CN108061718A - A kind of fast appraisement method of rutile type titanium white weatherability - Google Patents
A kind of fast appraisement method of rutile type titanium white weatherability Download PDFInfo
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Abstract
The present invention relates to a kind of fast appraisement methods of rutile type titanium white weatherability, comprise the following steps：Pretreatment rutile type titanium white base-material and dispersant solution are mixed to get slurry；Stirring is so that above-mentioned slurry uniformly disperses；Inorganic coating is carried out to the slurry after disperseing using coating agent；By being aged, washing, press filtration, drying and crushing obtain rutile titanium dioxide pigment；Draw TiO2Standard curve；The titanium pigment specimen solution of inorganic coating is taken, the absorbance of sample solution is measured using spectrophotometer, correlation computations is then carried out and obtains acid-soluble ratio.Advantages of the present invention：The test index of the invention for effectively solving acid-soluble ratio and being combined with the processing of titanium dioxide inorganic coating, it is capable of the effect of Fast Evaluation rutile type titanium white body inorganic coating processing, result precision is high, used time is few, can identify the quality that titanium dioxide surface treatment is evaluated in quality of production control and the research and development of new product in titanium dioxide industry rapidly.
Description
Technical field
The present invention relates to chemical analysis technology field, more particularly to a kind of Fast Evaluation of rutile type titanium white weatherability
Method.
Background technology
Titanium dioxide have higher photochemical activity, had a wide range of applications in the substances such as coating, plastics, due to easily by
The influence of the external environments such as sunlight and air effect, occurs photochemical reaction, so as to which the novel substance for exciting generation can destroy plastics
Phenomena such as waiting organic substances, causing weatherability decrease, the easy dusting of film and xanthochromia.Simultaneously because titanium dioxide is a kind of hydrophilic and oleophobic
Substance, if not coated to its surface, it will influence the dispersiveness in various solvents and non-solvent coating.At present, in titanium white
It is the photochemistry defect for being difficult to change titanium dioxide that its process for producing is unanimously thought in the research and application of powder, can only reduce it
Photochemical activity.Therefore, in order to improve the weatherability of titanium dioxide, dispersiveness, optical stability, it is new to assign titanium dioxide powder
Application performance, it is necessary to be coated to its surface.
The weatherability of titanium dioxide is to weigh an important indicator of titanium white powder pigment surface-coating application performance, but in reality
In production application, traditional detection method is to use sunlight exposure, generally most short to need 12 months.In recent years, it is shortening aging
Test period, someone use artificial accelerated aging case, under simulating natural condition wind, solarization, drench with rain, make degradation all
Phase can complete in 2 months, but this method can not still meet needs of the product in quality of production control.In some research and development titanium whites
In powder product process, weatherability is to select surface-coating treated that titanium dioxide is mixed with refined linseed oil, after processing,
Finally Continuous irradiation in the UV lamp, places into refrigerator after irradiation and freezes, then repeatedly in ultraviolet lamp and refrigerator into
Row " irradiation-freezing " operation processing finally by the chromatic aberration of whiteness instrument measurement powder, and then characterizes the height of weatherability.
Above detection process method with duration, of high cost, cumbersome, seriously affects the production of product and research and development process.
The content of the invention
The shortcomings that the purpose of the invention is in the presence of background technology, and a kind of rutile type titanium white proposed is resistance to
The fast appraisement method of time property.
To achieve these goals, present invention employs following technical solutions：
A kind of fast appraisement method of rutile type titanium white weatherability, which is characterized in that comprise the following steps：
Step 1: pretreatment rutile type titanium white base-material and dispersant solution are mixed to get slurry, make the TiO in slurry2
Concentration is 250~450g/L；
Step 2: stirring is so that above-mentioned slurry uniformly disperses, and heats and be allowed to warm to 40~90 DEG C, while sizes mixing and expect that pH is 4
~11；
Step 3: inorganic coating is carried out to the slurry after disperseing using coating agent；
Step 4: after inorganic coating, by being aged, washing, press filtration, drying and crushing obtain rutile type titanium white face
Material；
Step 5: prepare TiO2Standard specimen draws TiO2Standard curve；
Step 6: taking the titanium pigment specimen solution of inorganic coating, the absorbance of sample solution is surveyed using spectrophotometer
It is fixed, detect TiO2The molten concentration of acid, then carry out correlation computations and obtain acid-soluble ratio.
Based on the above technical solutions, there can be technical solution further below：
Dispersant described in step 1 is any one in Triton X-100, calgon, sodium polyphosphate,
The mass ratio of dispersant and titanium dioxide is 0.1%~0.6%, and the grain size of rutile type titanium white base-material is 0.15~0.35 μm.
