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Quantitative analysis method of cotton and polyacrylonitrile fiber mixture

A polyacrylonitrile fiber, quantitative analysis technology, applied in the direction of analyzing materials, weighing and measuring devices by removing certain components, can solve problems such as toxicity and human injury

Inactive Publication Date: 2020-10-30
JIANGSU ASIA SPACE TESTING TECH SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Cotton fabric refers to fabrics woven with cotton yarn or cotton and cotton chemical fiber blended yarn, and the blending of cotton and polyacrylonitrile fiber can not only make up for their own shortcomings, but also give full play to their respective advantages, so its use The scope is also becoming wider and wider, and the research on the quantitative analysis method of cotton and polyacrylonitrile fiber mixture is also receiving more and more attention. At the same time, the dimethylformamide reagent used in the original standard GBT2910.12-2009 is toxic and harmful to the human body. be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The invention provides a technical scheme: a quantitative analysis method for a mixture of cotton and polyacrylonitrile fibers, comprising the following steps:

[0024] Step 1: Weigh 5g sample of the mixture of cotton and acrylonitrile fiber, put it into a Soxhlet extractor, and extract it with petroleum ether for 1h;

[0025] Step 2: After the petroleum ether volatilizes, soak the sample in cold water for 1 hour, then put it in water at 60°C for 1 hour, then dehydrate and dry it. The ratio of water to sample is 100:1;

[0026] Step 3: Put the sample in an oven and dry it at 102°C for 5 hours;

[0027] Step 4: Put the dried sample into a desiccator to cool, and place the desiccator on the side of the balance, and the cooling time is limited to the sample cooling to room temperature;

[0028] Step 5: After cooling, weigh the sample within 2 minutes, accurate to 0.0002g;

[0029] Step 6: Weigh 1g of the sample and put it into the Erlenmeyer flask, add 150ml of 20% hydro...

Embodiment 2

[0034] The invention provides a technical scheme: a quantitative analysis method for a mixture of cotton and polyacrylonitrile fibers, comprising the following steps:

[0035] Step 1: Weigh 5g sample of the mixture of cotton and acrylonitrile fiber, put it into a Soxhlet extractor, and extract it with petroleum ether for 1h;

[0036] Step 2: After the petroleum ether volatilizes, soak the sample in cold water for 1 hour, then soak it in water at 65°C for 1 hour, then dehydrate and dry it. The ratio of water to sample is 100:1;

[0037] Step 3: Put the sample in an oven and dry it at 105°C for 10 hours;

[0038] Step 4: Put the dried sample into a desiccator to cool, and place the desiccator on the side of the balance, and the cooling time is limited to the sample cooling to room temperature;

[0039] Step 5: After cooling, weigh the sample within 2 minutes, accurate to 0.0002g;

[0040] Step 6: Weigh 1g of the sample and put it into the Erlenmeyer flask, add 150ml of 20% hyd...

Embodiment 3

[0045] The invention provides a technical scheme: a quantitative analysis method for a mixture of cotton and polyacrylonitrile fibers, comprising the following steps:

[0046] Step 1: Weigh 5g sample of the mixture of cotton and acrylonitrile fiber, put it into a Soxhlet extractor, and extract it with petroleum ether for 1h;

[0047] Step 2: After the petroleum ether volatilizes, soak the sample in cold water for 1 hour, then put it in water at 70°C for 1 hour, then dehydrate and dry it. The ratio of water to sample is 100:1;

[0048] Step 3: Put the sample in an oven and dry it at 108°C for 15 hours;

[0049] Step 4: Put the dried sample into a desiccator to cool, and place the desiccator on the side of the balance, and the cooling time is limited to the sample cooling to room temperature;

[0050] Step 5: After cooling, weigh the sample within 2 minutes, accurate to 0.0002g;

[0051] Step 6: Weigh 1g of the sample and put it into the Erlenmeyer flask, add 150ml of 20% hydr...

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Abstract

The invention discloses a quantitative analysis method of a cotton and polyacrylonitrile fiber mixture. The quantitative analysis method comprises the following steps: step 1, weighing a cotton and polyacrylonitrile fiber mixture, and putting the mixture into a Soxhlet extractor for extraction; step 2, immersing a sample in water, performing soaking, dehydrating and airing; step 3, putting the sample into a drying oven for drying; step 4, putting the dried sample into a dryer for cooling; step 5, after cooling, performing weighing; step 6, weighing 1 g of the sample, putting the sample into aconical flask, adding a 20% hydrochloric acid solution, and performing oscillating; step 7, washing residues in a conical flask with a 20% hydrochloric acid solution; and step 8, drying, cooling and weighing the residues. The 20% hydrochloric acid stock solution is adopted for quantitative analysis of the cotton and polyacrylonitrile fiber mixture, the time can be shortened, and the reagent is convenient, accurate, low in toxicity and low in consumption and does not need to be prepared.

Description

technical field [0001] The invention relates to the technical field of textile testing, in particular to a quantitative analysis method for a mixture of cotton and polyacrylonitrile fibers. Background technique [0002] Cotton is an important raw material for the textile industry. Cotton fiber products have the advantages of good moisture absorption and air permeability, softness and warmth. [0003] The performance of polyacrylonitrile fiber is very similar to that of wool, with good elasticity. When it is stretched by 20%, the rebound rate can still maintain 65%. It is fluffy, curly and soft, and its warmth retention is 15% higher than that of wool. The strength is 22.1~48.5cN / tex, which is 1~2.5 times higher than that of wool. Excellent light fastness, one year of exposure in the open air, the strength will only decrease by 20%, and can be made into curtains, curtains, tarpaulins, gun covers, etc. It is resistant to acids, oxidants and general organic solvents, but has...

Claims

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Application Information

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IPC IPC(8): G01N5/04G01N1/28G01N1/34G01N1/40G01N1/44
CPCG01N1/28G01N1/34G01N1/4055G01N1/44G01N5/04G01N2001/4061
Inventor 刘婧朱红娟李明俞丽君李龙梅周文静成莹莹葛培冒颖陈香香夏维盛
Owner JIANGSU ASIA SPACE TESTING TECH SERVICE CO LTD
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