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Nano antibacterial material and preparation method and application thereof

A technology of nano-antibacterial materials and nano-composite materials, which is applied in rayon manufacturing, textile and paper making, and resistance to vector-borne diseases, etc., can solve the problems of powder or granular antibacterial materials falling off easily, wasting energy, wasting human and financial resources, etc. Achieve powerful killing ability, avoid easy falling off, and the effect of simple steps

Active Publication Date: 2022-01-28
NANJING MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of material still has the following defects: (1) the synthesis process is complicated, which wastes human and financial resources; (2) the photothermal performance is not ideal, and energy is wasted (such as high-power near-infrared laser irradiation) to achieve the desired effect; (3) Powder or granular antibacterial materials are easy to fall off, making it difficult to continuously sterilize

Method used

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  • Nano antibacterial material and preparation method and application thereof
  • Nano antibacterial material and preparation method and application thereof
  • Nano antibacterial material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This example is to prepare molybdenum disulfide-lipoic acid-chitooligosaccharide nanocomposite material, polyvinyl alcohol-molybdenum disulfide-lipoic acid-chitooligosaccharide nanofiber membrane.

[0036] The basic preparation process of this embodiment includes:

[0037] The first step is to use molybdenum disulfide nanoflowers; the molybdenum disulfide nanoflowers are uniformly dispersed in absolute ethanol by ultrasound, and α-lipoic acid is added to it, and the reaction is stirred; after the reaction, the reaction solution is centrifuged and the supernatant is removed and vacuum freeze-dry the obtained solid matter after washing to obtain molybdenum disulfide-lipoic acid nanocomposite material.

[0038] The second step is to take the obtained molybdenum disulfide-lipoic acid nanocomposite material, ultrasonically disperse it in absolute ethanol, and add a coupling agent to activate it; after that, add the solution formed by dissolving chitosan oligosaccharide in de...

Embodiment 2

[0052] This embodiment adopts the molybdenum disulfide-lipoic acid-chitooligosaccharide nanocomposite material (MoS 2 -LA-COS) for multiple tests. The following is the example of MoS prepared in Example 1 2 - LA-COS test results.

[0053] figure 2 for MoS 2 - Scanning electron microscope (SEM) and EDS energy spectrum analysis and elemental distribution diagram of LA-COS. It can be seen from the figure that the MoS 2 - The surface of LA-COS is rough and has a certain thickness, but still maintains MoS 2 Petal shape. EDS energy spectrum analysis and element distribution map show that MoS 2 -LA-COS is mainly composed of Mo, S, C, N and other elements, confirming the existence of COS in MoS 2 surface.

[0054] image 3 for MoS 2 -LA-COS and each control group (MoS 2 , LA, COS, MoS 2 -LA) Fourier transform infrared spectrum and XPS full spectrum. In the Fourier transform infrared spectrum, MoS 2 -LA-COS has a new C=O characteristic peak at 1720 wavenumber, indicatin...

Embodiment 3

[0057] This embodiment adopts the molybdenum disulfide-lipoic acid-chitooligosaccharide nanocomposite material (MoS 2 -LA-COS) was used for photothermal antibacterial detection, and the molybdenum disulfide nanoflowers used in Example 1 were used as a comparison.

[0058] The following is the example of MoS prepared in Example 1 2 -LA-COS, and the petal-shaped nano-MoS used in this example 2 Tested as a comparison.

[0059] Petal-like nano-MoS 2 、MoS 2 -LA-COS nanocomposites were dispersed in deionized water, and the photothermal effect was systematically tested under 808nm near-infrared light. Such as Figure 4 As shown in Figure A, under the irradiation of 808nm near-infrared laser, at each fixed power density (0.8w / cm 2 , 1.3w / cm 2 , 1.8w / cm 2 ), MoS 2 -The photothermal effect of LA-COS nanocomposites increases with the concentration (25μg / mL, 50μg / mL, 100μg / mL); 2 -When the concentration of the LA-COS nanocomposite material (25μg / mL), the photothermal effect incr...

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Abstract

The invention relates to a nano antibacterial material and a preparation method and application thereof. The preparation method comprises the following steps: reacting molybdenum disulfide nanoflowers with alpha-lipoic acid to obtain a molybdenum disulfide-lipoic acid nano composite material; reacting the molybdenum disulfide-lipoic acid nano composite material with chitosan oligosaccharide under the action of a coupling agent to obtain a molybdenum disulfide-lipoic acid-chitosan oligosaccharide nano composite material; and further dispersing the molybdenum disulfide-lipoic acid-chitosan oligosaccharide nano composite material in deionized water, adding polyvinyl alcohol, performing electrostatic spinning, drying and crosslinking to obtain the polyvinyl alcohol-molybdenum disulfide-lipoic acid-chitosan oligosaccharide nano fiber membrane. The molybdenum disulfide-lipoic acid-chitosan oligosaccharide nano composite material and the polyvinyl alcohol-molybdenum disulfide-lipoic acid-chitosan oligosaccharide nano fiber membrane disclosed by the invention have broad-spectrum antibacterial performance and have strong killing capability on bacteria, and can be applied to rapid photo-thermal sterilization of personal hygiene products such as masks.

Description

technical field [0001] The invention relates to a method for preparing a nano antibacterial material. The nano antibacterial material prepared by the method and its application belong to the field of nano material and microorganism application and the technical field of antibacterial preparations. Background technique [0002] As far as the applicant knows, among the existing nano-antibacterial materials, there is a class of materials that generate light and heat under near-infrared laser irradiation for antibacterial use. Using this material for antibacterial can avoid the risk of bacterial strain resistance caused by the use of antibiotics. However, this kind of material still has the following defects: (1) the synthesis process is complicated, which wastes human and financial resources; (2) the photothermal performance is not ideal, and energy is wasted (such as high-power near-infrared laser irradiation) to achieve the desired effect; (3) Powder or granular antibacterial...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00D01F6/50D01F1/10
CPCD04H1/728D01D5/0015D01F6/50D01F1/103Y02A50/30
Inventor 陈进徐其兰张李蔡铃柳玉辉陈峰曹玥姜慧君
Owner NANJING MEDICAL UNIV
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