The time that slurry is stirred when uniformly dispersing in step 2 is 25-35min.
The pH of the slurry is debugged in step 2 using NaOH solution.
Ageing carries out under stirring described in step 4, when the time of ageing is 0.5~2 small.
Coating agent described in step 3 is aluminium salt, silicon salt and zirconates, and the coating agent of aluminium salt is NaAlO2Or Al2(SO4)3,
Al2O3Coating quantity account for TiO2The 1.0%~4.0% of gross mass；The coating agent of silicon salt is Na2SiO3, SiO2Coating quantity account for TiO2
The 1.5%~3.5% of gross mass；The coating agent of zirconates is Zr (SO4)2Or ZrOCl2, ZrO2Coating quantity account for TiO2Gross mass
0.5%~2.0%.
When the addition time of coating agent described in step 3 is 0.5~1 small, the pH of slurry is 3~10 during coating,
Temperature is 30~95 DEG C.
PH under ageing state described in step 4 is 5~11.
The advantage of the invention is that：It is of the invention effectively to solve what acid-soluble ratio was combined with the processing of titanium dioxide inorganic coating
Test index is capable of the effect of Fast Evaluation rutile type titanium white body inorganic coating processing, and result precision is high, and the used time is few,
It can identify rapidly in quality of production control and the research and development of new product in titanium dioxide industry and evaluate the excellent of titanium dioxide surface treatment
It is bad, significant effect.
Description of the drawings
Fig. 1 is the flow diagram of the present invention；
Fig. 2 is the canonical plotting of the present invention.
Specific embodiment
In order to which the present invention is more clearly understood, below in conjunction with Fig. 1, Fig. 2 and table 1, the present invention is described in detail.
Embodiment one, a kind of fast appraisement method of rutile type titanium white weatherability provided by the invention, feature exist
In comprising the following steps：
Step 1: add in dispersant in dispersion tank, dispersant uses Triton X-100, dispersant and titanium dioxide
Mass ratio is 0.1%~0.6%, and this programme is preferably 0.2%, and the grain size of rutile type titanium white base-material is 0.15~0.35 μm, this
Scheme is preferably 0.3 μm, pretreatment rutile type titanium white base-material and dispersant solution is mixed to get slurry, in slurry
TiO2 250~450g/L of concentration, this programme are preferably 400g/L.
Step 2: above-mentioned mixed slurry is placed in coating tank, 30min is stirred, makes it homodisperse, and heating makes its liter
Temperature is to 70 DEG C, and the NaOH solution for being 20%-40% with mass fraction, which is sized mixing, expects that pH is 9, the mass fraction of NaOH solution in this programme
For 30%.
Step 3: carrying out surface-coating processing using silicon coating agent, the pH of coating process is 8~10, and this programme is preferably
9, temperature is 75~95 DEG C, and this programme is preferably 85 DEG C, and the coating agent of silicon salt is Na2SiO3, SiO2Coating quantity account for TiO2Total matter
The 1.5%~4.5% of amount, this programme is preferably 3.5%, and when time for adding is 0.5 small or so, 75~98% sulfuric acid is the pH of slurry
Conditioning agent.
Step 4: after silicon coating, when ageing 0.8 is small under stirring, pH is maintained at 9.
Step 5: carrying out surface-coating processing using aluminium coating agent, the pH of coating process is 5~7, and this programme is preferably 6,
Temperature is 30~65 DEG C, and this programme is preferably 50 DEG C, and the coating agent of aluminium salt is NaAlO2Or Al2(SO4)3, Al2O3Coating quantity account for
TiO2The 1.5%~3.5% of gross mass, this programme are preferably 2.5%, when time for adding is 0.5 small, coating agent NaAlO2Corresponding slurry
PH adjusting agent be 75~98% sulfuric acid, this programme be preferably 95%, Al2 (SO4) 3 correspond to the pH adjusting agent of slurry for 20~
40% NaOH solution, this programme are preferably 30%.
Step 6: after aluminium coating, when ageing 0.8 is small under stirring, pH is maintained at 7, after ageing, washes
It washs, press filtration dry, pulverize, and obtain rutile titanium dioxide pigment.
Step 7: prepare TiO2Standard specimen draws TiO2Standard curve.
Step 8: the titanium pigment specimen of processing inorganic coating, takes its sample solution, using spectrophotometer to sample solution
Absorbance be measured, detect TiO2The molten concentration of acid, then carry out correlation computations and obtain acid-soluble ratio.
