CN117818191A - Biological protective clothing fabric capable of isolating and killing viruses and preparation method thereof - Google Patents
Biological protective clothing fabric capable of isolating and killing viruses and preparation method thereof Download PDFInfo
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- CN117818191A CN117818191A CN202311816091.1A CN202311816091A CN117818191A CN 117818191 A CN117818191 A CN 117818191A CN 202311816091 A CN202311816091 A CN 202311816091A CN 117818191 A CN117818191 A CN 117818191A
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- fabric
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- 230000001681 protective effect Effects 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 241000700605 Viruses Species 0.000 title claims abstract description 14
- 230000002147 killing effect Effects 0.000 title claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 38
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- 239000000243 solution Substances 0.000 claims description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
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- 229910021641 deionized water Inorganic materials 0.000 claims description 32
- 239000000976 ink Substances 0.000 claims description 32
- 239000002184 metal Substances 0.000 claims description 31
- 229910052751 metal Inorganic materials 0.000 claims description 31
- 229910052742 iron Inorganic materials 0.000 claims description 28
- JQWHASGSAFIOCM-UHFFFAOYSA-M sodium periodate Chemical compound [Na+].[O-]I(=O)(=O)=O JQWHASGSAFIOCM-UHFFFAOYSA-M 0.000 claims description 26
- 229920000728 polyester Polymers 0.000 claims description 24
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 claims description 22
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 claims description 21
- 239000001263 FEMA 3042 Substances 0.000 claims description 21
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 claims description 21
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 claims description 21
- 229940033123 tannic acid Drugs 0.000 claims description 21
- 235000015523 tannic acid Nutrition 0.000 claims description 21
- 229920002258 tannic acid Polymers 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 16
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 15
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 14
- QKNYBSVHEMOAJP-UHFFFAOYSA-N 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydron;chloride Chemical compound Cl.OCC(N)(CO)CO QKNYBSVHEMOAJP-UHFFFAOYSA-N 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- 238000007650 screen-printing Methods 0.000 claims description 13
- 239000002759 woven fabric Substances 0.000 claims description 13
- 239000007983 Tris buffer Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 claims description 12
- 229960003638 dopamine Drugs 0.000 claims description 11
- 238000001291 vacuum drying Methods 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 11
- 239000007853 buffer solution Substances 0.000 claims description 9
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- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims description 8
- 229960001149 dopamine hydrochloride Drugs 0.000 claims description 8
- 239000007800 oxidant agent Substances 0.000 claims description 8
- 235000019441 ethanol Nutrition 0.000 claims description 7
- 238000007731 hot pressing Methods 0.000 claims description 7
- 150000002739 metals Chemical class 0.000 claims description 7
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- 239000011780 sodium chloride Substances 0.000 claims description 7
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- 239000012535 impurity Substances 0.000 claims description 5
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- 238000007639 printing Methods 0.000 claims description 5
- 238000004659 sterilization and disinfection Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
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- 239000012528 membrane Substances 0.000 claims 2
- 229920000570 polyether Polymers 0.000 claims 2
- 229910002549 Fe–Cu Inorganic materials 0.000 claims 1
- 229920000433 Lyocell Polymers 0.000 claims 1
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- 230000003213 activating effect Effects 0.000 claims 1
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- IYRDVAUFQZOLSB-UHFFFAOYSA-N copper iron Chemical compound [Fe].[Cu] IYRDVAUFQZOLSB-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
The invention discloses a biological protective clothing fabric capable of isolating and killing viruses and a preparation method thereof, wherein the fabric consists of a surface layer, a core layer and an inner layer, the surface layer is terylene/PET fabric with a weak electric field, and is subjected to three-proofing arrangement of static resistance, blood resistance and alcohol resistance, hydrophobic property, oleophobic property and anti-fouling property, the core layer consists of a non-porous moisture-permeable TPU film subjected to moisture permeability modification, the inner layer consists of pure cotton spunlaced fabric or regenerated cellulose fiber spunlaced fabric subjected to hydrophilic moisture absorption and sweat conduction, and the three layers of fabrics are subjected to hot rolling bonding by adopting two layers of hot melt networks to form the composite fabric with a sandwich structure, and the fabric has the functions of isolating and sterilizing bacteria, viruses, static resistance, blood resistance, alcohol resistance, hydrophobicity, oleophobic property and anti-fouling property and can be used for biological protective clothing fabrics.
