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TSTO Patents

CN102321973
Silver coating compound and silver coating process for textile


Inventor(s):     FENGLI GUO; XIAODONG XU; GUOFU ZHOU +

The invention discloses a silver coating compound and a silver coating process for a textile. The silver coating compound comprises a silver coated textile body, and the silver coated on the silver coated textile is silver sesquioxide. The process comprises the following steps of: putting the textile into a solution of tetrasilver tetroxide, and keeping at the temperature of between 40 and 95DEG C for 20 to 120 minutes; (2) taking the textile out, and drying at the temperature of between 70 and 150DEG C for 5 to 150 minutes; (3) putting the dried textile into solutions of sodium (potassium) hydroxide and sodium (potassium) peroxydisulfate, and keeping at the temperature of between 40 and 95DEG C for 10 to 100 minutes; and (4) taking the textile out, washing with water for 2 to 3 times, and drying at the temperature of between 70 and 150DEG C to obtain the silver coated antibacterial textile. The invention has the advantages that: the silver sesquioxide coated on the silver coating compound for the textile is tervalent silver oxide with higher positive charge, which is formed by bonding the tetrasilver tetroxide and the textile to obtain a coordinate bond and further oxidizing, and the silver sesquioxide is more tightly bonded with the textile and has higher sterilizing capacity.

DESCRIPTION
[0001]

Technology area:
[0002]

The present invention relates to a textile containing silver compounds, particularly, the present invention is to design a textile containing silver compounds and silver craft.
[0003]

Background technique:
[0004]

Clothing Textiles and people's daily life most closely linked substance in first place, but often in contact with the outside world on clothing, parasitic microorganisms affect not only clothing above beauty and life, but more importantly, they are the main mode of transmission of human infectious diseases.

Now researchers found the culprit hospital infection after surgery is textiles (doctors and patients overalls clothes, inpatient bed sheets, etc.), so in practice the need to kill microorganisms textiles to meet the people's work and life demands.
[0005]

Silver as a bactericide already known two thousand years ago, the researchers based on the relative efficacy of different metals antimicrobial efficacy experiments were determined, arranged as follows:
[0006]

Ag> Hg> Cu> Cd> Ni> Co> Zn> Fe> Ca
[0007]

Silver also has the role of bactericidal activity involved in different valence bond forms, and now researchers have generally agreed that by studying the price of silver and its related disinfection, disinfection of high priced higher than low-cost silver (J.AM.CHEM.SOC.2009, 131,16147-16155; Burns 2007,33,139-148; East China University of Technology (Natural Science), 2008,34 (1), 86), namely Ag (III)> Ag (II)> Ag (I) > Ag, tetroxide four silver oxide from the silver nitrate, which is considered to be one of the earliest silver oxide (AgO), McMillan J A in 1960 that the substance is an oxide of a monovalent and trivalent silver.

U.S. Patent No. 5,223,149 announced the discovery of four silver tetroxide can further oxidized to the trivalent form, namely, two silver and silver oxide,
[0008]

Ag4O4 + 4NaOH + Na2S2O8 = 2Ag2O3 + 2Na2SO4 + 2H2O or
[0009]

Ag4O4 + 4KOH + K2S2O8 = 2Ag2O3 + 2K2SO4 + 2H2O
[0010]

Silver as the main component of the antimicrobial silver textiles are textiles is taken as a mature proven technology, it has now been widely used and a large number of listed products.

But most are using the following two techniques: one is formed by the adhesive and finishing agent silver ions or silver particles, in the fabric finishing process will be without its crossing to the fabric surface, such as a Chinese patent CN101048063A; another way is to use a reducing agent to the silver nitrate reduction to elemental nanosilver is now further into silver oxide.

These methods are solid silver low, low price of silver contained in the silver antibacterial poor.
[0011]

SUMMARY:
[0012]

Technical problems to be solved by the present invention is to provide a solid silver and antibacterial capabilities are strong in a textile containing silver compounds and silver craft.
[0013]

To solve the above problems, the present invention is achieved by the following technical solutions.
[0014]

This textile silver compounds include silver textile itself, the silver for the silver contained in the textile silver oxide.
[0015]

In order to adapt to a variety of textile range, the silver textiles knitted, circular woven fabrics, flat woven fabric, woven fabrics, non-woven fabric, yarn or omentum.
[0016]

In order to expand the sources of material, constituting the silver textile materials are natural fibers, synthetic fibers or mixtures thereof.
[0017]

In order to have a better understanding of the material, said natural fibers are cotton, wool, linen, silk, bamboo, leather and blended products; the synthetic fibers comprise polypropylene fibers (PP), polyacrylonitrile fibers (acrylic), polyvinyl formal fiber, synthetic fiber rings dimensional (vinylon), polyamide fibers (nylon), polyethylene terephthalate (PET).
[0018]

