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Nano-titanium dioxide sol finishing agent prepared at low temperature and application thereof

A nano-titanium dioxide and finishing agent technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, fiber treatment, etc., can solve problems such as high temperature, growth of crystal particles, premature aging of fiber materials or adhesives, and achieve Effect of low temperature and improved photocatalytic performance

Active Publication Date: 2013-11-20
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fourth, during use, the strong redox property of the photocatalyst will also promote the premature aging of the organic fiber material itself or the adhesive
The alcohol sol method uses alcohol as a solvent, and the amount of water is less, but when the precursor reacts in a water-less system, the hydrolysis reaction of the precursor is insufficient, and organic hydrolysis products are easily generated, so subsequent heat treatment is still required, generally more than Crystals can only be obtained by high-temperature treatment above 350°C. There are disadvantages such as high temperature in the preparation process and high energy consumption, and the crystal particles will also grow up during the heat treatment process, which will affect the quality of nano-TiO. 2 photocatalytic activity

Method used

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  • Nano-titanium dioxide sol finishing agent prepared at low temperature and application thereof
  • Nano-titanium dioxide sol finishing agent prepared at low temperature and application thereof
  • Nano-titanium dioxide sol finishing agent prepared at low temperature and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The 32×32 68×68 cotton fabric was treated with water steaming process, and then its crystal form was characterized by X-ray diffractometer (X'pert Powder).

[0042] Water boiling process: fabric drying→impregnation of nano-titanium dioxide sol for 30s→two dipping and two padding (finishing agent concentration 20g / L, liquid rolling rate 80%)→pre-baking (80°C, 5min)→baking (97°C, 6min) →Steam in boiling water for 180min→Dry.

[0043] The X-ray diffraction patterns of cotton fabrics treated with different finishing processes are as follows: figure 1 Shown, (a) unfinished (b) baking treatment (c) water boiling treatment. The water-boiling-steamed fabrics have strong diffraction peaks around 2θ of 25.3, 37.8, and 48.0, which correspond to (101), (004), and (200) crystal planes of anatase, respectively, and have better crystallization properties. However, in the conventional rolling and baking process, the characteristic absorption peak of anatase nano-titanium dioxide is n...

Embodiment 2

[0048] The 32×32 68×68 cotton fabric was treated with water steaming process, and then its surface was characterized by S-3400-N scanning electron microscope.

[0049] Water steaming process: fabric drying→impregnation of nano-titanium dioxide sol for 30s→second dipping and second rolling (finishing agent concentration 20g / L, liquid rolling rate 80%)→pre-baking (80°C, 5min)→baking (97°C, 6min)→ Boil and steam for 180min → dry.

[0050] figure 2 SEM comparison of cotton fabrics with different finishing processes, (a) unfinished (b) baking treatment (c) water boiling treatment. figure 2 It shows that the dry and hot environment of baking makes the sol film syneresis, and the continuous film layer cannot be formed after drying, and the titanium dioxide film does not form a good combination with the fiber, and it is easy to peel off; A continuous and complete film layer.

Embodiment 3

[0054] Embodiment 3 treats the anti-ultraviolet performance of cotton fabric with different finishing processes

[0055] The 32×32 68×68 cotton fabric was treated with water steaming process, and then its UV resistance was measured with an ultraviolet transmission analyzer (UV1000F).

[0056] Water steaming process: fabric drying→impregnation of nano-titanium dioxide sol for 30s→second dipping and second rolling (finishing agent concentration 20g / L, liquid rolling rate 80%)→pre-baking (80°C, 5min)→baking (97°C, 6min)→ Boil and steam for 180min → dry.

[0057] Durability test: After the treated fabric is washed 10 times, its anti-ultraviolet effect is tested.

[0058] Table 1. UV protection properties of cotton fabrics before and after different processes

[0059]

[0060] The UPF value of the fabric treated by baking method decreased by 34.5% after washing; while the UPF value of the fabric treated by water boiling method decreased by only 10% after washing.

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Abstract

The invention relates to a nano-titanium dioxide sol finishing agent prepared at low temperature and an application thereof. The nano-titanium dioxide sol finishing agent is prepared from the following components in parts by weight: 10-40 parts of nano-titanium dioxide sol, 2-10 parts of hand feeling regulating agent and 900-950 parts of deionized water, and the prepared nano-titanium dioxide sol finishing agent can be used for finishing fabric. Compared with the prior art, the temperature of the nano-titanium dioxide sol finishing agent is low when used for treating the fabric, and the sol can be uniformly dispersed onto the fabric and forms the firm combination with the fabric without adding a dispersing agent; and when the fabric is treated by water boiling evaporation, the titanium dioxide sol can be hydrolyzed and condensed on a fiber surface, the TiO2 sol can be converted to gel to be fixed on cotton, and the combination with the cotton is firmer.

Description

technical field [0001] The invention relates to the field of textiles, in particular to a nano titanium dioxide sol finishing agent prepared at low temperature and its application. Background technique [0002] Photocatalyst material TiO 2 Because of its high photocatalytic activity, good stability and heat resistance, no secondary pollution, no irritation, non-toxic to human body and low price, it has become the most promising green photocatalytic material. The application of nano-photocatalysts on fiber fabrics is mainly to endow the fabrics with photocatalytic functions to obtain VOC degradation, odor removal, antibacterial, antifouling or self-cleaning properties. This photocatalyst functional fabric is used in automotive interior materials and interior decoration home textile products, so that these materials themselves can obtain long-lasting performance of degrading VOC and purifying the air in the car and indoors. In addition, it can also be used in clothing fabric...

Claims

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Application Information

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IPC IPC(8): D06M11/46D06M13/50D06M15/643C01G23/047D06M101/06
Inventor 王黎明沈勇郭青超黄熠叶凤英
Owner SHANGHAI UNIV OF ENG SCI
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