Description
1 technical field
The invention relates to the technical field of mask preparation processes, in particular to preparation of biological protective clothing fabric capable of isolating and killing viruses.
2 background art
Along with the horizontal blank of various viruses and germs, the protective clothing becomes indispensable equipment in various scenes, scientific researchers, medical staff, epidemic prevention staff and the like face the threat of high-risk microorganisms, and the life safety can be guaranteed only by providing the protective clothing with high-efficiency protective performance. Many kinds of protective clothing are available, but in order to isolate viruses, many protective clothing on the market usually abandons the comfort of a part of fabrics, and is made of non-porous materials, and the fabrics have a certain improvement on the safety performance of the protective clothing, but the protective effect is still insufficient, and the air permeability and the moisture permeability of the fabrics are poor. After the medical personnel wear the protective clothing, because of long-time high-strength work for the body fluid and the heat of wearer self accumulate in the internal, can't discharge soon, thereby make the temperature in the protective clothing too high, the environment is moist, is unfavorable for medical personnel's long-term wearing.
3 summary of the invention
The invention provides a biological protective clothing fabric capable of isolating and killing viruses and a preparation method thereof in order to overcome the problems in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
(1) Preparation of surface PET fabric:
pretreating polyester fiber, then modifying the obtained polyester fabric with tannic acid, wherein the solution is 0.1-0.4 g of Tris, 1-6 g of NaCl, 100-400 mL of deionized water and 2-6 mg/mL of tannic acid, and then immersing the obtained fabric. And washing the obtained polyester fabric with deionized water and drying. Iron ink was printed onto the resulting fabric and then dried in a vacuum oven. Printing copper ink on the fabric in the same manner, a patterned low-field fabric containing both metals can be obtained. And (3) filling the three-proofing finishing agent into a spray can, and spraying on one side of the back surface of the obtained weak electric field fabric containing the electrode pairs to obtain the surface layer PET fabric.
(2) The preparation method of the modified TPU nonporous moisture-permeable film comprises the following steps:
the TPU film is put into ethanol for ultrasonic washing, then modified solution is prepared, about 60-90 ml of Tris-HCl buffer solution is taken, and 0.1-0.5 g of dopamine hydrochloride is added for stirring and dissolution. About 0.2-1 g of ethyl orthosilicate is dissolved in absolute ethyl alcohol and added into the dopamine solution after stirring. And then adding 0.05-0.2 g of sodium periodate into the mixture to obtain the modified solution. Immersing the obtained TPU film into the prepared modification solution for reaction for a period of time, taking out, cleaning the TPU film by deionized water and absolute ethyl alcohol, and drying to obtain the modified TPU film
(3) Preparation of biological protective clothing fabric capable of isolating and killing viruses:
the composite fabric of the protective clothing is made of the surface PET fabric in the step (1), the modified TPU non-porous moisture-permeable film in the step (2) and the pure cotton spunlaced fabric through hot pressing of two hot melt net films.
The beneficial effects are that:
the protective clothing composite fabric prepared by the invention has the following beneficial effects: 1, the surface fabric can obtain sterilization capability after tannic acid treatment, and on the basis, an electric field obtained by printing a metal electrode on the prepared surface fabric is used for sterilization.
2 the core material, being non-porous, resists liquids from the outside and this can expel perspiration from the body. Both properties are greatly enhanced after modification.
In the step (1) of the present invention, the printed metal electrode can obtain the best electrical performance when being in a strip package.
Preferably, the best electrical performance is obtained when the metal content of the printed metal electrode in step (1) of the present invention is 20%.
Preferably, the sodium periodate as the oxidizing agent added in the present invention (2) can accelerate the modification reaction rate.
