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Photocatalytic self-cleaning fabric based on nano titanium dioxide

A nano-titanium dioxide, self-cleaning technology, applied in the field of clothing processing, can solve the problems of photocatalytic efficiency and light absorption range not ideal, and achieve the effect of large commercial value, high softness, and wide light absorption range

Inactive Publication Date: 2017-10-13
NINGBO HI TECH ZONE DAKANG IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The self-cleaning wool fabric has good self-cleaning effect and long-lasting effect, but the photocatalytic efficiency and light absorption range are not ideal

Method used

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  • Photocatalytic self-cleaning fabric based on nano titanium dioxide
  • Photocatalytic self-cleaning fabric based on nano titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A photocatalytic self-cleaning fabric based on nano-TiO2, including modified nano-TiO 2 Preparation, fabric pre-treatment, biological enzyme pre-treatment, anti-self-cleaning fabric preparation, cross-linking post-treatment, the specific operation steps are:

[0016] 1) Modified nano-TiO 2 Preparation: Slowly add 25 parts of absolute ethanol to 20 parts of tetrabutyl titanate, stir until mixed into a transparent solution, then add 4 parts of copper nitrate, stir well until uniform, then add deionized water drop by drop until a gel is formed, Modified Nano-TiO 2 , after doping metal copper ions of different valence states, due to the competition of copper ions for electrons, nano-TiO 2 The probability of recombination of photogenerated electrons and photogenerated holes on the surface is reduced, and more free radicals will be generated on the surface, which promotes the formation of nano-TiO 2 The absorption and utilization of visible light can improve the photocatal...

Embodiment 2

[0023] A photocatalytic self-cleaning fabric based on nano-TiO2, including modified nano-TiO 2 Preparation, fabric pre-treatment, biological enzyme pre-treatment, anti-self-cleaning fabric preparation, cross-linking post-treatment, the specific operation steps are:

[0024] 1) Modified nano-TiO 2 Preparation: Slowly add 20 parts of absolute ethanol to 20 parts of tetrabutyl titanate, stir until mixed into a transparent solution, then add 5 parts of copper nitrate, stir well until uniform, then add deionized water drop by drop until a gel is formed, Modified Nano-TiO 2 , after doping metal copper ions of different valence states, due to the competition of copper ions for electrons, nano-TiO 2 The probability of recombination of photogenerated electrons and photogenerated holes on the surface is reduced, and more free radicals will be generated on the surface, which promotes the formation of nano-TiO 2 The absorption and utilization of visible light can improve the photocatal...

Embodiment 3

[0031] Self-cleaning and washability performance test:

[0032] Select invention embodiment 2, comparative example and blank to carry out self-cleaning test and washability test, wherein, comparative example 1: repeat the preparation process of the self-cleaning fabric in the embodiment, wherein, adopt unmodified nano-TiO 2 , all the other conditions remain unchanged; comparative example 2: repeat the preparation process of the self-cleaning fabric in the embodiment, wherein, the fabric is not subjected to biological enzyme pretreatment, and all the other conditions remain unchanged; comparative example 3: repeat the self-cleaning fabric in the embodiment Fabric preparation process, wherein the fabric is not subjected to post-crosslinking treatment, and other conditions remain unchanged. Blank is untreated raw fabric.

[0033] Self-cleaning test: red chili oil was selected as the stain, and local titration observation was carried out on the fabrics of the experimental group. ...

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Abstract

The invention discloses a photocatalytic self-cleaning fabric based on nano titanium dioxide. The photocatalytic self-cleaning fabric is prepared by the following specific steps: modifying nano TiO2 by utilizing copper ions; immersing fabric treated by a biological enzyme into nano TiO2 gel; then fixing the nano TiO2 on the fabric surface through crosslinking. The photocatalytic self-cleaning fabric disclosed by the invention has the following beneficial effects: the self-cleaning effect is good, the light absorption range is wide, other properties of the fabric are not influenced, the softness is high, and the fabric is harmless to a human body; the self-cleaning efficiency is high, the durability is excellent, the needs of people are met, the grade of knitted fabric is raised, and the added value is increased; the invention is an important method for completing product properties and expanding application range of the product and has a great commercial value; in the processing process, energy consumption is low, the generated sewage is easily treated, little environmental harm is caused, the requirements for greenness and environmental protection are satisfied relatively well, and promotion is facilitated.

Description

technical field [0001] The invention relates to the technical field of clothing processing, in particular to a photocatalytic self-cleaning fabric based on nano-titanium dioxide. Background technique [0002] Self-cleaning fabrics refer to materials that have the ability to superhydrophobic or photocatalytically degrade pollutants after post-processing. The development of this material can reduce the number of washings of clothes or realize no-washing of clothes, thereby reducing the use of detergent, and finally achieving the goals of energy saving, water saving and environmental friendliness. Self-cleaning fabrics can be divided into surface super-hydrophobic self-cleaning fabrics and photocatalytic self-cleaning fabrics according to the difference in mechanism. Superhydrophobic self-cleaning fabrics refer to surfaces with a water contact angle greater than 150°. The study found that the lotus leaf has super-hydrophobic self-cleaning effect because there are many micron-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/46D06M13/513D06M16/00D06M13/256D06M13/342D06L4/13
CPCD06M11/46D06L4/13D06M13/256D06M13/342D06M13/513D06M16/003D06M2200/01
Inventor 应杰
Owner NINGBO HI TECH ZONE DAKANG IND TECH CO LTD
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