CN104849202A - Method for quickly detecting light resistance of titanium dioxide for papermaking - Google Patents
Method for quickly detecting light resistance of titanium dioxide for papermaking Download PDFInfo
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- CN104849202A CN104849202A CN201510290721.5A CN201510290721A CN104849202A CN 104849202 A CN104849202 A CN 104849202A CN 201510290721 A CN201510290721 A CN 201510290721A CN 104849202 A CN104849202 A CN 104849202A
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- titanium dioxide
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Abstract
The invention discloses a method for quickly detecting the light resistance of titanium dioxide for papermaking. The method comprises the following steps: uniformly dispersing titanium dioxide and resin into water to obtain mixed slurry after uniform stirring, coating a transparent glass plate with the mixed slurry through a wet film preparation device, drying in a drying box with the temperature of 60 DEG C for 30min or naturally airing to prepare a film, and testing and irradiating by a color difference meter to obtain a CIEL*a*b* initial value of the front film; putting the film into an ultraviolet aging box for irradiation, and testing and irradiating by the color difference meter to obtain a CIEL*a*b* initial value of the rear film; calculating color difference change deltaE according to the irradiated front and rear CIEL*a*b*, wherein the color difference change deltaE is the light resistance of titanium dioxide. According to the method for detecting the light resistance of the titanium dioxide, the detection period can be effectively shortened, and the detection result is accurate and reliable.
Description
Technical field
The present invention relates to titanium dioxide method for testing performance field, be specifically related to a kind of titanium dioxide for papermaking photostability method for quick.
Background technology
Titanium dioxide is a kind of very important Chinese white, is widely used in the industries such as coating, plastics, papermaking, ink.Papermaking is the third-largest user of titanium dioxide.
In field of papermaking, titanium dioxide is as the primary raw material producing decorating base paper, and the quality of its index to product plays decisive influence.Because titanium dioxide surface also exists many photoactivation point, under UV-irradiation, oxonium ion on its lattice can lose electronics and change the oxygen atom with oxidisability into, if these oxygen atoms enter into the resin system of facing paper, molecular resin can be made to rupture, degrade, cause facing paper variable color, thus affect the photostability of facing paper.
So the photostability of papermaking producer to titanium dioxide has higher requirements.Titanium dioxide, in order to differentiate the photostability of added titanium dioxide, is first made pattern by current manufacturer usually, then adds melamine dipping solution and be pressed into plate, the photostability of test impregnation plate.Titanium dioxide sample is first made pattern due to needs by this detection method, and testing cost is high, sense cycle is long, considerably increases cycle of operation of papermaking and product of pinpointing the problems relatively lags behind, and is unfavorable for the long-term operation in paper mill.And the difference of pattern producing process likely causes titanium dioxide skewness in the sample to which, affects the accuracy of testing result.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of titanium dioxide for papermaking photostability method for quick, reduces testing cost and shortens detection time.
Concrete grammar is, a kind of titanium dioxide for papermaking photostability method for quick, comprises the following steps:
1) Pulp preparation, is distributed to titanium dioxide, resin uniformly in water, obtains mixed slurry after stirring;
2) diaphragm preparation, is applied on transparent glass plate by gained mixed slurry wet film preparing device, dry 30min in 60 DEG C of drying boxes, or makes diaphragm after naturally drying;
3) photostability test, with the CIE L*a*b* initial value of colour difference meter test pre-irradiation diaphragm; Diaphragm is put and irradiates to ultraviolet ray ageing case; The CIE L*a*b* value of rear film is irradiated with colour difference meter test; According to CIE L*a*b* value after pre-irradiation, calculate chromatic aberration △ E, be the photostability of titanium dioxide.Computing formula is:
△E=[(△L*)
2+(△a*)
2+(△b*)
2]
1/2
4) carry out Duplicate Samples detection by step 1)-step 3), more hour, illustrate that accuracy of detection is higher, when parallel sample testing result extreme difference≤0.10, accuracy of detection meets the demands for the extreme difference of parallel sample testing result; When the mean value of the photostability testing result of sample is lower, the photostability of interpret sample is better, and when mean value≤0.80 of parallel sample testing result, the photostability of this titanium dioxide meets titanium dioxide for papermaking requirement.
Further, the titanium dioxide in step 1) and the mass ratio of resin are: 1 ~ 2:1, and the mass ratio of titanium dioxide and water is respectively: 1 ~ 2:1.
Further, the resin in step 1) is melamine resin, melamine formaldehyde resin, methylated melamine formaldehyde resin, butyl alcohol etherified melamine-formaldehyde resin, sulfonated melamine resin, any one or a few mixing in sulfamate melamine resin.
Further, step 2) in the diaphragm thickness made be 150-250 μm.
Further, the aging the temperature inside the box of step 3) middle-ultraviolet lamp is 50 DEG C, and ultraviolet irradiation intensity is 0.76-0.83W/m
2, irradiation time is 3-4 hour.