Preferably, the modification solution used in the present invention (2) is 80ml of Tris-HCl buffer solution, the dopamine hydrochloride used is 0.2g, the ethyl orthosilicate is 0.8g, the absolute ethanol is 20ml, and the sodium periodate is 0.1 g.
Preferably, the hot pressing temperature used in the step (3) is 100 ℃, the time is 15s, and the pressure is 0.6MPa.
The beneficial effects are that: the protective clothing composite fabric prepared by the invention can sterilize and disinfect through the surface fabric while being subjected to tannic acid disinfection and physical virus isolation. And can also obtain higher waterproof and moisture permeability, and has excellent protective performance and comfort performance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a structure of a composite fabric for protective clothing.
Fig. 2 is a stencil of a printed metal electrode.
Detailed Description
In order to describe the technical content, the constructional features, the achieved objects and effects of the present invention in detail, the following description will be made with reference to the embodiments.
Preparation of surface PET fabric:
first, two metal inks were prepared, 0.4g CMC-Na was weighed into a beaker, 40mL deionized water was added, and the solution was magnetically stirred until it was clear. Adding 20% of iron powder by mass fraction while stirring, manually stirring for 10min, adding 2.6g of AAE and 0.4g of SA, stirring for 10min, and performing ultrasonic treatment in an ultrasonic cell pulverizer for 30min to obtain uniform and fine iron ink. The copper ink is prepared by adding 2.2g of AAE and 0.8g of SA after adding 20% of iron copper powder by mass percent. Cutting the polyester woven fabric into a certain size, and ultrasonically cleaning the polyester woven fabric by using absolute ethyl alcohol. The treated fabric was then boiled with constant temperature and dried in a forced air drying oven to remove impurities from the fabric surface. The polyester fabric is then modified with tannic acid. First, 0.242g Tris and 3g NaCl and 200mL deionized water were added and placed in a beaker. 4mg/mL tannic acid was then added to the beaker and the pH of the solution was adjusted to 8.5. The resulting PET was then immersed and shaken in a 30℃water bath for 8h. After the reaction is completed, the fabric is washed by deionized water and dried in vacuum at 90 ℃ to obtain the electrostatic fabric. And finally, placing the fabric under a screen printing template, then taking a proper amount of prepared iron ink onto the screen, and carrying out screen printing on the fabric by using a soft scraper. And drying the iron electrode in a vacuum drying oven at 80 ℃ for 0.5h after the iron electrode is printed. The same copper ink was printed on the resulting iron-based cloth in the same manner to obtain a patterned weak field fabric containing both metals. Finally, spraying the three-proofing finishing agent on the surface of the reverse side of the electric field fabric by using a spray can, and drying the electric field fabric in a vacuum drying oven at 100 ℃ for 3min to obtain the final composite fabric.
Preparation of modified TPU non-porous moisture permeable film:
0.121g of Tris was added to every 100mL of deionized water and stirred until dissolved. Then, the pH of the solution was adjusted to 8.5 with 0.1mol/L HCl to obtain Tris-HCl buffer solution. The TPU film is put into ethanol for ultrasonic washing for 30min, and then is washed by deionized water, so that the clean TPU non-porous film can be obtained. 0.2g of dopamine hydrochloride was dissolved in 80mL Tris-HCl buffer. Then 0.8g of ethyl orthosilicate was dissolved with 40mL of absolute ethanol and added to the dopamine solution. Finally, 0.1g of sodium periodate as an oxidant was added to the obtained solution to obtain a modified solution. And (3) placing the obtained clean TPU non-porous film into a modified solution to react for 4 hours under the condition of water bath oscillation at 30 ℃. After the reaction is completed, absolute ethyl alcohol and deionized water are used for washing away substances on the surface of the modified TPU non-porous film.
Preparation of protective clothing composite fabric:
selecting a surface PET fabric, a modified TPU non-porous moisture-permeable film and pure cotton spunlaced fabric, and hot-pressing the two hot-melt net films to prepare the protective clothing composite fabric.
