solves the problem that when the microwave digestion method is adopted for pretreatment of the fiber sample, the digestion tank is prone to break down due to the fact that fibers are hung on the wall. Besides, compared with the features of long time consumption, tedious steps and the like of sample pretreatment of the precursor and the carbon fiber by using an ashing method, the pretreatment method has the advantages of short time consumption, simple steps, high accuracy, high reproducibility and the like, and the detection precision and the detection efficiency are improved.

Description

technical field [0001] The invention relates to a pretreatment method for fiber samples, and belongs to the technical field of element content detection of raw silk and carbon fibers. Background technique [0002] At present, the detection method of metal ions and other elements in the raw silk (also known as carbon fiber precursor) and carbon fiber generally adopts the ICP-AES method, and the pretreatment method of the samples generally adopts the ashing method. The ashing method generally needs to go through the steps of ashing, volatilizing silicon, dissolving and constant volume. The operation steps are many and cumbersome. Improper operation of each process will affect the accuracy and reproducibility of the test results. For example: the ashing process is prone to errors due to human factors, and improper control of ashing conditions will also cause the loss of certain elements. In addition, the ashing process generally takes at least 15 hours. Therefore, the sample p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/44G01N21/73
CPCG01N1/28G01N1/44G01N21/73
Inventor 雷爱民李旭东严华周国十刘纳新张瑞婷
Owner 山西钢科碳材料有限公司