CN111426592A - Method for detecting water absorption capacity of titanium dioxide - Google Patents
Method for detecting water absorption capacity of titanium dioxide Download PDFInfo
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- CN111426592A CN111426592A CN202010270972.8A CN202010270972A CN111426592A CN 111426592 A CN111426592 A CN 111426592A CN 202010270972 A CN202010270972 A CN 202010270972A CN 111426592 A CN111426592 A CN 111426592A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
- G01N5/025—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content for determining moisture content
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Abstract
The invention relates to a method for detecting water absorption capacity of titanium dioxide, belonging to the technical field of detection of titanium dioxide. The method for detecting the water absorption capacity of the titanium dioxide comprises the steps of removing water in the titanium dioxide to be detected, cooling to room temperature, taking a proper amount of titanium dioxide sample, putting the titanium dioxide sample into a beaker, dropwise adding pure water into the beaker, stirring in the same direction until the titanium dioxide sample is fully wetted, and measuring the pure water used at the fully wetted end point. The method for detecting the water absorption capacity of the titanium dioxide can realize the detection of the water absorption capacity of the titanium dioxide, is convenient to operate, has high detection efficiency and high accuracy, and is beneficial to popularization.
Description
Technical Field
The invention belongs to the technical field of titanium dioxide, relates to a detection method of titanium dioxide, and particularly relates to a detection method of water absorption capacity of titanium dioxide.
Background
The water absorption of the pigment refers to the minimum amount of water required to completely wet 100g of pigment. The water absorption of the pigment is measured to determine the minimum amount of water used to grind the pigment. The water absorption capacity is the application performance of the titanium dioxide in the water-based emulsion paint. The water absorption is an important reference data when a formula is determined in an aqueous coating system, the water absorption of pigments in the coating affects a series of application indexes such as PVC value, viscosity, drying speed and the like of the system, and particularly in some coatings with high PVC, the water absorption of the pigments must be strictly controlled when the formula is determined.
The water absorption capacity of titanium dioxide is an important index of the performance of titanium dioxide, and the water dispersion of titanium dioxide is influenced by the water absorption capacity of titanium dioxide. When the titanium dioxide absorbs more moisture, the moisture is combined with the hydroxyl on the surface of the titanium dioxide to weaken the surface electronegativity of the titanium dioxide, so that the high dispersibility of the two phases is weakened, and the dispersion stability is also reduced. However, at present, for the water absorption detection, the water absorption detection of titanium dioxide has no relevant national standard and no systematic detection method.
Disclosure of Invention
The invention provides a method for detecting water absorption capacity of titanium dioxide, which comprises the following steps:
a. Removing water in the titanium dioxide to be detected;
b. B, cooling the titanium dioxide to be detected, of which the moisture is removed in the step a, to room temperature;
c. Taking a proper amount of titanium dioxide samples, and putting the obtained titanium dioxide samples into a beaker;
d. Dropwise adding pure water into the titanium dioxide sample in the beaker, and stirring in the same direction until the titanium dioxide sample is just fully wetted;
e. And d, measuring the pure water amount used for fully wetting the end point of the titanium dioxide sample in the step d.
And c, removing moisture of the titanium dioxide to be detected in the step a in an oven, wherein the temperature of the oven is less than 120 ℃.
And c, cooling the titanium dioxide to be detected in the step b to room temperature in a drying box.
Wherein the value range of M1 in step c is 5-15 g.
And d, when pure water is dripped into the titanium dioxide sample in the step d, a dropper is used for dripping the pure water and stirring the pure water by using a glass rod, and when the glass rod is lifted, the testing end point is the state that the slurry can be dripped.
Wherein the time for completing the step d is controlled between 10 and 15 min.
The invention has the beneficial effects that:
Removing water in the titanium dioxide to be detected to ensure that the titanium dioxide to be detected does not contain water, improving the accuracy of water absorption detection of the titanium dioxide, cooling the titanium dioxide to be detected to room temperature, taking a cooled titanium dioxide sample M1, dropwise adding pure water into the titanium dioxide sample until the titanium dioxide sample is fully wetted, finally measuring the pure water amount M2g used at the fully wetted end point of the titanium dioxide sample, obtaining the water absorption of the titanium dioxide by conversion, wherein the value of M1 is less than 100g, the fully wetted time of the titanium dioxide sample and the used pure water amount are less, and the detection efficiency is obviously improved; the method for detecting the water absorption capacity of the titanium dioxide can realize the detection of the water absorption capacity of the titanium dioxide, is convenient to operate, has high detection efficiency and high accuracy, and is beneficial to popularization.
