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Photodynamic self-cleaning textile and preparation method thereof

A self-cleaning, photodynamic technology, applied in textiles and papermaking, animal fibers, fiber processing, etc., can solve problems such as the biological activity of tussah silk and its adverse effects on its wearing performance, environmental hidden dangers of chemical cross-linking agents, and mechanical damage to textiles. , to avoid photocorrosion, good applicability, and strong functional durability.

Active Publication Date: 2022-04-08
ANHUI AGRICULTURAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

Foreign scholars prepared manganese-doped nano-TiO by sol-gel method 2 , and use silicone adhesives to bind it to textiles, and use methylene blue dye to simulate pollutants. Under ultraviolet and visible light irradiation, the finished fabric shows good self-cleaning effect; at the same time, the functional fabric has good biological Compatibility, showing higher antibacterial activity under natural sunlight [Muhammad Z, Papadopoulou E L, Giulia S, George K, IosifinaG, Ourania M, Danae V. Fabrication of visible light-induced antibacterial and self-cleaning cotton fabrics using manganese doped TiO 2 nanoparticles.ACS Applied Bio Materials,2018(1):1154-1164], but pure inorganic-inorganic materials need cross-linking agents to be firmly combined with fabrics. Chemical cross-linking agents have environmental hazards, and coating on the fiber surface returns textiles Good properties have a negative impact, while TiO 2 In direct contact with fibers, the hydroxyl radicals generated during photocatalysis will photoerode fabric materials and cause mechanical damage to textiles
Invention patent CN102677465B discloses a functionalized nano-chitosan and nano-TiO 2 Modified tussah silk fabric and its preparation method, adopting acid solution to dissolve chitosan, adding TPP solution and nano TiO 2 Sol, chitosan / TiO with particle size less than 100nm obtained after strong stirring 2 Composite nano-finishing solution to treat tussah silk fabrics, but the preparation process of this method is complicated, using butane tetracarboxylic acid, polymaleic acid and tartaric acid as cross-linking agents and hypophosphite as catalysts, and at 165-170 ° C Baking tussah silk fabrics at high temperature has adverse effects on the biological activity and wearability of tussah silk

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Photodynamic self-cleaning textile and preparation method thereof
  • Photodynamic self-cleaning textile and preparation method thereof
  • Photodynamic self-cleaning textile and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Add 5 mL of tetraisopropyl titanate to 2 mL of isopropanol, stir at room temperature for 12 minutes to obtain solution A; under rapid stirring, slowly and uniformly drop solution A to 100 mL of 0.1 mol at 50 ° C through a constant pressure funnel / L nitric acid solution, keep stirring for 2 hours, then cool down to room temperature, filter out the precipitate, wash with water, dry in vacuum at 50°C for 24 hours, and grind to obtain anatase nano-TiO 2 ;

[0039] (2) the anatase nano-TiO obtained in step (1) 2 Uniformly disperse in 50mL of acetic acid solution with pH ≤ 4 to make the mass concentration 0.08%, and ultrasonically oscillate for 20min to obtain stable nano-TiO 2 Dispersions;

[0040] (3) Add aldehyde-based chitosan (viscosity average molecular weight is 19,400, deacetylation degree is 94.6%, C2, C3 position and C6 position aldehyde group content is 18.37%) in the acetic acid solution that volume concentration is 2%) stirring and dissolving , drop Span ...

