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Supercritical fluid preparation method of nano-silver-coated textile fabric

A technology of textile fabrics and nano-silver, which is applied in textiles and papermaking, liquid-repellent fibers, fiber treatment, etc., can solve the problems of preparing nano-silver-plated textiles with supercritical fluids, and achieve low cost, high fastness, High binding effect

Inactive Publication Date: 2016-09-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the research mainly focuses on the conventional chemical preparation process of nano-silver particles, and there is no report of one-step preparation of nano-silver coated textiles with supercritical fluid.

Method used

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  • Supercritical fluid preparation method of nano-silver-coated textile fabric
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  • Supercritical fluid preparation method of nano-silver-coated textile fabric

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preparation example Construction

[0025] The invention provides a method for preparing nano-silver plated textile fabrics with supercritical carbon dioxide, which is characterized in that the raw materials include silver nitrate, a reducing agent, a stabilizer and textile fabrics, wherein the mass ratio of the reducing agent to silver nitrate is 500-50, The mass ratio of stabilizer to silver nitrate is 0.1-10, and the mass of silver nitrate used per square meter of textile fabric is 5g-50g.

[0026] The textile fabric is at least one of natural fiber fabric or chemically synthesized textile fabric.

[0027] Preferably, the textile fabric is at least one of cotton, wool, linen, silk, polyester, viscose, polyester or acrylic.

[0028] The silver salt is silver nitrate, silver oxalate, silver succinimide.

[0029] The reducing agent is sodium citrate, sodium borohydride, ethylene glycol, reducing sugar, organic phosphorus.

[0030] The stabilizer is sodium citrate, polyvinylpyrrolidone, sodium lauryl sulfate, p...

Embodiment 1

[0038] The wool fabric with a size of 5cm×5cm was ultrasonically cleaned with acetone and ethanol for 15 minutes, taken out and dried; 0.1g of silver nitrate and 0.1g of polyvinylpyrrolidone were dissolved in 30ml of ethylene glycol solution, and stirred for 30min. The resulting solution was added to the reaction kettle together with the woolen cloth sample, stirred and treated with supercritical carbon dioxide at 10Mpa and 70°C for 60 minutes, then taken out, washed with water and dried.

[0039] The microstructure and macroscopic performance of gained nano-silver plating wool fabric are as follows:

[0040] 1. Morphology of nano-silver particles:

[0041] figure 1 Scanning electron microscope (SEM) photographs of nanosilver-coated wool fabrics. Depend on figure 1 It can be seen that the nano-silver particles are deposited on the wool fiber surface very uniformly, and the nano-silver particles are in the shape of spherical particles.

[0042] 2. UV transmittance under dif...

Embodiment 2

[0051] The wool fabric with a size of 5cm×5cm was ultrasonically cleaned with acetone and ethanol for 15 minutes, taken out and dried; 0.1g of silver nitrate and 0.1g of polyvinylpyrrolidone were dissolved in 30ml of ethylene glycol solution, and stirred for 30min. The resulting solution is added to the reaction kettle together with the woolen cloth sample, stirred and treated with supercritical carbon dioxide under the condition of 8-14Mpa and 70°C for 20-80min, then taken out, washed with water and dried.

[0052] 1. The contact angle of nano-silver coated wool fabric under different carbon dioxide pressures:

[0053] Figure 4 It is the nano-silver plated fabric prepared under different carbon dioxide pressure conditions in Example 2 of the present invention, as seen from the figure, other conditions are the same, and the contact angle of the nano-silver plated wool fabric prepared under different carbon dioxide conditions increases first as pressure increases. Decrease af...

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Abstract

The invention belongs to the field of multifunctional textile fabrics, and particularly relates to a nano-silver-coated textile fabric which has the multiple functions such as the catalytic degradation property, the ultraviolet resistance and the water repellency. The invention further provides a preparation method of the nano-silver-coated textile fabric. The nano-silver-coated textile fabric is prepared from silver nitrate, a reducing agent, a stabilizing agent and a textile fabric, wherein the mass ratio of the reducing agent to silver nitrate is 500-50, the mass ratio of the stabilizing agent to silver nitrate is 0.1-10, and 5 g-50 g of silver nitrate is used in every square meter of the textile fabric. According to the preparation method, the nano-silver-coated textile fabric is prepared by adopting a supercritical fluid technique, the textile fabric is treated for 10-100 min under the condition that the pressure is 7 Mpa-30 Mpa and the temperature is 20 DEG C-100 DEG C and then taken out, washed and dried. The textile surface is obtained by depositing nano-silver in supercritical carbon dioxide, the advantages of being environmentally friendly, high in production efficiency and nano-silver binding force, good in repeatability and the like are achieved, and the obtained nano-silver-coated textile fabric as the functions such as the catalytic degradation property, the ultraviolet resistance and the water repellency.

Description

technical field [0001] The invention belongs to the field of multifunctional textile fabrics, and in particular relates to the preparation of nanometer silver-plated functional textile fabrics by supercritical carbon dioxide. Background technique [0002] Nano-silver plated textiles refer to the plating of nano-silver particles on the surface of textiles by physical and chemical methods. Silver nanoparticles have unique catalytic properties, excellent biocompatibility and Good sensitivity, so nano-silver is plated on the surface of textiles, so that textiles have low-temperature superconductivity, anti-static, catalytic degradation, antibacterial, anti-ultraviolet, water repellency, electromagnetic shielding and other effects, thereby increasing the application field of textiles, For example, military electromagnetic shielding, medical antibacterial, household super water repellency, outdoor sports anti-ultraviolet, environmental protection and ecological catalytic degradat...

Claims

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Application Information

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IPC IPC(8): D06M11/83D06M23/00
CPCD06M11/83D06M23/00D06M2101/12D06M2200/12D06M2200/25
Inventor 郭荣辉彭灵慧兰建武
Owner SICHUAN UNIV
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