Embodiment two
Step 1: add in dispersant in dispersion tank, dispersant uses calgon, and the mass ratio of dispersant and titanium dioxide is
0.5%, the grain size of rutile type titanium white base-material is 0.25 μm, by pretreatment rutile type titanium white base-material and dispersant solution
It is mixed to get slurry, the TiO2 concentration in slurry is 300g/L.
Step 2: above-mentioned mixed slurry is placed in coating tank, 30min is stirred, makes it homodisperse, and heating makes its liter
Temperature is to 70 DEG C, and the NaOH solution for being 20%-40% with mass fraction, which is sized mixing, expects that pH is 9, the mass fraction of NaOH solution in this programme
For 30%.
Step 3: carrying out surface-coating processing using silicon coating agent, the coating agent of silicon salt is Na2SiO3, SiO2Coating quantity
Account for TiO2The 3% of gross mass, when the added coating agent time is 0.8 small.
Step 4: after silicon salt coating, when ageing 0.8 is small under stirring, pH is maintained at 7, after ageing, washes
It washs, press filtration dry, pulverize, and obtain rutile titanium dioxide pigment.
Step 5: prepare TiO2Standard specimen draws TiO2Standard curve.
Step 6: the titanium pigment specimen of processing inorganic coating, takes its sample solution, using spectrophotometer to sample solution
Absorbance be measured, detect TiO2The molten concentration of acid, then carry out correlation computations and obtain acid-soluble ratio.
Embodiment three
Step 1: add in dispersant in dispersion tank, dispersant sodium polyphosphate, the mass ratio of dispersant and titanium dioxide is
0.3%, the grain size of rutile type titanium white base-material is 0.2 μm, and pretreatment rutile type titanium white base-material is mixed with dispersant solution
Conjunction obtains slurry, 350~450g/L of TiO2 concentration in slurry.
Step 2: above-mentioned mixed slurry is placed in coating tank, 30min is stirred, makes it homodisperse, and heating makes its liter
For temperature to 60 DEG C, the NaOH solution for being 25% with mass fraction, which is sized mixing, expects that pH is 9.
Step 3: carrying out surface-coating processing using zirconates coating agent, the coating agent of zirconates is Zr (SO4)2Or ZrOCl2,
ZrO2Coating quantity account for TiO2The 1% of gross mass, when time for adding is 0.8 small or so, 30% NaOH solution is adjusted for the pH of slurry
Agent,
Step 4: after silicon coating, when ageing 0.7 is small under stirring, pH is maintained at 8.5.
Step 5: carrying out surface-coating processing using aluminium coating agent, the coating agent of aluminium salt is NaAlO2Or Al2(SO4)3,
Al2O3Coating quantity account for TiO2The 2% of gross mass, when time for adding is 0.5 small, coating agent NaAlO2The pH adjusting agent of corresponding slurry
For 90% sulfuric acid, Al2(SO4)3The NaOH solution that the pH adjusting agent of corresponding slurry is 30%, the pH of coating process is 9, and temperature is
60℃。
Step 6: after aluminium coating, when ageing 0.9 is small under stirring, pH is maintained at 8, after ageing, washes
It washs, press filtration dry, pulverize, and obtain rutile titanium dioxide pigment.
Step 7:, prepare TiO2Standard specimen draws TiO2Standard curve.
Step 8: the titanium pigment specimen of processing inorganic coating, takes its sample solution, using spectrophotometer to sample solution
Absorbance be measured, detect TiO2The molten concentration of acid, then carry out correlation computations and obtain acid-soluble ratio.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention；Appoint
What those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the side of the disclosure above
Method and technology contents make technical solution of the present invention many possible changes and modifications or are revised as the equivalent reality of equivalent variations
Apply example.Therefore, every content without departing from technical solution of the present invention, technical spirit according to the invention do above example
Any simple modification, equivalent substitution, equivalence changes and modification, still fall within technical solution of the present invention protection in the range of.
Table 1 is embodiment acid-soluble ratio result of calculation.
