Modified titanium dioxide and preparation method and application thereof

A titanium dioxide modification technology, applied in chemical instruments and methods, rayon manufacturing, textiles and papermaking, etc., can solve the problems of easy aggregation of titanium dioxide matting agent, poor weather resistance, etc., to reduce photodegradation ability and enhance hydrophilicity Sexuality, the effect of enhancing the binding strength

Active Publication Date: 2020-07-28
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a modified titanium dioxide and its preparation method and application in order to overcome the defects of easy agglomeration and poor weather resistance of the titanium dioxide matting agent in the application of nylon chemical fiber existing in the prior art

Method used

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  • Modified titanium dioxide and preparation method and application thereof
  • Modified titanium dioxide and preparation method and application thereof
  • Modified titanium dioxide and preparation method and application thereof

Examples

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Effect test

preparation example 1

[0072] This preparation example is used to prepare modified titanium dioxide, and the preparation method is as follows:

[0073] (1) Preparation of TiO 2 Dispersion liquid: first mix 20g of TiO 2 Slowly add 100mL deionized water to form TiO 2 suspension, sodium hexametaphosphate is contacted with water to form a concentration of 20wt% sodium hexametaphosphate solution, and then to the TiO 2 Add 0.2mL of the sodium hexametaphosphate solution to the suspension, and stir continuously for 1h at a stirring speed of 800rpm to obtain TiO 2 Concentration of 20wt% TiO 2 Dispersions;

[0074] (2) Add 0.06g tris (ie Tris) to the TiO 2 In the dispersion liquid, ultrasonic dissolution is prepared into a tris solution with a tris concentration of 5 mmol / L, and a hydrochloric acid solution with a hydrochloric acid concentration of 2 wt% is used to adjust the pH value of the tris solution 8.5, then add 0.1g levodopa at a stirring speed of 500rpm, add 0.05g catechol after dissolving, sti...

preparation example 2-7

[0080] Prepare the modified titanium dioxide of this preparation example according to the method of preparation example 1, the difference is that the corresponding parameters in the following table 1 are used to replace the preparation parameters of preparation example 1, and the prepared modified titanium dioxide is used as a matting agent. Anti-ultraviolet performance, catalytic performance test, the results are shown in Table 1.

[0081] Table 1

[0082]

[0083] As can be seen from the results in Table 1, the modified titanium dioxide obtained from Examples 1-7 of the present invention has excellent anti-ultraviolet properties and lower catalytic activity; especially in the preferred range of levodopa consumption of the present invention , and the modified titanium dioxide prepared in Preparation Examples 1-5 within the preferred range of the molar ratio of the soluble barium salt to the soluble sulfate in the present invention has a more excellent effect.

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Abstract

The invention relates to the technical field of preparation of delustering agents for special chemical fibers, in particular to modified titanium dioxide and a preparation method and application thereof. The modified titanium dioxide comprises titanium dioxide, wherein the surface of the titanium dioxide is in bonded with a polydopamine connecting layer, and the surface of the polydopamine connecting layer is bonded with a barium sulfate coating layer. According to the modified titanium dioxide, the uniformity of the coating layer is improved, the bonding strength of barium sulfate and titanium dioxide is enhanced, and the barium sulfate coating layer is prevented from falling off in the processes of grinding and application. Compared with a titanium dioxide delustering agent or a mixed delustering agent in the prior art, the modified titanium dioxide provided by the invention has better dispersity and weather resistance in practical application.

Description

technical field [0001] The invention relates to the technical field of preparation of a matting agent for special chemical fibers, in particular to a modified titanium dioxide and its preparation method and application. Background technique [0002] The scientific name of titanium dioxide is titanium dioxide (TiO 2 ), is a white pigment with the strongest coloring power, has high color fastness and hiding power, and is widely used in pigments, papermaking, functional ceramics, cosmetics, chemical fibers and other fields. The chemical fiber industry produces semi-dull and full-dull chemical fibers by adding nano-titanium dioxide matting agent (about 300nm in size) during the polymerization process. [0003] However, due to the small size, large specific surface area, and high surface energy of nano-titanium dioxide, it is easy to agglomerate, which is not conducive to its good dispersion in polymer fibers, thereby clogging the spinneret and pipes, resulting in poor fiber qua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/10D01F1/10D01F6/90
CPCC09C1/3653C09C1/3676C09C3/006C09C3/06C09C3/10D01F1/10D01F6/90
Inventor 刘明明杜玮辰汪绪兰张含刘雨陈爽
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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