Example 1
Preparation of surface PET fabric:
firstly, preparing two metal inks, weighing 0.2g of CMC-Na in a beaker, adding 60mL of deionized water, and magnetically stirring until the solution is clear. Adding 10% of iron powder by mass fraction while stirring, manually stirring for 10min, adding 2.2g of AAE and 0.6g of SA, stirring for 10min, and performing ultrasonic treatment in an ultrasonic cell pulverizer for 30min to obtain uniform and fine iron ink. The copper ink is prepared by adding copper powder with the mass fraction of 10%, and then adding 2.8g of AAE and 0.4g of SA to obtain the copper ink. Cutting the polyester woven fabric into a certain size, and ultrasonically cleaning the polyester woven fabric by using absolute ethyl alcohol. The treated fabric was then boiled with constant temperature and dried in a forced air drying oven to remove impurities from the fabric surface. The polyester fabric is then modified with tannic acid. First, 0.1g Tris and 2g NaCl and 200mL deionized water were added and placed in a beaker. Then 3mg/mL tannic acid was added to the beaker and the pH of the solution was adjusted to 8.5. The resulting PET was then immersed and shaken in a 30℃water bath for 6h. After the reaction is completed, the fabric is washed by deionized water and dried in vacuum at 90 ℃ to obtain the electrostatic fabric. And finally, placing the fabric under a screen printing template, then taking a proper amount of prepared iron ink onto the screen, and carrying out screen printing on the fabric by using a soft scraper. And drying the iron electrode in a vacuum drying oven at 80 ℃ for 0.5h after the iron electrode is printed. The same copper ink was printed on the resulting iron-based cloth in the same manner to obtain a patterned weak field fabric containing both metals. Finally, spraying the three-proofing finishing agent on the surface of the reverse side of the electric field fabric by using a spray can, and drying the electric field fabric in a vacuum drying oven at 100 ℃ for 5min to obtain the final composite fabric.
Preparation of modified TPU non-porous moisture permeable film:
to each 120mL deionized water was added 0.3g Tris and stirred until dissolved. Then, the pH of the solution was adjusted to 8.5 with 0.2mol/L HCl to obtain Tris-HCl buffer solution. The TPU film is put into ethanol for ultrasonic washing for 40min, and then is washed by deionized water, so that the clean TPU non-porous film can be obtained. 0.3g of dopamine hydrochloride was dissolved in 60mL Tris-HCl buffer. Then 0.2g of ethyl orthosilicate was dissolved with 40mL of absolute ethanol and added to the dopamine solution. Finally, 0.1g of sodium periodate as an oxidant was added to the obtained solution to obtain a modified solution. And (3) placing the obtained clean TPU non-porous film into a modified solution to react for 5 hours under the condition of water bath oscillation at 30 ℃. After the reaction is completed, absolute ethyl alcohol and deionized water are used for washing away substances on the surface of the modified TPU non-porous film.
Preparation of protective clothing composite fabric:
selecting a surface PET fabric, a modified TPU non-porous moisture-permeable film and pure cotton spunlaced fabric, and hot-pressing the two hot-melt net films to prepare the protective clothing composite fabric.
Example 2
Preparation of surface PET fabric:
first, two metal inks were prepared, 0.4g CMC-Na was weighed into a beaker, 30mL deionized water was added, and the solution was magnetically stirred until it was clear. Adding 20% of iron powder by mass fraction while stirring, manually stirring for 10min, adding 2.8g of AAE and 0.8g of SA, stirring for 15min, and performing ultrasonic treatment in an ultrasonic cell pulverizer for 30min to obtain uniform and fine iron ink. The copper ink is prepared by adding 2.9g of AAE and 0.5g of SA after adding 20% of iron copper powder by mass percent. Cutting the polyester woven fabric into a certain size, and ultrasonically cleaning the polyester woven fabric by using absolute ethyl alcohol. The treated fabric was then boiled with constant temperature and dried in a forced air drying oven to remove impurities from the fabric surface. The polyester fabric is then modified with tannic acid. First, 0.3g Tris and 4g NaCl were added and 150mL deionized water was placed in a beaker. Then 5mg/mL tannic acid was added to the beaker and the pH of the solution was adjusted to 8.5. The resulting PET was then immersed and shaken in a 30℃water bath for 7h. After the reaction is completed, the fabric is washed by deionized water and dried in vacuum at 90 ℃ to obtain the electrostatic fabric. And finally, placing the fabric under a screen printing template, then taking a proper amount of prepared iron ink onto the screen, and carrying out screen printing on the fabric by using a soft scraper. And drying the iron electrode in a vacuum drying oven at 80 ℃ for 0.5h after the iron electrode is printed. The same copper ink was printed on the resulting iron-based cloth in the same manner to obtain a patterned weak field fabric containing both metals. Finally, spraying the three-proofing finishing agent on the surface of the reverse side of the electric field fabric by using a spray can, and drying the electric field fabric in a vacuum drying oven at 90 ℃ for 8min to obtain the final composite fabric.
