Titanium dioxide for extinction of chinlon chemical fibers and preparation method of titanium dioxide

A technology of titanium dioxide and composite titanium dioxide, applied in chemical instruments and methods, fibrous fillers, rayon manufacturing and other directions, can solve the problems of inability to obtain titanium dioxide, reduce photocatalytic activity, reduce extinction ability, etc., and achieve favorable extinction performance. and mechanical properties, reduce photocatalytic activity, and improve the effect of long-lasting effect

Active Publication Date: 2022-07-22
天泰(福建)新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Titanium dioxide is currently a chemical fiber additive with good comprehensive properties such as shading power and whiteness on the market, but the low-cost anatase titanium dioxide has photocatalytic activity, which will degrade polyamide molecules and cause the aging of nylon fibers, so it needs to be coated Modification to obtain more stable and better dispersible products
[0011] 1) In the prior art, the coating method of adding inorganic silicon sources or aluminum salts is used. In order to form a dense layer, multiple coating operations are often used (in order to cover the photocatalytic active center of titanium dioxide, the compactness and high density of the coating film are too much pursued. Integrity), and the use of high concentrations of metal salts not only leads to excessive particle size, but also easily forms a large amount of alumina and silica particle impurities (non-film-forming coating) in the solution, and also leads to a large amount of metal salt wastewater (the inorganic treatment agent commonly used in the prior art is water glass namely sodium silicate, sodium aluminate, aluminum sulfate, zirconium sulfate etc.), reclaims difficulty, and processing cost is high
[0012] 2) When the existing technology adopts organic molecular modification, it is often directly physically adsorbed on the surf

Method used

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  • Titanium dioxide for extinction of chinlon chemical fibers and preparation method of titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Preparation of Ultrafine Titanium Dioxide 1

[0076] 1) Under the condition of room temperature and stirring, 0.5kg of 20wt% titanyl sulfate solution was slowly added to 1.5L sodium carbonate solution containing 0.5wt% sodium dodecylbenzenesulfonate, the sodium carbonate concentration was 15wt%, fully stirred 30min; then ultrasonically vibrated for 10min, and after it was fully dispersed, ammonia water was added dropwise with stirring to accelerate the precipitation;

[0077] 2) After the precipitation is complete, add barium chloride solution (the mass consumption of adding barium chloride is 220g), continue stirring for 60min to promote the reaction to precipitate on the surface of titanate particles (form barium carbonate precipitation coating TIO (OH) 2 ) to obtain barium carbonate-coated TIO(OH) 2 the coated particles;

[0078] 3) Filter the precipitate, wash the solid, calcinate at 500°C for 1 hour, add excess dilute hydrochloric acid after cooling, stir for 30m...

Embodiment 1A

[0080] Preparation of Ultrafine Titanium Dioxide 2

[0081] 1) Under room temperature and stirring conditions, 1kg of 25wt% titanium oxynitrate solution was slowly added to the 2L sodium carbonate solution containing 0.3wt% sodium dodecylbenzenesulfonate, the sodium carbonate concentration was 10wt%, and stirred for 60min; then Ultrasonic vibration is carried out to disperse for 15min, and after it is fully dispersed, ammonia water is added dropwise under stirring to accelerate precipitation (keeping pH 9.5-10);

[0082] 2) Add barium chloride solution (the amount of barium chloride is 0.5kg) after the precipitation is complete, continue to stir for 60min to promote the reaction to precipitate on the surface of titanic acid particles, thereby obtaining barium carbonate coated TIO (OH) 2 the coated particles;

[0083] 3) Filter the precipitate, fully wash the solid with deionized water, dry it, then calcinate at 600 °C for 1 h, add excess dilute hydrochloric acid after cooling...

Embodiment 2

[0089] Preparation of Amorphous Silicon Core Aluminum Base Titanium Dioxide

[0090]1) Take 0.1kg of mesoporous silica micropowder (average particle size of about 0.22 microns) and disperse the prepared slurry with deionized water to obtain about 0.5L of slurry, add hydrochloric acid under stirring to adjust pH2; under 40°C water bath and stirring, Slowly add 62ml of titanium tetrachloride; stir at a constant temperature for 90min after the addition, then adjust the pH to 9.5 with sodium hydroxide, and add 100ml of sodium metaaluminate solution dropwise under stirring conditions, which contains about 10g of sodium metaaluminate. Continue to keep stirring for 60 min.

[0091] 2) After the reaction was completed, carbon dioxide was continuously introduced to excess under stirring conditions to fully precipitate aluminum ions until the pH of the solution remained constant and weakly acidic (about 6.5); then the solution was aged for 16 hours at room temperature. After aging, the...

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PUM

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Abstract

The invention relates to composite titanium dioxide used as a nylon chemical fiber delustering agent, which is formed by mixing a meso-porous silicon coated superfine titanium dioxide main component and an amorphous silicon core aluminum-based titanium dioxide auxiliary component, and the mixed material is subjected to surface treatment. Wherein the weight ratio of the meso-porous silicon coated ultrafine titanium dioxide is not less than 50wt%; the particle size D90 of the meso-porous silicon coated ultrafine titanium dioxide is less than or equal to 0.3 mu m; d90 of the amorphous silicon-core aluminum-based titanium dioxide is less than or equal to 0.45 mu m. The particle size range of the composite titanium dioxide provided by the invention corresponds to about half of the wavelength of visible light, and the composite titanium dioxide has significantly improved particle uniformity and matting performance.

Description

technical field [0001] The invention relates to the technical field of nylon chemical fiber matting agents, in particular to a composite titanium dioxide used as a nylon matting agent and a preparation process thereof. Background technique [0002] Nylon chemical fiber, also known as polyamide fiber or nylon, is a textile fiber with excellent mechanical properties, but ordinary nylon fiber strongly reflects light due to the orderly arrangement of molecules, resulting in dazzling luster and high transparency. In order to solve this problem, functional inorganic powders such as anatase titanium dioxide, that is, a matting agent for nylon fibers, are usually added to synthetic fibers. [0003] Titanium dioxide is a chemical fiber additive with good comprehensive properties such as shading power and whiteness on the market. However, the low-cost anatase titanium dioxide has photocatalytic activity, which will degrade polyamide molecules and cause the aging problem of nylon fiber...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/06C09C3/12D01F1/10D01F6/90
CPCC09C1/3661C09C1/3653C09C1/3684D01F1/10D01F6/90C01P2004/62C01P2006/90
Inventor 陈羲
Owner 天泰(福建)新材料科技有限公司
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