In order to develop the textile silver compound, the process steps are as follows: (1) take place textiles tetroxide four silver solution, and incubated at 40-95 ? 20-120 minutes; (2) Remove textiles 70-150 ? the drying 5-150 min; (3) placed in the drying textiles sodium (potassium) and sodium persulfate (potassium) was incubated at 40-95 ? 10-100 min; (4) Remove the textiles washed with water 2-3 times, drying to obtain silver antimicrobial textiles in the 70-150 ?.
[0019]

To form a solid silver and antibacterial textiles relatively strong silver compound, the textile is placed in the bath solution ratio 3-30:1; tetroxide four silver concentration solution as 50-2000ppm; sodium hydroxide ( potassium) was dissolved nights a concentration of 0.01% to 1%; sodium persulfate (potassium) was dissolved nights a concentration of 0.01% to 1%.
[0020]

Compared with the prior art, the usefulness of the present invention is: a silver oxide silver compound contained on this textile by tetroxide four silver and fabrics combine to form a coordination bond, after further oxidized with a positive higher electricity trivalent silver oxide, and fabric binding more tightly, sterilization ability.
[0021]

DETAILED DESCRIPTION:
[0022]

Below in conjunction with the specific embodiments of the present invention will be described in detail:
[0023]

This textile silver compounds include silver textile itself, the silver contained in the silver oxide silver textiles; this textile silver compound can be used in knit, circular woven fabrics, flat woven fabric, woven fabrics, non- textiles, yarn or omentum field; the silver textile materials are composed of natural fibers, synthetic fibers or mixtures thereof; further said that the natural fibers of cotton, wool, linen, silk, bamboo, leather and blended products; the synthetic fibers comprise polypropylene fibers (PP), polyacrylonitrile fibers (acrylic), polyvinyl formal fiber, synthetic fiber rings dimensional (vinylon), polyamide fibers (nylon), polyethylene terephthalate (PET); it's the process steps are:
[0024]

(1) take place textiles tetroxide four silver solution, and incubated at 40-95 ? 20-120 minutes;
[0025]

(2) Remove the textile drying at 70-150 ? 5-150 minutes;
[0026]

(3) placed in the drying textiles sodium (potassium) and sodium persulfate (potassium) was incubated at 40-95 ? 10-100 minutes;
[0027]

(4) Remove the textiles washed with water 2-3 times, drying to obtain silver antimicrobial textiles in the 70-150 ?.
[0028]

The solution is placed in a bath textiles ratio 3-30:1; four silver concentration tetroxide solution as 50-2000ppm; sodium (potassium) was dissolved nights a concentration of 0.01% to 1%; sodium persulfate (K) Night solution concentration of 0.01% to 1%.
[0029]

Implementation Case 1:
[0030]

Polyester 100g 500ml take place at a concentration of 0.1% tetroxide four silver solution, 95 ? incubated for 20 minutes, remove the textile at 120 ? drying 10 minutes; the drying textiles into 0.1% sodium hydroxide (potassium) and sodium persulfate (potassium) was 95 ? for 10 minutes, remove the textiles washed with water twice, 120 ? drying to obtain silver antimicrobial polyester fiber fabric.
[0031]

Guangdong Province Microbiology Testing Center antimicrobial testing, the silver wool fabric after washing 10 times against E. coli 8099 rate 92.36% inhibition against Staphylococcus aureus ATCC 6538 was 88.91% inhibition on Candida albicans ATCC10231 bacteria inhibitory rate of 70%.
[0032]

Implementation Case 2:
[0033]

Take cotton placed 100 concentration of 0.05% 2000ml tetroxide four silver solution, 70 ? incubated for 60 minutes at 110 ? drying textiles taken 100 minutes; the drying textiles into 0.08% sodium hydroxide (potassium) and sodium persulfate (potassium) was 80 ? incubated 100 minutes, remove the textiles with water 3 times, 90 ? drying to obtain silver antibacterial cotton fabric.
[0034]

Guangdong Province Microbiology Testing Center antimicrobial testing, after the silver wool fabric washing 20 times against E. coli 8099 was 82.36 percent inhibition of Staphylococcus aureus ATCC 6538 British inhibitory rate of 87.91%, against white Candida ATCC10231 antibacterial rate of 65%.
[0035]

Implementation case 3:
[0036]

Take 100g in 3000ml wool disposed a concentration of 0.01% by tetroxide four silver solution, 40 ? incubated for 120 minutes at 70 ? drying textiles taken 150 minutes; the drying textiles into 0.01% sodium hydroxide (potassium) and sodium persulfate (potassium) was 40 ? incubated 100 minutes, remove the textiles washed with water twice, 70 ? drying to obtain silver antibacterial wool fabric.
[0037]

Guangdong Province Microbiology Testing Center antimicrobial testing, the silver wool fabric after washing 50 times against E. coli 8099 rate 92.36% antibacterial, bacteriostatic Staphylococcus aureus ATCC 6538 rate of 97.91%, against white rosary ATCC10231 bacteria inhibitory rate of 75%.
[0038]

It is emphasized that: The above is only a preferred embodiment of the present invention, it is not the invention of any formal restrictions, all based on a simple modification of any technical essence of the invention made in the above example embodiment, equivalent changes and modifications are technology is still within the scope of the present invention.