Titanium dioxide content measurement method

A technology of titanium dioxide and test method, which is applied in the preparation of test samples and the measurement of color/spectral properties, etc., can solve problems such as difficulty in testing titanium dioxide, and achieve the effect of complete digestion

Inactive Publication Date: 2014-09-10
TAICANG ZHENHUI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These means are not available in the test method of titanium dioxide content in GB / T14190, and without these means, it is very difficult to realize the test of titanium dioxide in functional polyester

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of titanium dioxide content test method

[0041] The sample is: phosphorus-based flame-retardant polyester chips

[0042] The test includes the following steps: (the purity of the reagents used are all analytical grades; the solutions used (%) are expressed as mass fractions; the laboratory water should meet the specifications of third-grade water in GB / T6682).

[0043] 1. Solution preparation

[0044] 1.1 Sulfuric acid solution (5mol / L): Pour 280ml of concentrated sulfuric acid into 1L of water, mix well and cool to room temperature.

[0045] 1.2 Hydrogen peroxide solution (3%): inject 30ml of concentrated hydrogen peroxide into 100ml of water, and mix well.

[0046] 1.3 Mixed acid: Add 300ml of concentrated hydrochloric acid and 100ml of concentrated nitric acid to 450ml of water and mix well.

[0047] 1.4 Ascorbic acid solution (100g / L): Weigh 25g of ascorbic acid and dissolve it in 250mL of water.

[0048] 1.5 Titanium standard working solution (1mg / mL): ...

Embodiment 2

[0065] A method for testing titanium dioxide content as described in Example 1, the difference is that the sample is a far-infrared polyester DTY filament. Test steps 1 and 2 are the same, and step 3 starts as follows:

[0066] 3.1 Polyester DTY filament generally has an oil content higher than 2%. It needs to be degreased with soap solution and then dried. The filament sample should be cut into a line segment with a length of about 1cm.

[0067] 3.2 Accurately weigh two samples of far-infrared polyester DTY filaments that have been processed and cut into line segments, the masses are: M 1 = 0.2302 grams, M 2 =0.2467 g, in a 250 mL Erlenmeyer flask, add 10 mL of 98% concentrated sulfuric acid and 5 mL of 30% hydrogen peroxide, and mix well. Place the Erlenmeyer flask on a temperature-controlled electric heating plate in a fume hood, slowly heat until the solution boils, and continue to heat for 10 minutes. When it is almost room temperature, add 5-8g of ammonium sulfate and ...

Embodiment 3

[0076] A titanium dioxide content test method as described in Example 1, the difference is that the sample is a luminous polyester masterbatch. 3.1 of test step 1, step 2, and step 3 are the same, and step 3.2 starts as follows:

[0077] 3.2 Accurately weigh two samples of luminous polyester masterbatch that have been processed into pieces, the masses are: M 1 = 0.2555 grams, M 2=0.2470 g, in a 250 mL Erlenmeyer flask, add 10 mL of 98% concentrated sulfuric acid and 5 mL of 30% hydrogen peroxide, and mix well. Place the Erlenmeyer flask on a temperature-controlled electric heating plate in a fume hood, slowly heat until the solution boils, and continue to heat for 10 minutes. When it is almost room temperature, add 5-8g of ammonium sulfate and continue to heat and digest. If the solution does not decolorize, You can add 5mL of 30% hydrogen peroxide in batches and cook until the solution becomes colorless and transparent. When there is a small amount of white smoke, take it o...

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Abstract

The invention relates to a titanium dioxide content measurement method. The titanium dioxide content measurement method comprises the following steps: (1) digesting a polyester sample by a wet-acid soluble decomposition system; (2) reacting a dilute acid mixture of hydrochloric acid and nitric acid with non-titanium metal salt in a sample to obtain a digestion sample liquid; (3) masking metal ions, which interfere with a main reaction, by ascorbic acid, and preparing a dilute solution to be measured with the absorbance value in the range of 0.2 to 0.8 by taking hydrogen peroxide as a color developing agent; (4) measuring the absorbance value A of the dilute solution to be measured, and measuring the blank absorbance value A0; (5) preparing standard solutions of titanium with a series of ladder concentration, measuring the absorbance values of the standard solutions, and then drawing a standard working curve Y=KX by taking the difference values of the measured absorbance values and the blank absorbance value as horizontal coordinates X and taking the titanium content corresponding to the standard solutions of titanium with a series of ladder concentration as vertical coordinates Y, thereby obtaining the slope value K of the standard working curve; and (6) calculating the percentage of titanium dioxide TiO2. By the measurement method disclosed by the invention, the content of titanium dioxide in polyester can be measured accurately.

Description

technical field [0001] The invention belongs to the technical field of inorganic matter content detection, and relates to a method for testing titanium dioxide content, in particular to a method for detecting titanium dioxide in functional polyester (PET) and its masterbatch and fiber, especially to functional polyester, such as : Far-infrared, flame retardant, color, anti-ultraviolet, antibacterial, luminous, carbon or coffee charcoal (deodorization), cool feeling polyester and its masterbatch and detection method of titanium dioxide in fibers, which belong to inorganic in polyester (PET) The technical field of detection of substance content. Background technique [0002] The main application of polyester (PET, commonly known as: polyester) is to replace cotton, and make it into fiber or yarn to weave clothes or home textiles. Polyester fiber molecules are neatly arranged, and the surface of the fiber is smooth, but the luster is harsh. To overcome this shortcoming, mattin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N1/28
Inventor 翟昊顾振其
Owner TAICANG ZHENHUI CHEM FIBER
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