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Non-dissolution type long-acting antibacterial protective non-woven fabric and preparation method and application thereof

A non-woven, long-lasting technology that can be used in applications, protective clothing, textiles, and papermaking. It can solve problems such as insufficient interception, short service life, and weak virus killing, and achieve improved antibacterial efficiency and good air permeability. , the effect of prolonging the use time

Active Publication Date: 2020-07-17
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of insufficient interception, weak killing of viruses, and short service life of existing protective non-woven fabrics, the present invention adopts molecular bonding and surface directional loading technology, combined with high-valent ion charging method, on the surface of polymer fibers The polysiloxane layer is bonded by chemical bonds, and highly active quaternary ammonium salts, nano-silver and other antibacterial substances are directional loaded on the polysiloxane layer, and the molecular binding force between the non-woven fiber and the antibacterial substance is enhanced through the polysiloxane layer. Form a long-lasting, durable, and ultra-thin antimicrobial active layer on the surface of the fiber material, while improving the antibacterial efficiency, prolong the use time of the polymer fiber, and maintain the good air permeability of the fiber, and prepare a non-eluting long-acting Antibacterial Medical Nonwovens

Method used

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  • Non-dissolution type long-acting antibacterial protective non-woven fabric and preparation method and application thereof
  • Non-dissolution type long-acting antibacterial protective non-woven fabric and preparation method and application thereof
  • Non-dissolution type long-acting antibacterial protective non-woven fabric and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]Preparation and antibacterial properties of nano-silver sol

[0045] Add 5 mL each of 0.1 mol / L silver nitrate solution and 0.4 mol / L glucose solution dropwise into 40 mL of PVP / EG solution with a concentration of 30 mg / mL, and stir evenly. Vacuumize and fill with nitrogen, and carry out reflux reaction at 150°C for 2 hours. The solution is yellow and gradually deepens, so as to prepare the required nano-silver colloid type I. The silver concentration is 1.1mg / mL, and the particle size of the nano-silver gel is Less than 20nm, see attached figure 2 .

[0046] After diluting the nano-silver gel type Ⅰ by 10 times, the nano-silver gel type Ⅱ was obtained, and the antibacterial properties of the two nano-silver gels were tested, and the results are shown in Table 1. It can be seen from Table 1 that after the nano-silver gel was diluted 10 times, its antibacterial rate decreased slightly, but its antibacterial performance remained almost unchanged at about 99.7%.

[0047...

Embodiment 2

[0049] Preparation and antibacterial properties of embodiment 2 nanometer silver sol

[0050] Add 5 mL of 0.1 mol / L silver nitrate solution, 4 mL each of 0.1 mol / L vitamin C and 0.4 mol / L glucose solution into 40 mL of PVP / EG solution with a concentration of 30 mg / mL, and stir evenly. Vacuumize and fill with nitrogen, and carry out reflux reaction at 150 °C for 2 hours. The solution is yellow and gradually deepens, thereby preparing the required nano-silver colloid. The silver concentration is 1.1 mg / mL, and the particle size of the nano-silver gel is less than 20 Nano, see attached for details figure 2 .

[0051] With reference to GB15979-2002, the nano silver gel was tested for antibacterial performance, and the test results are shown in Table 2. Table 2 shows: compared with the control group, the total number of colonies in the nano-silver gel test group is very small, with a bacteriostatic rate as high as 99%, indicating that it has excellent bacteriostatic properties. ...

Embodiment 3

[0055] Preparation of antibacterial protective mask and its antibacterial performance test. Configure antibacterial liquid according to the following formula: nano silver gel 0.001% (calculated by silver concentration), octadecyl quaternary ammonium chloride 2%, octadecyl quaternary ammonium bromide 3%, 3[trimethoxysilyl] Propyldimethyloctadecylammonium chloride 2%, dimethyldichlorosilane 8%, phenylchlorosilane 2%, propylene glycol concentration 2%, and pure water as the balance.

[0056] The protective non-woven fabric of the mask is used as a raw material to make a 3-layer non-woven fabric mask, and the inner layer is treated with hydrophilic treatment (25g / m 2 ), the middle layer is melt-blown cloth (30g / m 2 ), the outer layer is a hydrophobic layer (20g / m 2 ), take the three-layer non-woven fabric 17.5mm×19.5mm of the size used as a mask, and spray the antibacterial liquid evenly on the protective non-woven fabric with a sprayer according to the amount of 30-40 g / square ...

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Abstract

The invention belongs to the technical field of antibacterial materials, and discloses a non-dissolution type long-acting antibacterial protective non-woven fabric and a preparation method and application thereof. The preparation method comprises the following steps that antibacterial liquid is evenly sprayed on a non-woven fabric or the non-woven fabric is soaked in the antibacterial liquid, andorganic silicon molecular polymerization is carried out to enhance the binding force of non-woven fabric fiber and antibacterial active substances; and high-temperature setting is performed, and the antibacterial active substances such as ammonium salt and nano-silver are loaded on the surface of the non-woven fabric in a directional mode to prepare the antibacterial protective non-woven fabric, wherein the antibacterial liquid comprises nano-silver gel, quaternary ammonium salt, organic silicon, an auxiliary agent and water. According to the method, the high-activity quaternary ammonium saltand the nano-silver are loaded on the surface of the non-woven fabric fiber to form an ultra-thin positively charged antibacterial layer through chemical bonding of the organic silicon on the surfaceof the polymer fiber, the structure of the non-woven fabric fiber is basically not damaged, the good air permeability is maintained, meanwhile, the rejection rate of the protective non-woven fabric can be remarkably improved, and masks prepared from the non-woven fabric can be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of antibacterial materials, and in particular relates to the preparation of a non-dissolving long-acting antibacterial protective non-woven fabric and its application in protective masks. Background technique [0002] Non-woven fabrics, also known as non-woven fabrics, use short fibers or filaments to be oriented or randomly arranged to form a fiber network structure, and then reinforced by mechanical, thermal bonding or chemical methods to obtain non-woven fabrics. Non-woven fabrics have the characteristics of moisture-proof, breathable, flexible, light weight, non-combustible, easy to decompose, non-toxic and non-irritating, rich in color, low in price, and recyclable, so they are widely used in medical and health, family clothing and other industries . Among them, in the medical and health industry, medical consumables such as disposable masks, protective clothing, surgical gowns, isolation gowns, lab co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/643D06M11/83D06M13/463D06M13/513B32B5/02B32B5/26B32B33/00A41D13/11A41D31/14A41D31/30B22F1/00B22F9/24B82Y30/00B82Y40/00
CPCD06M15/643D06M11/83D06M13/463D06M13/513D06M16/00B32B5/022B32B5/26B32B33/00A41D13/11A41D31/305A41D31/145B22F9/24B82Y30/00B82Y40/00B32B2260/021B32B2307/7145B32B2307/724B22F1/054
Inventor 肖凯军龚胜银玉容
Owner SOUTH CHINA UNIV OF TECH
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