Preparation of modified TPU non-porous moisture permeable film:
0.4g of Tris was added to every 130mL of deionized water and stirred until dissolved. Then, the pH of the solution was adjusted to 8.5 with 0.25mol/L HCl to obtain Tris-HCl buffer solution. The TPU film is put into ethanol for ultrasonic washing for 50min, and then is washed by deionized water, so that the clean TPU non-porous film can be obtained. 0.4g of dopamine hydrochloride was dissolved in 80mL Tris-HCl buffer. Then 0.4g of ethyl orthosilicate was dissolved with 50mL of absolute ethanol and added to the dopamine solution. Finally, 0.3g of sodium periodate as an oxidant was added to the obtained solution to obtain a modified solution. And (3) placing the obtained clean TPU non-porous film into a modified solution to react for 6 hours under the condition of water bath oscillation at 30 ℃. After the reaction is completed, absolute ethyl alcohol and deionized water are used for washing away substances on the surface of the modified TPU non-porous film.
Preparation of protective clothing composite fabric:
selecting a surface PET fabric, a modified TPU non-porous moisture-permeable film and pure cotton spunlaced fabric, and hot-pressing the two hot-melt net films to prepare the protective clothing composite fabric.
Example 3
Preparation of surface PET fabric:
first, two metal inks were prepared, 0.6g CMC-Na was weighed into a beaker, 40mL deionized water was added, and the solution was magnetically stirred until it was clear. Adding 10% of iron powder by mass fraction while stirring, manually stirring for 15min, adding 3g of AAE and 1g of SA, stirring for 20min, and performing ultrasonic treatment in an ultrasonic cell pulverizer for 40min to obtain uniform and fine iron ink. The copper ink is prepared by adding 3g of AAE and 1g of SA after adding copper powder with the mass fraction of 20 percent. Cutting the polyester woven fabric into a certain size, and ultrasonically cleaning the polyester woven fabric by using absolute ethyl alcohol. The treated fabric was then boiled with constant temperature and dried in a forced air drying oven to remove impurities from the fabric surface. The polyester fabric is then modified with tannic acid. First, 0.4g Tris and 6g NaCl and 200mL deionized water were added and placed in a beaker. Then 6mg/mL tannic acid was added to the beaker and the pH of the solution was adjusted to 8.5. The resulting PET was then immersed and shaken in a 30℃water bath for 8h. After the reaction is completed, the fabric is washed by deionized water and dried in vacuum at 90 ℃ to obtain the electrostatic fabric. And finally, placing the fabric under a screen printing template, then taking a proper amount of prepared iron ink onto the screen, and carrying out screen printing on the fabric by using a soft scraper. And drying the iron electrode in a vacuum drying oven at 80 ℃ for 1h after the iron electrode is printed. The same copper ink was printed on the resulting iron-based cloth in the same manner to obtain a patterned weak field fabric containing both metals. Finally, spraying the three-proofing finishing agent on the surface of the reverse side of the electric field fabric by using a spray can, and drying the electric field fabric in a vacuum drying oven at 90 ℃ for 8min to obtain the final composite fabric.
