A kind of preparation method of environmental purification finishing agent based on nano-titanium dioxide hydrosol

A nano-titanium dioxide and environmental purification technology, applied in chemical instruments and methods, water treatment of special compounds, physical/chemical process catalysts, etc., can solve the problems of textile fiber cracking, large damage to fiber mechanical properties, and poor bonding fastness of fabrics , to achieve the effect of less damage to the mechanical properties of the fiber, which is conducive to industrialization and high catalytic activity

Inactive Publication Date: 2018-02-09
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The commonly used methods for preparing nano-titanium dioxide include sol-gel method, precipitation method, hydrothermal method, etc. Among them, the sol-gel method is not only an important method for synthesizing inorganic compounds or inorganic materials under low temperature or mild conditions, but also the prepared by this method The nano-titanium dioxide hydrosol can solve many disadvantages in the application of nano-titanium dioxide powder in textiles, such as poor dispersion, poor fastness to fabrics, and cracking of textile fibers.
However, there are still some problems when the nano-titanium dioxide hydrosol is used directly, such as too strong acidity (pH value is about 1.5), and when it is applied to textiles, it will damage the mechanical properties of the fiber; the solid content of nano-titanium dioxide in the hydrosol is low And its solid content cannot be adjusted, which is inconvenient to use; the hydrosol contains a large amount of hydrolyzed n-butanol and other particularly pungent by-products, which have a certain impact on the working environment and health of workers during production and use

Method used

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  • A kind of preparation method of environmental purification finishing agent based on nano-titanium dioxide hydrosol
  • A kind of preparation method of environmental purification finishing agent based on nano-titanium dioxide hydrosol

Examples

Experimental program
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Effect test

Embodiment 1

[0020] 1. Preparation of nano-titanium dioxide hydrosol: first, 50 ml of butyl titanate was dissolved in 75 ml of absolute ethanol at room temperature to form an ethanol solution of butyl titanate. At the same time, add a specified volume of nitric acid to 435 ml of distilled water to obtain an aqueous solution of dilute nitric acid, then drop the ethanol solution of butyl titanate into the aqueous solution of nitric acid at room temperature and under stirring conditions, and continue stirring for 5 hours after the dripping is completed to obtain a milky white water dispersion Finally, it was left to stand and aged for several days to form about 500 milliliters of nano-titanium dioxide hydrosol, which was slightly yellow and translucent, wherein the content of nano-titanium dioxide was 2.62%, and the content of n-butanol was 7.65%;

[0021] 2. Vacuum distillation process: Distill 500 milliliters of nano-titanium dioxide hydrosol at 40°C for 3.5 hours under reduced pressure to o...

Embodiment 2

[0028] 1. The process is the same as the 1-step process in Example 1.

[0029] 2. described underpressure distillation temperature is 60 ℃, and the time is 2.5 hours, and nano-titanium dioxide content is 3.86%, and n-butanol content is 0.21%, and all the other are identical with the 2nd step process among the embodiment 1.

[0030] 3. The added amount of acetic acid is 10.8 grams, the temperature of reaction is 60 DEG C, and the reaction time is 24 hours, and all the other are the same as the second step process in Example 1, wherein the n-butanol content is 0.015%;

[0031] 4. technology is identical with the 4 step technology in embodiment 1;

[0032] 5. technology is identical with 5 steps of technology among the embodiment 1;

[0033] 6. technology is identical with 6 steps of technology among the embodiment 1;

[0034] 7. The process is the same as the 7-step process in Example 1 to obtain the environmental purification finishing agent II.

Embodiment 3

[0036] 1. The process is the same as the 1-step process in Example 1.

[0037] 2. described underpressure distillation temperature is 80 ℃, and the time is 1.5 hours, and nano-titanium dioxide content is 3.97%, and n-butanol content is 0.09%, and all the other are identical with the 2nd step process among the embodiment 1.

[0038]3. described acetic acid addition is 7.2 grams, and temperature of reaction is 40 ℃, and the reaction times is 12 hours, and all the other are identical with the 2nd step technology among the embodiment 1, and wherein n-butanol content is 0.023%.

[0039] 4. technology is identical with the 4 step technology in embodiment 1;

[0040] 5. technology is identical with 5 steps of technology among the embodiment 1;

[0041] 6. technology is identical with 6 steps of technology among the embodiment 1;

[0042] 7. The process is the same as the 7-step process in Example 1 to obtain the environmental purification finishing agent III.

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Abstract

The invention relates to a preparation method of an environment purifying finishing agent based on a nano-titanium dioxide hydrosol, and is characterized in that the method mainly comprises the steps of reduced pressure distillation process, organic acid esterification, addition of a non-ionic surfactant, addition of a coupling agent KH570, regulation of pH and posttreatment process, wherein an organic acid can be formic acid, acetic acid, butyric acid and the like, and the addition amount is 4 g / L to 10 g / L; the surfactant can be OP-10, peregal O, JFC and the like, and the addition amount is 2 g / L. In the obtained environment purifying finishing agent, the content of nano-titanium dioxide is 1.0%, and the n-butanol residual amount is less than 0.05%; the environment purifying finishing agent can be loaded on a fiber fabric through a common rolling baking method, so that the fabric has better catalytic degradation performance on formaldehyde and other pollutants in air and organic pollutants in water bodies.

Description

technical field [0001] The invention relates to chemical catalyst technology, in particular to a preparation method of an environmental purification finishing agent based on nano-titanium dioxide hydrosol. Background technique [0002] In recent years, with the continuous development of society and the acceleration of industrialization, the problem of environmental pollution has become one of the outstanding problems that people are facing. Governments and scientists of various countries have begun to devote themselves to solving pollution problems, especially the treatment of air pollution and water pollution. As a cheap and environmentally friendly material, nano-titanium dioxide is widely used to treat harmful gases in the air environment and organic pollutants in water. Environmental harmful gases can be divided into indoor harmful gases and air pollution gases. Indoor harmful gases mainly include formaldehyde released from decorative materials and methyl mercaptan, hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J35/12B01D53/86B01D53/72C02F1/32D06M11/46C02F101/38
CPCB01D53/8668B01D2255/802B01D2257/90B01D2258/06B01J21/063B01J35/004B01J35/12C02F1/32C02F2101/40C02F2305/10D06M11/46Y02A50/20Y02W10/37
Inventor 董永春张丛灿王鹏陈震雷李英超
Owner TIANJIN POLYTECHNIC UNIV
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