Photodynamic self-cleaning textile and preparation method thereof

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...

Examples

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...

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...

Examples

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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