Embodiment 2

[0046] (1) Add 8 mL of tetraisopropyl titanate to 4 mL of isopropanol, stir at room temperature for 15 minutes to obtain solution A; under rapid stirring, slowly and uniformly drop solution A to 150 mL of 0.1 mol at 50 ° C through a constant pressure funnel / L nitric acid solution, keep stirring for 3 hours, then cool down to room temperature, filter out the precipitate, wash with water, dry in vacuum at 50°C for 24 hours, and grind to obtain anatase nano-TiO 2 ;

[0047] (2) the anatase nano-TiO obtained in step (1) 2 Uniformly disperse in 50mL of acetic acid solution with pH ≤ 4 to make the mass concentration 0.2%, and ultrasonically oscillate for 25min to obtain stable nano-TiO 2 Dispersions;

[0048] (3) Add aldehyde-based chitosan (viscosity average molecular weight is 13,800, deacetylation degree is 92.5%, C2, C3 position and C6 position aldehyde group content is 22.94%) in the acetic acid solution that volume concentration is 2%) stirring and dissolving , drop Span 8...

Embodiment 3

[0054] (1) Add 8 mL of tetraisopropyl titanate to 4 mL of isopropanol, stir at room temperature for 18 minutes to obtain solution A; under rapid stirring, slowly and uniformly drop solution A to 150 mL of 0.1 mol at 50 ° C through a constant pressure funnel / L nitric acid solution, keep stirring for 3 hours, then cool down to room temperature, filter out the precipitate, wash with water, dry in vacuum at 50°C for 24 hours, and grind to obtain anatase nano-TiO 2 ;

[0055] (2) the anatase nano-TiO obtained in step (1) 2 Uniformly disperse in 50mL of acetic acid solution with pH ≤ 4 to make the mass concentration 0.3%, and ultrasonically oscillate for 30min to obtain stable nano-TiO 2 Dispersions;

[0056] (3) Add aldehyde-based chitosan (viscosity-average molecular weight is 10,900, deacetylation degree is 88.7%, C2, C3 position and C6 position aldehyde group content is 24.38%) in the acetic acid solution that volume concentration is 2%) stirring and dissolving , drop Span 8...

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Abstract

The invention discloses a photodynamic self-cleaning textile and a preparation method thereof, the photodynamic self-cleaning textile is prepared by the following steps: reacting a core-shell TiO2 aldehyde chitosan nanoparticle finishing liquid with a fabric, forming Schiff base, acetal bond and amido bond through aldehyde groups and amino groups in nanoparticles and amino groups, hydroxyl groups and carboxyl groups in the fabric, so that the nanoparticles are grafted on the surface of the fabric in a multi-site manner, and the photodynamic self-cleaning textile is obtained. The core-shell nanoparticles are uniformly dispersed in the fabric, have good stability and lasting antibacterial effect, and have strong ability to decompose stains on the surface of the fabric. The preparation process is simple and easy to implement, the cost is low, the controllability of reaction conditions is good, no cross-linking agent or auxiliary is used, the method is green and environmentally friendly, and the prepared core-shell TiO2 and aldehyde chitosan nanoparticle grafted fabric is soft, breathable, good in skin-friendly performance and durable in self-cleaning function and has huge market potential.

Description

technical field [0001] The invention relates to a photodynamic self-cleaning textile and a preparation method thereof, in particular to a technology of in-situ grafting of core-shell nanoparticles into textiles, which belongs to the technical field of functional textile preparation. Background technique [0002] With the improvement of people's living standards and the acceleration of the pace of work, functional textiles have gradually penetrated into various fields of daily life. Functional textiles based on nanomaterials have become a hot research direction, and are widely used in the fields of flame retardancy, antibacterial, superhydrophobic, self-cleaning, anti-ultraviolet and antistatic [Wu Fang, Ge Jinlong, Qin Yingyue, Li Zongqun, Li Qiulin. Nanomaterials Application research progress in the field of functional textiles. Journal of Changchun Normal University, 2021,40(8):71-76]. Nanomaterials show a unique nano-small size effect, and their chemical activity, biolog...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M23/12D06M15/03D06M11/46D06M10/00D06M10/06D06M10/10D06M101/06D06M101/10D06M101/12
CPCY02A50/30
Inventor 李日新许云辉郭仕豪许成刚丁文倩邓梦晴魏治国
Owner ANHUI AGRICULTURAL UNIVERSITY
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