Detailed Description
The key point of the detection process of the invention is uniform stirring and end point judgment.
When the pure water is dripped into the titanium dioxide sample, a preferable mode is that a dropper is used for dripping the pure water and stirring the pure water and a glass rod at the same time, and the glass rod is stirred in a clockwise or anticlockwise direction until the titanium dioxide sample is just fully wetted.
The invention takes the time when the slurry mixed by the pigment and the water starts to have fluidity as a test end point, namely the time point when the slurry is just fully wet, and for the convenience of detection, the invention takes the time when the glass rod slurry is lifted and can be dripped as a test end point.
The water in the titanium dioxide to be detected is removed in order to ensure and improve the accuracy of water absorption detection of the titanium dioxide, and the water can be removed in an oven at the temperature of less than 120 ℃.
In order to prevent the titanium dioxide to be detected from absorbing moisture in the air, the titanium dioxide to be detected is cooled to room temperature in the drying box.
The titanium dioxide is less than 100g, so that the time for fully wetting the titanium dioxide sample and the used pure water amount can be reduced, and the detection efficiency is improved. The value range is 5-15g through a large amount of practice and experiments.
The invention is further illustrated and described by the following examples.
Example 1
a. Removing water in the titanium dioxide to be detected in an oven, wherein the temperature of the oven is 110 ℃;
b. Cooling the titanium dioxide to be detected after moisture removal to room temperature in a drying box;
c. Taking 5g of a titanium dioxide sample, and putting the obtained titanium dioxide sample into a 100ml beaker;
d. Dropwise adding pure water into the beaker, and stirring by using a glass rod in a clockwise or anticlockwise direction until the titanium dioxide sample is fully wetted;
e. And d, measuring the pure water amount M2g used for fully wetting the end point of the titanium dioxide sample in the step d.
Example 2
a. Removing water in the titanium dioxide to be detected in an oven, wherein the temperature of the oven is 120 ℃;
b. Cooling the titanium dioxide to be detected after moisture removal to room temperature in a drying box;
c. Taking 10g of a titanium dioxide sample, and putting the obtained titanium dioxide sample into a 100ml beaker;
d. Dropwise adding pure water into the beaker, and stirring by using a glass rod in a clockwise or anticlockwise direction until the titanium dioxide sample is fully wetted;
e. And d, measuring the pure water amount M2g used for fully wetting the end point of the titanium dioxide sample in the step d.
Example 3
a. Removing water in the titanium dioxide to be detected in an oven, wherein the temperature of the oven is 110 ℃;
b. Cooling the titanium dioxide to be detected after moisture removal to room temperature in a drying box;
c. Taking 15g of a titanium dioxide sample, and putting the titanium dioxide sample into a 100ml beaker;
d. Dropwise adding pure water into the beaker, and stirring by using a glass rod in a clockwise or anticlockwise direction until the titanium dioxide sample is fully wetted;
e. And d, measuring the pure water amount M2g used for fully wetting the end point of the titanium dioxide sample in the step d.
Example 4
a. Removing water in the titanium dioxide to be detected in an oven, wherein the temperature of the oven is 120 ℃;
b. Cooling the titanium dioxide to be detected after moisture removal to room temperature in a drying box;
c. Taking 10g of a titanium dioxide sample, and putting the titanium dioxide sample into a 100ml beaker;
d. Dropwise adding pure water into the beaker, stirring by using a glass rod in a clockwise or anticlockwise direction, and controlling the stirring speed to be 60 circles/minute until the titanium dioxide sample is fully wetted;
e. And d, measuring the pure water amount M2g used for fully wetting the end point of the titanium dioxide sample in the step d.
Example 5
a. Removing water in the titanium dioxide to be detected in an oven, wherein the temperature of the oven is 120 ℃;
b. Cooling the titanium dioxide to be detected after moisture removal to room temperature in a drying box;
c. Taking 10g of a titanium dioxide sample, and putting the obtained titanium dioxide sample into a 100ml beaker;
d. Dropwise adding pure water into the beaker, stirring by using a glass rod in a clockwise or anticlockwise direction, and controlling the stirring speed to be 120 circles/minute until the titanium dioxide sample is fully wetted;
e. And d, measuring the pure water amount M2g used for fully wetting the end point of the titanium dioxide sample in the step d.
the results of the above examples calculated from water absorption capacity M1/M2 × 100g are shown in table 1.