Table 1
| Project number | Concentration（mg/ml） | Absorbance | Acid-soluble ratio（%） |
| Embodiment one（2.0015g） | 0.04095 | 0.212 | 20.46 |
| Embodiment two（2.0016g） | 0.06424 | 0.335 | 32.10 |
| Embodiment three（2.0018g） | 0.04322 | 0.224 | 21.59 |
Claims (8)
1. a kind of fast appraisement method of rutile type titanium white weatherability, which is characterized in that comprise the following steps：
Step 1: pretreatment rutile type titanium white base-material and dispersant solution are mixed to get slurry, make the TiO in slurry2It is dense
It spends for 250~450g/L；
Step 2: stirring is so that above-mentioned slurry uniformly disperses, and heats and be allowed to warm to 40~90 DEG C, while sizes mixing and expect that pH is 4
~11；
Step 3: inorganic coating is carried out to the slurry after disperseing using coating agent；
Step 4: after inorganic coating, by being aged, washing, press filtration, drying and crushing obtain the red stone-type titanium dioxide face of golden `
Material；
Step 5: prepare TiO2Standard specimen draws TiO2Standard curve；
Step 6: taking the titanium pigment specimen solution of inorganic coating, the absorbance of sample solution is surveyed using spectrophotometer
It is fixed, detect TiO2The molten concentration of acid, then carry out correlation computations and obtain acid-soluble ratio.
2. a kind of fast appraisement method of rutile type titanium white weatherability according to claim 1, it is characterised in that：Step
Dispersant described in rapid one is Triton X-100, calgon, any one in sodium polyphosphate, dispersant
Mass ratio with titanium dioxide is 0.1%~0.6%, and the grain size of rutile type titanium white base-material is 0.15~0.35 μm.
3. a kind of fast appraisement method of rutile type titanium white weatherability according to claim 1, it is characterised in that：Step
The time that slurry is stirred when uniformly dispersing in rapid two is 25-35min.
4. a kind of fast appraisement method of rutile type titanium white weatherability according to claim 1, it is characterised in that：Step
The NaOH solution used in rapid two debugs the pH of the slurry.
5. a kind of fast appraisement method of rutile type titanium white weatherability according to claim 1, it is characterised in that：Step
Ageing carries out under stirring described in rapid four, when the time of ageing is 0.5~2 small.
6. a kind of fast appraisement method of rutile type titanium white weatherability according to claim 1, it is characterised in that：Step
Coating agent described in rapid three is aluminium salt, silicon salt and zirconates, and the coating agent of aluminium salt is NaAlO2Or Al2(SO4)3, Al2O3Coating quantity
Account for TiO2The 1.0%~4.0% of gross mass；The coating agent of silicon salt is Na2SiO3, SiO2Coating quantity account for TiO2The 1.5% of gross mass~
3.5%；The coating agent of zirconates is Zr (SO4)2Or ZrOCl2, ZrO2Coating quantity account for TiO2The 0.5%~2.0% of gross mass.
7. a kind of fast appraisement method of rutile type titanium white weatherability according to claim 1, it is characterised in that：Step
The addition time of coating agent described in rapid three for 0.5~1 it is small when, the pH of slurry is 3~10 during coating, temperature for 30~
95℃。
8. a kind of fast appraisement method of rutile type titanium white weatherability according to claim 1, it is characterised in that：Step
PH described in rapid four under ageing state is 5~11.
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Cited By (6)
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| CN108864771A (en) * | 2018-09-05 | 2018-11-23 | 襄阳龙蟒钛业有限公司 | It is a kind of for producing the coating agent of high glaze titanium dioxide |
| CN110455730A (en) * | 2019-08-23 | 2019-11-15 | 佛山市顺德区美的洗涤电器制造有限公司 | Using the method for titanium dioxide crystal form in spectrophotometry measurement White plastic film |
| CN111307741A (en) * | 2020-03-18 | 2020-06-19 | 龙佰四川钛业有限公司 | Method for detecting hydrophobicity of color master batch-grade titanium dioxide |
| CN111504890A (en) * | 2020-04-28 | 2020-08-07 | 烟台大学 | Rapid detection method for weather resistance of titanium dioxide |
| CN113324919A (en) * | 2021-05-24 | 2021-08-31 | 龙佰四川钛业有限公司 | Titanium dioxide oil absorption detection method |
| CN115537043A (en) * | 2022-09-22 | 2022-12-30 | 广西金茂钛业有限公司 | Method for preparing titanium dioxide for papermaking |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108864771A (en) * | 2018-09-05 | 2018-11-23 | 襄阳龙蟒钛业有限公司 | It is a kind of for producing the coating agent of high glaze titanium dioxide |
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| CN113324919A (en) * | 2021-05-24 | 2021-08-31 | 龙佰四川钛业有限公司 | Titanium dioxide oil absorption detection method |
| CN115537043A (en) * | 2022-09-22 | 2022-12-30 | 广西金茂钛业有限公司 | Method for preparing titanium dioxide for papermaking |
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