The beneficial effect of this method is: testing process eliminates paper pattern forming, but directly titanium dioxide and mixed with resin is made diaphragm, detects the photostability of diaphragm, and method is simple, and sense cycle is short, can complete detection in 6 hours, and can carry out batch detection; This method testing process only uses resin and water, reduces testing cost; This method affects the sunproof principle of facing paper according to titanium dioxide, directly sample preparation after titanium dioxide and mixed with resin is detected, avoid the differentia influence testing result of paper pattern forming process, and the resin that the melamine resinoid used must be used when being decorating base paper impregnation, ensure that the accuracy of testing result.
Embodiment
Embodiment 1
1., by 30g titanium dioxide, 30g melamine resin, 30g water, after stirring with homo-mixer, obtain mixed slurry;
2. by gained mixed slurry, 30g is one group, prepares diaphragm with 150 μm of wet film preparing devices respectively on 3 glass plates;
3. made diaphragm is put in the baking oven of 60 ° and dries 30min;
4. the CIEL*a*b* initial value of three diaphragms is tested with colour difference meter;
5. be 50 DEG C by three diaphragms in temperature, intensity is 0.76W/m
2ultraviolet ray ageing case internal radiation 3h, test the CIEL*a*b* value of three diaphragms with colour difference meter;
6. CIEL*a*b* value after three diaphragm pre-irradiations is calculated, the photostability test data of parallel sample △ E and titanium dioxide is respectively: 0.70,0.74,0.72, difference≤0.10 of replicate test result, the mean value of parallel sample testing result are 0.72, and the photostability of this titanium dioxide meets titanium dioxide for papermaking requirement.
Embodiment 2
1., by 40g titanium dioxide, 40g melamine formaldehyde resin, 20g water, after stirring with homo-mixer, obtain mixed slurry;
2. by gained mixed slurry, 33.3g is one group, prepares diaphragm with 250 μm of wet film preparing devices respectively on 3 glass plates;
3. made diaphragm is dried naturally;
4. the CIEL*a*b* value of three diaphragms is tested with colour difference meter;
5. be 50 DEG C by three diaphragms in temperature, intensity is 0.83W/m
2ultraviolet ray ageing case internal radiation 4h, test the CIEL*a*b* value of three diaphragms with colour difference meter;
6. CIEL*a*b* value after three diaphragm pre-irradiations is calculated, the photostability test data of parallel sample △ E and titanium dioxide is respectively: 0.74,0.74,0.72, difference≤0.10 of replicate test result, the mean value of parallel sample testing result are 0.73, and the photostability of this titanium dioxide meets titanium dioxide for papermaking requirement.
Embodiment 3
1., by 40g titanium dioxide, 30g methylated melamine formaldehyde resin, 30g water, after stirring with homo-mixer, obtain mixed slurry;
2. by gained mixed slurry, 33.3g is one group, prepares diaphragm with 250 μm of wet film preparing devices respectively on 3 glass plates;
3. made diaphragm is put in the baking oven of 60 ° and dries 30min;
4. the CIEL*a*b* value of three diaphragms is tested with colour difference meter;
5. be 50 DEG C by three diaphragms in temperature, intensity is 0.80W/m
2ultraviolet ray ageing case internal radiation 4h, test the CIEL*a*b* value of three diaphragms with colour difference meter;
6. CIEL*a*b* value after three diaphragm pre-irradiations is calculated, the photostability test data of parallel sample △ E and titanium dioxide is respectively: 0.75,0.74,0.72, difference≤0.10 of replicate test result, the mean value of parallel sample testing result are 0.74, and the photostability of this titanium dioxide meets titanium dioxide for papermaking requirement.
Claims (5)
1. a titanium dioxide for papermaking photostability method for quick, is characterized in that, comprises the following steps:
1) Pulp preparation, is distributed to titanium dioxide, resin uniformly in water, obtains mixed slurry after stirring;
2) diaphragm preparation, is applied on transparent glass plate by gained mixed slurry wet film preparing device, dry 30min in 60 DEG C of drying boxes, or makes diaphragm after naturally drying;
3) photostability test, with the CIE L*a*b* initial value of colour difference meter test pre-irradiation diaphragm; Diaphragm is put and irradiates to ultraviolet ray ageing case; The CIEL*a*b* value of rear film is irradiated with colour difference meter test; According to CIE L*a*b* value after pre-irradiation, calculate chromatic aberration △ E, be the photostability of titanium dioxide;
4) Analysis of test results, carries out Duplicate Samples detection by step 1)-step 3), and more hour, illustrate that accuracy of detection is higher, when parallel sample testing result extreme difference≤0.10, accuracy of detection meets the demands for the extreme difference of parallel sample testing result; When the mean value of the photostability testing result of sample is lower, the photostability of interpret sample is better, and when mean value≤0.80 of parallel sample testing result, the photostability of this titanium dioxide meets titanium dioxide for papermaking requirement.