TABLE 1 Water absorption test results for titanium dioxide
| Examples | Water absorption (%) | Mean deviation of |
| Example 1 | 43.57 | -0.06 |
| Example 2 | 43.48 | -0.15 |
| Example 3 | 44.06 | 0.43 |
| Example 4 | 43.67 | 0.04 |
| Example 5 | 43.35 | -0.28 |
| Mean value of | 43.63 |
The method for detecting the water absorption capacity of the titanium dioxide can realize the detection of the water absorption capacity of the titanium dioxide, is convenient to operate, has high detection efficiency and high accuracy, and is beneficial to popularization. The invention detects the water absorption amount by the flow point, and the inventor finds that compared with the water absorption amount of the titanium dioxide measured by the pressure method, the method is less influenced by the temperature of the environment and the strength of detection personnel, so that the repeatability is better, and the result is more intuitive and closer to the real number.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (7)
1. The method for detecting the water absorption capacity of the titanium dioxide is characterized by comprising the following steps of:
a. Removing water in the titanium dioxide to be detected;
b. B, cooling the titanium dioxide to be detected, of which the moisture is removed in the step a, to room temperature;
c. Taking a proper amount of titanium dioxide samples and putting the samples into a beaker;
d. Dropwise adding pure water into the titanium dioxide sample in the beaker, and uniformly stirring in the same direction until the titanium dioxide sample is just fully wetted;
e. And d, recording the pure water amount used for fully wetting the titanium dioxide sample in the step d.
2. The method for detecting the water absorption capacity of titanium dioxide according to claim 1, wherein the method comprises the following steps: and (a) removing moisture from the titanium dioxide to be detected in an oven, wherein the temperature of the oven is less than 120 ℃.
3. The method for detecting the water absorption capacity of titanium dioxide according to claim 1 or 2, characterized in that: and step b, cooling the titanium dioxide to be detected to room temperature in a drying box.
4. The method for detecting the water absorption capacity of titanium dioxide according to any one of claims 1 to 3, characterized in that: and c, the using amount of the titanium dioxide in the step c is less than 100 g.
5. The method for detecting the water absorption capacity of titanium dioxide according to any one of claims 1 to 4, wherein the method comprises the following steps: the dosage of the titanium dioxide in the step c is between 5 and 15 g.
6. The method for detecting the water absorption capacity of titanium dioxide according to any one of claims 1 to 5, wherein: and d, when pure water is dripped into the titanium dioxide sample in the step d, the testing end point is set when the slurry can be dripped on the glass rod.
7. The method for detecting the water absorption capacity of titanium dioxide according to any one of claims 1 to 6, wherein the method comprises the following steps: the time for completing the step d is controlled to be between 10 and 15 min.
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| CN202010270972.8A CN111426592A (en) | 2020-04-08 | 2020-04-08 | Method for detecting water absorption capacity of titanium dioxide |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111855475A (en) * | 2020-08-19 | 2020-10-30 | 攀钢集团重庆钛业有限公司 | Method for detecting water absorption capacity of titanium dioxide |
| CN113048860A (en) * | 2021-03-30 | 2021-06-29 | 攀钢集团西昌钢钒有限公司 | Tool and method for measuring thickness abrasion loss of pulley block wheel rim |
| CN113324919A (en) * | 2021-05-24 | 2021-08-31 | 龙佰四川钛业有限公司 | Titanium dioxide oil absorption detection method |
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Cited By (4)
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| CN111855475A (en) * | 2020-08-19 | 2020-10-30 | 攀钢集团重庆钛业有限公司 | Method for detecting water absorption capacity of titanium dioxide |
| CN113048860A (en) * | 2021-03-30 | 2021-06-29 | 攀钢集团西昌钢钒有限公司 | Tool and method for measuring thickness abrasion loss of pulley block wheel rim |
| CN113324919A (en) * | 2021-05-24 | 2021-08-31 | 龙佰四川钛业有限公司 | Titanium dioxide oil absorption detection method |
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Application publication date: 20200717 |