Preparation of modified TPU non-porous moisture permeable film:
to each 140mL of deionized water was added 0.5g of Tris and stirred until dissolved. Then, the pH of the solution was adjusted to 8.5 with 0.3mol/L HCl to obtain Tris-HCl buffer solution. The TPU film is put into ethanol for ultrasonic washing for 55min, and then is washed by deionized water, so that the clean TPU non-porous film can be obtained. 0.5g of dopamine hydrochloride was dissolved in 90mL Tris-HCl buffer. Then 0.8g of ethyl orthosilicate was dissolved with 60mL of absolute ethanol and added to the dopamine solution. Finally, 0.35g of sodium periodate as an oxidant was added to the obtained solution to obtain a modified solution. And (3) placing the obtained clean TPU non-porous film into a modified solution to react for 6 hours under the condition of water bath oscillation at 30 ℃. After the reaction is completed, absolute ethyl alcohol and deionized water are used for washing away substances on the surface of the modified TPU non-porous film.
Preparation of protective clothing composite fabric:
selecting a surface PET fabric, a modified TPU non-porous moisture-permeable film and pure cotton spunlaced fabric, and hot-pressing the two hot-melt net films to prepare the protective clothing composite fabric.
Table 1 protective properties of composite fabric for protective clothing
As can be seen from the experimental data in Table 1, the tannic acid impregnated surface layer material has better antibacterial performance than the polyester fabric which is not treated. When the metal electrode is printed, the obtained weak electric field fabric has higher inhibition effect on bacteria. This further demonstrates the strong inhibitory effect of tannic acid and weak electric fields on bacterial growth. Meanwhile, the surface layer weak electric field fabric manufactured by the method has good antibacterial effect.
TABLE 2 influence of TEOS addition on the moisture permeability of TPU modified films
Experimental data show that after the TPU film is modified by the dopamine, the moisture permeability of the TPU modified film is obviously increased compared with that of the TPU original film, the moisture permeability of the modified film is increased and then reduced along with the increase of the modification time, the addition of the oxidant SP can effectively promote the oxidation self-polymerization reaction rate of the dopamine, and the deposition of the polydopamine on the film surface is accelerated, so that the moisture permeability of the film is improved in a short time. Under the same modification time condition, the moisture permeability of the TPU film is further improved by throwing the TEOS, the moisture permeability of the modified TPU film is also increased along with the increase of the throwing amount of the TEOS, and the moisture permeability is also increased along with the increase of the common modification time, but the change of the moisture permeability is gradually gentle and even reduced along with the longer the time. At the time of modification for 8 hours, the moisture permeability of the modified polyurethane has reached 19854g/m 2 d, 4.3 times of the moisture permeability of the TPU original film. After compounding, the moisture permeability of the compound fabric is 13956g/m 2 d, the moisture permeability reduction rate is 29.7%, the biological protective clothing fabric still has good moisture permeability effect and good protective performance, the filtering efficiency of NaCl aerosol with the size of more than 0.3 microns is 97.456%, the hydrostatic pressure resistance value is 22.57kPa, the static half life is 0.42s, the anti-wetting grade is 4-5, the anti-synthetic blood penetration grade is 6, and Phi-X174 bacteriophage with the diameter of 0.027 microns cannot penetrate, and the biological protective clothing fabric prepared by the research has very high mechanical property, thermal wet comfort (the moisture permeability is 3-6 times of that of imported biological protective clothing fabric), antistatic property and surface moisture resistance.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.
Claims (10)
1. The surface layer is made of PET fabric with weak electric field, and is subjected to antistatic, blood-proof, alcohol-proof three-proofing finishing, hydrophobic, oleophobic and anti-fouling double-oleophobic-resistant finishing, the core layer is made of a non-porous moisture-permeable TPU film subjected to moisture permeability modification, the inner layer is made of hydrophilic moisture-absorbing and sweat-conducting pure cotton spunlaced cloth or regenerated cellulose fiber spunlaced cloth, and the three layers of cloth are subjected to hot rolling and bonding by adopting two layers of hot melt nets to form the composite fabric with a sandwich structure, and the composite fabric has the functions of isolating, sterilizing, resisting viruses, resisting static, resisting blood, resisting alcohol, resisting water, oleophobic and resisting fouling, and the preparation method comprises the following steps:
(1) Pre-cleaning polyester fabrics; (2) Carrying out tannic acid dipping pretreatment on the surface polyester fabric by using tannic acid, carrying out screen printing finishing on the surface fabric by adopting two metal inks capable of forming a weak electric field, and carrying out the three-proofing finishing and the amphiphobic first-resistance finishing; (3) The non-porous moisture-permeable TPU film is subjected to moisture-permeable modification by sodium periodate, dopamine and tetraethoxysilane; (4) And hot-rolling and bonding the three layers of cloth by using a hot-melt net film.
