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Preparation method of modified MMT (montmorillonite)/ZnO/GQDs (graphene quantum dots) nano-composite antibacterial agent

A nanocomposite and antibacterial agent technology is applied in the field of preparation of modified MMT/ZnO/GQDs nanocomposite antibacterial agents, which can solve the problems of unsatisfactory antibacterial activity of modified MMT and achieve high antibacterial activity, good biocompatibility, Resistant effect

Active Publication Date: 2018-12-25
上海鹏图抗菌新材料有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the antibacterial activity of modified MMT itself is not ideal

Method used

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  • Preparation method of modified MMT (montmorillonite)/ZnO/GQDs (graphene quantum dots) nano-composite antibacterial agent
  • Preparation method of modified MMT (montmorillonite)/ZnO/GQDs (graphene quantum dots) nano-composite antibacterial agent
  • Preparation method of modified MMT (montmorillonite)/ZnO/GQDs (graphene quantum dots) nano-composite antibacterial agent

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preparation example Construction

[0027] A preparation method of modified MMT / ZnO / GQDs nanocomposite antibacterial agent, comprising the following steps:

[0028] Step 1: Preparation of modified montmorillonite (modified MMT):

[0029] Weigh 5-20g sodium-based montmorillonite and disperse in 200ml deionized water, stir at 80°C for 30min at high speed; disperse 2-14g modifier in 50ml deionized water, after it is completely dissolved, add sodium-based montmorillonite In the dispersion, stir at 80°C for 2 hours at a high speed, let it stand for 2 hours to cool down, and then use a vacuum filter device to repeatedly filter it, dry it, and grind it to obtain the modified montmorillonite (modified MMT);

[0030] Step 2: Preparation of GQDs solution:

[0031] Put 1-10g of citric acid (CA) into a 50ml beaker, heat and react to obtain an orange liquid; then, adjust the pH to 7.0 with aqueous sodium hydroxide solution, dialyze for 24 hours, and rotate to evaporate to obtain the GQDs solution;

[0032] Step 3: Preparat...

Embodiment 1

[0043] Step 1: Preparation of modified montmorillonite (modified MMT):

[0044] Weigh 8.5g of sodium montmorillonite and disperse it in 200ml of deionized water, stir at 80°C for 30min at high speed; In the base montmorillonite dispersion, stir at 80°C for 2 hours at high speed, let it stand for 2 hours to cool down, and then use a vacuum filter to filter it repeatedly, dry it at 100°C for 24 hours, and grind it into a fine powder to obtain the modified Montmorillonite;

[0045] Step 2: Preparation of GQDs solution:

[0046] Take 4g of citric acid (CA) into a 50ml beaker, heat to 200°C and react for 30 minutes to obtain an orange liquid; then, adjust the pH to 7.0 with aqueous sodium hydroxide solution, dialyze for 24 hours, and rotate to evaporate to obtain the GQDs solution;

[0047] Step 3: Preparation of modified MMT / ZnO / GQDs composite nanocomposite antibacterial agent:

[0048] Add 0.65g of sodium hydroxide into 50ml of ethanol solution, stir magnetically for 30min, an...

Embodiment 2

[0050] Step 1: Preparation of modified montmorillonite (modified MMT):

[0051]Weigh 12.0g of sodium montmorillonite and disperse it in 200ml of deionized water, stir at 80°C for 30min at high speed; In the base montmorillonite dispersion, stir at 80°C for 2 hours at high speed, let it stand for 2 hours to cool down, and then use a vacuum filter to filter it repeatedly, dry it at 100°C for 24 hours, and grind it into a fine powder to obtain the modified Montmorillonite;

[0052] Step 2: Preparation of GQDs solution:

[0053] Take 2g of citric acid (CA) into a 50ml beaker, heat to 200°C and react for 30 minutes to obtain an orange liquid; then, adjust the pH to 7.0 with aqueous sodium hydroxide solution, dialyze for 24 hours, and rotate to evaporate to obtain the GQDs solution;

[0054] Step 3: Preparation of modified MMT / ZnO / GQDs composite nanocomposite antibacterial agent:

[0055] Add 0.75g of sodium hydroxide into 50ml of ethanol solution, stir magnetically for 30min, an...

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Abstract

The invention relates to a preparation method of a modified MMT / ZnO / GQDs nano-composite antibacterial agent. The preparation method of the modified MMT / ZnO / GQDs nano-composite antibacterial agent comprises dispersing Na-montmorillonite into deionized water, and then stirring the mixture at high speed; dispersing modifier into deionized water, after the modifier is fully dissolved, adding the mixture into the Na-montmorillonite dispersion mixture, and then performing high-speed stirring, standing, cooling, suction filtration, drying and grinding treatment to obtain modified montmorillonite (modified MMT); heating citric acid to obtain an orange solution; regulating the pH of the orange solution through sodium hydroxide solution, and performing dialysis and rotary evaporation to obtain GQDssolution; adding an alkali source into ethyl alcohol, and performing magnetic stirring to obtain a solution A: adding a zinc source into ethyl alcohol, performing magnetic stirring, then adding in theGQDs solution and performing ultrasonic treatment; adding in the modified MMT, and then performing water bath reaction; adding in the solution A for reaction for 20 min, then performing heating reaction, and cooling, washing and centrifuging reaction products to obtain the modified MMT / ZnO / GQDs nano-composite antibacterial agent. The prepared modified MMT / ZnO / GQDs nano-composite antibacterial agent has the advantages of being safe, environmentally friendly, high in tolerance and the like.

Description

technical field [0001] The invention relates to the research of a novel high-efficiency antibacterial agent, in particular to a preparation method of a modified MMT / ZnO / GQDs nanocomposite antibacterial agent. Background technique [0002] In recent years, due to the irrational exploitation of resources, the resources are scarce and the natural environment has been damaged, leading to diseases caused by various pathogenic bacteria, fungi and viruses that threaten human health. The research and development of various antibacterial agents has become a current research hotspot, among which inorganic antibacterial materials are favored because of their good safety, durability, chemical stability, and low cost. [0003] Montmorillonite (MMT), also known as jiaolingite and microcrystalline kaolinite, is a natural mineral of silicate. It is the main mineral component of bentonite ore. It has the advantages of abundant sources and low price. Montmorillonite is a nanomaterial with a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N25/08B01J23/06B82Y20/00B82Y30/00B82Y40/00A01P1/00
CPCA01N25/08A01N59/16B82Y20/00B82Y30/00B82Y40/00B01J23/06B01J35/39
Inventor 刘俊莉邵建真王宇涵马建中刘辉罗艺土张凯涛
Owner 上海鹏图抗菌新材料有限公司
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