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A rapid method for determination of flame retardant content in inorganic flame retardant cellulose fibers

A cellulose fiber and inorganic flame retardant technology, which is applied in the field of rapid testing of flame retardant content, can solve the problems of increased chemical use, poor method versatility, and chemical discharge, and achieve resource saving, small sample size, and analysis speed fast effect

Active Publication Date: 2022-07-19
潍坊欣龙生物材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method shortens the test time of samples to a certain extent, it increases the use of chemicals, especially the use of highly corrosive concentrated sulfuric acid. There are certain safety hazards in the sample digestion operation, and the discharge of chemicals will also bring environmental pollution. Pollution; In addition, this method needs to formulate corresponding chemical analysis methods according to the types of inorganic flame retardants in flame-retardant fibers, and the method has poor versatility

Method used

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  • A rapid method for determination of flame retardant content in inorganic flame retardant cellulose fibers
  • A rapid method for determination of flame retardant content in inorganic flame retardant cellulose fibers
  • A rapid method for determination of flame retardant content in inorganic flame retardant cellulose fibers

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Embodiment 1

[0069] Example 1 Ambrose flame retardant cellulose fiber (the main flame retardant component is SiO 2 ) rapid determination of flame retardant content

[0070] The implementation process of this embodiment is as follows:

[0071] (1) Collect representative fiber samples with different flame retardant contents: collect 10 to 15 fiber samples at different time points in normal production batches and production transition batches, and the quantity of each sample is about 100g. Store in a sealed plastic bag for testing. The flame retardant content of the sample is between 10% and 35%, and the distribution is as uniform as possible;

[0072] (2) Determination of the flame retardant content of each sample by burning weighing method: according to the burning residue test method specified in Appendix A of FZ / T 52013-2011 "Inorganic Flame Retardant Viscose Staple Fiber", the flame retardant of each sample is determined. agent content;

[0073] (3) Determination of the NMR FID signa...

Embodiment 2

[0126] Example 2 Rapid determination of flame retardant content of samples at non-calibrated temperature

[0127] The sample with known flame retardant content (sample weight is about 1g) is adjusted by a water bath or other constant temperature equipment, and the working curve and operation method established in Example 1 are used to obtain sample temperatures of 17°C and 20°C in turn. , 25°C, 28°C, 30°C, 34°C, and 38°C measurement results. Take the measured value X at different temperatures T is the ordinate, and the temperature T is the abscissa, draw the curve of the measured value of the flame retardant content with the temperature of the sample, such as Image 6 shown. It can be seen that in the temperature range of 15 ℃ ~ 40 ℃, the measured value of the flame retardant content of the sample increases with the increase of temperature, and the two are approximately in a linear relationship, and the relationship can be expressed as:

[0128] X T -X 0 =k 6 (T-T 0 ) (...

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Abstract

The invention provides a rapid determination method for the content of the flame retardant in the inorganic flame retardant cellulose fiber, which adopts a low-field pulse nuclear magnetic resonance method to rapidly determine the content of the flame retardant in the inorganic flame retardant cellulose fiber. The invention has the advantages of simple operation, short test time, high precision, good stability, accurate and reliable measurement results, a small amount of samples required for the test, and no damage during the test. The morphological structure of the sample, the sample can be recycled and reused, which is conducive to saving resources; the determination method of the invention is fast, accurate and reproducible, and can simultaneously determine the moisture and flame retardant content of an unknown flame retardant fiber sample at one time. The data obtained by the laboratory routine measurement method is in good agreement, and can meet the needs of rapid analysis and detection of the flame retardant content of flame retardant cellulose fiber products, and has good practicability.

Description

technical field [0001] The invention belongs to the technical field of fiber analysis and testing, relates to a rapid test method for the content of flame retardants of inorganic flame retardant cellulose fibers, and in particular relates to a rapid determination of the flame retardant content of inorganic flame retardant cellulose fibers based on a low-field pulse nuclear magnetic resonance method method of dosage. Background technique [0002] In recent years, fires caused by textiles have been increasing in countries all over the world, and the results of investigations on fatal accidents caused by fires show that fires caused by interior decorations and textiles are the first. In order to prevent fire, the production of flame retardant fibers has attracted more and more attention, and various flame retardant fibers have also emerged. Among them, flame retardant cellulose fibers have moisture absorption and ventilation, comfortable wearing, good heat resistance, and no T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N24/08
Inventor 娄善好王文华刘长军张玉梅颜晶
Owner 潍坊欣龙生物材料有限公司
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