2. The biological protective clothing fabric for isolating and killing viruses and the preparation method thereof as claimed in claim 1, wherein the surface PET fabric/polyester fabric is selected from the gram weight range of 80-105 g/m 2 The polyester fabric comprises the following specific preparation process flows:
polyester fabric- & gt pre-cleaning- & gt tannic acid soaking- & gt tannic acid activating and modifying polyester woven fabric- & gt double-electrode weak electric field antibacterial and antivirus finishing (two metal ink screen printing- & gt multifunctional finishing (three-proofing finishing and amphiphobic and anti-finishing- & gt surface layer polyester/PET fabric.
3. The surface layer PET fabric according to step 1 (1) in claim 1 and claim 2 is characterized by having the functions of sterilization, disinfection, three prevention and double-hydrophobic primary resistance, and the pre-cleaning steps of the surface layer terylene/PET fabric are as follows: cutting the terylene woven fabric into a certain size, firstly using absolute ethyl alcohol to ultrasonically clean the terylene woven fabric at room temperature for 10-20 min, then boiling the terylene woven fabric at 50-70 ℃ for 20-40 min, and drying the terylene woven fabric at 50-70 ℃ for 20-40 min in a blast drying oven to remove impurities on the surface of the terylene woven fabric.
4. The surface PET face fabric of step 1 (2) of claim 1 and claim 2, wherein the tannic acid impregnating solution is prepared from the following components: 0.1-0.4 g of Tris, 2-6 g of NaCl, 100-400 mL of deionized water and 2-6 mg/mL of tannic acid, regulating the pH value to be slightly alkaline 7.5-10, immersing the terylene/PET fabric into a water bath with the temperature of 20-40 ℃ for oscillating for 6-10 hours, washing with the deionized water for three times after the reaction is finished, and vacuum drying at the temperature of 50-80 ℃.
5. The step (2) of claim 1 and the skin PET facestock of claim 2, wherein the inks of the metal pairs used are selected to be two metals having a significant difference in reactivity, including but not limited to Fe-Cu, zn-Fe, cu-Zn.
The preparation method of the metal ink comprises the following steps: 50ml of deionized water and 0.2-0.6 g of CMC-Na are taken and magnetically stirred in a beaker until the solution is clear; 13-17 mL of CMC-Na dispersion prepared above is measured, a volumetric flask with proper capacity is introduced, iron powder with the diameter of 50-100 nm is added while magnetic stirring, and finally 2.2-3.0 g of AAE and 0.4-1.2 g of SA are added, and ultrasonic treatment is carried out in an ultrasonic cell grinder to obtain uniform and fine iron ink; the second metal powder adopts nanometer copper powder with the diameter of 50-100 nm, and the preparation method and steps of the copper ink are the same as those of the iron ink.
The printing method of the metal electrode pair is as follows: placing the terylene/PET fabric subjected to cleaning (claim 3) and tannic acid pretreatment (claim 4) under a screen printing template, taking a proper amount of prepared iron ink onto the screen, performing screen printing by using a soft scraper, and drying in a vacuum drying oven at 80-120 ℃ for 20-60 min after the iron electrode printing is finished, thereby obtaining the iron electrode array structure on the surface of the terylene fabric. And then continuously placing the terylene/PET fabric printed with the iron electrode under a screen printing template, adjusting the distance according to the requirement (see claim 6), taking the prepared copper ink for screen printing, obtaining a copper electrode array on the surface of the terylene/PET fabric, and drying the terylene/PET fabric in a vacuum drying oven at 80-120 ℃ for 20-60 min after printing, so as to obtain the patterned weak electric field fabric containing two metals.
