Preparation method of long-acting photocatalytic self-cleaning fabric

Abstract

The invention provides a preparation method of a long-acting photocatalytic self-cleaning fabric. The preparation method is characterized by specifically comprising the following steps: washing the fabric and airing; mixing 10%-38wt% of a HCl solution with deionized water, steeping the fabric, performing ultrasonic treatment, dropwise adding a titanium isopropoxide solution, heating to 65-75 DEG C, and further performing the ultrasonic treatment to obtain a fabric solution; mixing 10%-38wt% of HCl solution, ethanol and deionized water, dropwise adding tetraethoxysilane to obtain SiO2 sol; and dropwise adding the SiO2 sol into the fabric solution, performing the ultrasonic treatment, taking out the fabric, drying at room temperature, washing with the deionized water, and drying to obtain the long-acting photocatalytic self-cleaning fabric. The prepared self-cleaning bactericidal fabric is good in self-cleaning and bactericidal effects, and has the long-acting effect, the self-cleaning bactericidal fabric still has high-efficiency capability of degrading organic pollutants after being washed for 25 times, and the preparation method is applicable to industrial production.

Description

technical field [0001] The invention relates to a preparation method of a long-acting photocatalytic self-cleaning fabric, which belongs to the field of finishing of textile fabrics. Background technique [0002] In recent years, people have tried to use various methods and means to find new ways to realize the functionalization of textiles, among which nano-TiO 2 , ZnO and other photocatalytic materials are widely used in the functional finishing of textiles due to their high chemical stability, photocatalytic activity, UV absorption, non-toxic and non-irritating, and the development of multi-functional and high value-added textiles. Automotive interiors, medical sheets, curtains, surgical gowns, etc. [0003] In 1972, Fujishima et al. published on the Nature magazine about TiO 2 The article on photocatalytic water splitting to produce hydrogen marks the beginning of the era of photocatalysis. In 1977, Frank et al. reported on the famous journal J.Phy.Chem. that titanium...

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Problems solved by technology

The patent with the publication number CN101701422A uses titanium dioxide sol to double-dip and double-roll to treat wool fabrics to solve the problem that protein fibers affect self-cleaning due to low chemical and thermal resistance, but the patent does not evaluate the durability of wool fabric self-cleaning; The patent No. CN 103410001A utilizes organic sulfonated polyether ether ketone to prepare a finishing solution to treat cotton fabrics, so as to solve the problems of poor bonding fastness between inorganic photocatalytic particles and cotton fibers and poor hand feeling of fibers; the publication number is CN 101880961A The patent of the company provides a preparation method of a modified nano-titanium dioxide photocatalyst fabric finishing agent. After 20 times of washing, the fabric finished with this finishing agent still has the properties of degrading formaldehyde, anti-ultraviolet and antibacterial; the patent with the publication number of CN 102277724A Using TiO 2 The fabric is treated with two dips and two pads in the finishing solution, and then treated with a water-repellent finishing agent to obtain an anti-ultraviolet and antibacterial self-cleaning fabric

[0004] Summarizing the current research, the existing problems mainly focus on: 1. Pure TiO 2 The photocatalytic efficiency of the base photocatalytic material is not high, and it needs to be irradiated by ultraviolet light to play the role of decomposing organic matter; 2. Nano-TiO 2 The particles themselves have no affinity for fibers and are difficult to fix on the surface of the fiber fabric. After padding, they are fixed on the surface of the fabric by direct adsorption. After one or several times of washing, the fabric loses its photocatalytic ability

There are also methods to improve the washing resistance of photocatalytic fabrics by coating adhesives on the surface of the fabrics, but at the expense of fabric feel, and at the same time bring about the problem of decreased contact between photocatalysts and air and light

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