Method for detecting UV (ultraviolet) light stability of special titanium dioxide for paper making

A light stability and detection method technology, applied in the preparation of test samples, measuring devices, weather resistance/light resistance/corrosion resistance, etc., can solve the problems of high detection cost, long detection cycle, large investment, etc., and achieve precision Good, low detection cost, direct monitoring effect

Active Publication Date: 2013-04-24
中信钛业股份有限公司
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AI Technical Summary

Problems solved by technology

However, the detection cost of this method is high and the detection period is long; when titanium dioxide manufacturers produce paper-making special titanium dioxide, they use the method of preparing paper and then testing the UV light stability, which still has the problems of large investment and lack of technical support for papermaking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Press 5g of titanium dioxide, 5g of calcium carbonate, and 20g of linseed oil with a spatula to grind and disperse evenly to obtain a mixed slurry;

[0018] 2. Scrape 0.5g of the mixed slurry with a 250μm wet film maker to make three sets of wet films, and sandwich the wet films with glass sheets with the same light transmittance to make three sets of films;

[0019] 3. Use a spectrophotometer to detect the CIEL*a*b* of the three groups of membranes respectively;

[0020] 4. Use the three sets of diaphragms with a strength of 800μw / cm 2 The ultraviolet light is uniformly irradiated for 3 hours, and the CIE L*a*b* is respectively measured with a spectrophotometer;

[0021] 5. Calculate the CIE L*a*b* of the three groups of membranes before and after ultraviolet light irradiation. The test results of the parallel sample ⊿E, that is, the UV light resistance of titanium dioxide, are 0.35, 0.40, and 0.38, respectively. Parallel detection The difference between the resul...

Embodiment 2

[0023] 1. Grind and disperse 2g titanium dioxide, 2g manganese carbonate, and 10g castor oil with a flat grinder to obtain a mixed slurry;

[0024] 2. Make a group of 0.2g of the mixed slurry, place them in the middle of three glass sheets, and then press the glass sheets with the same light transmittance on the mixed slurry, and press the mixed slurry into a film by hand;

[0025] 3. Use a spectrophotometer to detect the CIEL*a*b* of the three groups of membranes respectively;

[0026] 4. Use the three sets of diaphragms with a strength of 1000 μw / cm 2 The ultraviolet light is uniformly irradiated for 2 hours, and the CIE L*a*b* is detected respectively with a spectrophotometer;

[0027] 5. Calculate the CIE L*a*b* of the three groups of membranes before and after ultraviolet light irradiation. The test results of the parallel sample ⊿E, that is, the UV light resistance of titanium dioxide, are 0.35, 0.40, and 0.38, respectively. Parallel detection The difference between th...

Embodiment 3

[0029] 1. Grind and disperse 10g of titanium dioxide, 20g of lead carbonate, and 30g of glycerin with a small three-roller machine to obtain a mixed slurry;

[0030] 2. Put 1.0g of the mixed slurry into a group, place them in the middle of three glass sheets, and then press the glass sheets with the same light transmittance on the mixed slurry, and press the mixed slurry into a film by hand;

[0031] 3. Use the spectrophotometer to detect the CIEL*a*b* of the three groups of diaphragms;

[0032] 4. Use the three sets of diaphragms with a strength of 900 μw / cm 2 The ultraviolet light is uniformly irradiated for 6 hours, and the CIE L*a*b* is detected respectively with a spectrophotometer;

[0033] 5. Calculate the CIE L*a*b* of the three groups of membranes before and after ultraviolet light irradiation. The test results of the parallel sample ⊿E, that is, the UV light resistance of titanium dioxide, are 0.35, 0.40, and 0.38, respectively. Parallel detection The difference be...

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Abstract

The invention relates to a method for detecting the UV (ultraviolet) light stability of special titanium dioxide for paper making. The method comprises the following steps that the titanium dioxide and carbonate are uniformly dispersed into linseed oil, castor oil, glycerol or petrolatum oil to obtain mixed size which is prepared into a wet film, and the wet film is clamped in the middle through transparent glass sheets to form a film sheet; the CIEL*a*b* of the film sheet is detected through a spectral color photometer; the UV light used by the film sheet is uniformly illuminated, and the film sheet is put into the spectral color photometer to detect the CIEL*a*b*; according to the detected CIEL*a*b* before and after illumination, the triangle E is calculated by the spectral color photometer, namely the capacity of the titanium dioxide to resist the UV light; parallel samples are detected; and when the difference of the parallel detection results is less than 0.15 and the average value of the parallel sample detection results is less than 0.5, the UV light stability of the titanium dioxide conforms to the requirement of the special titanium dioxide for paper making. The method manufactures the samples into a wet film mode, the UV light stability of the titanium dioxide can be rapidly and directly monitored, the precision of the detection results is good, and the detection cost is low.

Description

technical field [0001] The invention relates to a method for detecting UV light stability of titanium dioxide special for papermaking. Background technique [0002] At present, most domestic titanium dioxide manufacturers use the sulfuric acid method to produce paper-making titanium dioxide, resulting in the whiteness, brightness and other indicators of the product cannot meet the requirements of high-grade decorative base paper, and general-purpose titanium dioxide can meet the requirements in the general papermaking field, so High-grade paper-making special titanium dioxide is very rare. In order to identify the UV light stability of the added titanium dioxide, paper manufacturers usually test the UV light resistance of the paper after it is made into paper. However, the detection cost of this method is high and the detection cycle is long; when titanium dioxide manufacturers produce paper-making titanium dioxide, they use the method of preparing paper and then testing t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N1/28
Inventor 马英华姜志刚朱红岩金东洲
Owner 中信钛业股份有限公司
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