6. The surface polyester/PET fabric according to step (2) of claim 1 and claim 2, wherein the printed metal electrode is composed of a metal pair staggered lattice structure, comprising two metal lattice structures and a metal strip array structure, wherein the shape of the metal points is dots or other geometric shapes, such as triangles, quadrilaterals and various polygons, the distance between the metal point array structures is 1-10 mm, the diameter of the metal points is 1-10 mm, and the lattice design can obtain isotropic weak electric field fabric; the strip interval of the metal strip array structure is 1-10 mm, the strip length is 20mm or longer, the bandwidth is 1-5 mm, and the strip design can obtain anisotropic weak electric field fabric.
7. The step (3) of claim 1 and the core TPU non-porous moisture permeable film of claim 2, wherein said core is made from a commercially available polyether type common TPU non-porous moisture permeable film modified by moisture permeation by the following method:
under the weak base condition of pH 7.5-10, the self-polymerization reaction of Dopamine (DA) and the hydrolysis reaction of tetraethyl orthosilicate (TEOS) are carried out under the condition of existence of oxidant Sodium Periodate (SP), so that the polyether type thermoplastic TPU film is jointly modified, and the moisture permeability of the TPU non-porous moisture-permeable film can be improved, and the specific process flow is as follows:
pre-cleaning TPU film, preparing Tris-HCl buffer solution, adding dopamine hydrochloride (DA), adding tetraethyl orthosilicate (TEOS) ethanol solution, adding oxidant Sodium Periodate (SP), placing the cleaned TPU film, carrying out light-proof reaction modification, flushing, spreading and drying, and carrying out moisture permeability modification on the TPU film.
8. Step (3) according to claim 1 and core TPU non-porous and moisture permeable membranes according to claims 2 and 7, wherein the Tris-HCl buffer is prepared by the following method: adding 0.08-0.5 g of Tris into 80-120 ml of deionized water, stirring until the Tris is dissolved, and then adjusting the pH of the buffer solution to 7.5-10 by using 0.05-0.2 mol/L of HCl solution;
adding 0.1-0.5 g of dopamine hydrochloride into 80ml of Tris-HCl buffer solution, stirring and dissolving, adding 20ml of ethyl orthosilicate with the concentration of 0.01-0.04 g/ml, adding 0.05-0.20 g of sodium periodate, and stirring until dissolving to obtain the modified solution of the TPU non-porous moisture-permeable membrane.
9. The core layer according to the step (3) in claim 1 and the claims 2 and 7 is a moisture permeable modified TPU non-porous moisture permeable film, which is characterized in that the non-porous moisture permeable TPU film is put into the modified liquid prepared in claim 8, and reacts for 7 to 10 hours in a dark place under the condition of water bath oscillation at 20 to 40 ℃, after the reaction is finished, the modified film is firstly washed for 2 to 5 times by absolute ethyl alcohol, and then is repeatedly washed by a large amount of deionized water to remove unreacted substances, and then is paved and dried to obtain the moisture permeable modified TPU non-porous moisture permeable film.
10. The method for preparing the biological protective clothing fabric for isolating and killing viruses according to the step (4) in claim 1 and the method for preparing the biological protective clothing fabric for isolating and killing viruses according to claim 2, which is characterized in that the gram weight range is 20-40 g/m 2 Pure cotton spunlaced cloth or regenerated cellulose spunlaced cloth (including but not limited to viscose, modal, fu and Tencel) with spunlaced modes including plain web spunlaced and/or cylinder web spunlaced, plain web spunlaced and/or jacquard spunlaced; the selective gram weight of the hot melt net film is 15-30 g/m 2 The two commercial hot melt net films are subjected to hot pressing conditions, wherein the temperature is 80-120 ℃, the time is 7-15 s, and the pressure is 0.5-0.8 MPa.
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