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

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...

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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

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