2. a kind of titanium dioxide for papermaking photostability method for quick according to claim 1, it is characterized in that: the titanium dioxide in described step 1) and the mass ratio of resin are: 1 ~ 2:1, the mass ratio of titanium dioxide and water is: 1 ~ 2:1.
3. a kind of titanium dioxide for papermaking photostability method for quick according to claim 1 and 2, is characterized in that: described resin is any one or a few mixing in melamine resin, melamine formaldehyde resin, methylated melamine formaldehyde resin, butyl alcohol etherified melamine-formaldehyde resin, sulfonated melamine resin, sulfamate melamine resin.
4. a kind of titanium dioxide for papermaking photostability method for quick according to claim 1, is characterized in that: described step 2) in the diaphragm thickness made be 150-250 μm.
5. a kind of titanium dioxide for papermaking photostability method for quick according to claim 1, is characterized in that: described aging the temperature inside the box of step 3) middle-ultraviolet lamp is 50 DEG C, and ultraviolet irradiation intensity is 0.76-0.83W/m
2, irradiation time is 3-4 hour.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738271A (en) * | 2016-02-24 | 2016-07-06 | 中国科学院宁波材料技术与工程研究所 | Test method for light resistance of titanium dioxide |
| CN107036959A (en) * | 2017-04-14 | 2017-08-11 | 攀钢集团研究院有限公司 | Titanium dioxide method for quickly testing weathering resistance |
| CN109030335A (en) * | 2018-10-26 | 2018-12-18 | 攀钢集团重庆钛业有限公司 | Titanium dioxide primary product weatherability evaluation method |
| CN109443864A (en) * | 2018-10-11 | 2019-03-08 | 攀钢集团重庆钛业有限公司 | The method for making sample of titanium dioxide weatherability detection |
| CN110286026A (en) * | 2019-06-25 | 2019-09-27 | 河南佰利联新材料有限公司 | A kind of titanium dioxide light resistance method for rapidly testing and application |
| CN110286082A (en) * | 2019-06-25 | 2019-09-27 | 河南佰利联新材料有限公司 | A kind of titanium dioxide weatherability method for rapidly testing and application |
| CN110542646A (en) * | 2019-09-24 | 2019-12-06 | 攀钢集团重庆钛业有限公司 | Method for detecting light resistance of papermaking titanium dioxide |
| CN112763068A (en) * | 2020-12-29 | 2021-05-07 | 广西贺州市科隆粉体有限公司 | Method for detecting chromaticity of calcium carbonate powder |
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| TW482816B (en) * | 1997-12-22 | 2002-04-11 | Du Pont | Lightfast titanium dioxide pigments and paper laminates incorporating such pigments |
| CN104198368A (en) * | 2014-09-26 | 2014-12-10 | 攀钢集团钛业有限责任公司 | Quantitative analysis method for melamine decorative paper |
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2015
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| TW482816B (en) * | 1997-12-22 | 2002-04-11 | Du Pont | Lightfast titanium dioxide pigments and paper laminates incorporating such pigments |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738271A (en) * | 2016-02-24 | 2016-07-06 | 中国科学院宁波材料技术与工程研究所 | Test method for light resistance of titanium dioxide |
| CN107036959A (en) * | 2017-04-14 | 2017-08-11 | 攀钢集团研究院有限公司 | Titanium dioxide method for quickly testing weathering resistance |
| CN109443864A (en) * | 2018-10-11 | 2019-03-08 | 攀钢集团重庆钛业有限公司 | The method for making sample of titanium dioxide weatherability detection |
| CN109030335A (en) * | 2018-10-26 | 2018-12-18 | 攀钢集团重庆钛业有限公司 | Titanium dioxide primary product weatherability evaluation method |
| CN110286026A (en) * | 2019-06-25 | 2019-09-27 | 河南佰利联新材料有限公司 | A kind of titanium dioxide light resistance method for rapidly testing and application |
| CN110286082A (en) * | 2019-06-25 | 2019-09-27 | 河南佰利联新材料有限公司 | A kind of titanium dioxide weatherability method for rapidly testing and application |
| CN110286026B (en) * | 2019-06-25 | 2021-12-14 | 河南佰利联新材料有限公司 | Rapid testing method for light resistance of titanium dioxide and application |
| CN110286082B (en) * | 2019-06-25 | 2021-12-14 | 河南佰利联新材料有限公司 | Rapid testing method for weather resistance of titanium dioxide and application |
| CN110542646A (en) * | 2019-09-24 | 2019-12-06 | 攀钢集团重庆钛业有限公司 | Method for detecting light resistance of papermaking titanium dioxide |
| CN112763068A (en) * | 2020-12-29 | 2021-05-07 | 广西贺州市科隆粉体有限公司 | Method for detecting chromaticity of calcium carbonate powder |
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