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A silver/titanium oxide nanotube antifouling agent interfacially modified by polydopamine and a preparing method thereof

A technology of titanium oxide nanotubes and polydopamine is applied in the field of composite nanomaterials and their preparation, and can solve the problems of restricting the development of environment-friendly and high-efficiency composite nanomaterials, complicated operation process of chemical etching method, uncontrollable etching morphology, etc. Achieve the effects of high popularization and application value, significant long-term bacteriostasis, and simple and easy preparation method

Inactive Publication Date: 2015-01-07
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operation process of chemical etching method is complicated, the etched morphology is uncontrollable, it is easy to cause damage to the substrate, and a large amount of chemical waste liquid will be generated at the same time; and the modifiers commonly used in surface modification methods such as polyaniline, Silane coupling agents, etc. have strong toxicity, which will cause harm to the environment and human body, restricting the development of environmentally friendly and efficient composite nanomaterials

Method used

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  • A silver/titanium oxide nanotube antifouling agent interfacially modified by polydopamine and a preparing method thereof
  • A silver/titanium oxide nanotube antifouling agent interfacially modified by polydopamine and a preparing method thereof
  • A silver/titanium oxide nanotube antifouling agent interfacially modified by polydopamine and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] a. Preparation of titanium oxide powder

[0034] Add 30ml of tetrabutyl titanate to 105ml of absolute ethanol, stir for 25min, and mark the solution as solution A. Add 3ml of glacial acetic acid and 10ml of water to 105ml of absolute ethanol, mix well, and mark the solution as B solution. Slowly add liquid B to liquid A to prepare a transparent titanium oxide sol. The sol was left to stand for a period of time to obtain a gel. The prepared gel was placed in a constant temperature drying oven and dried at 80° C. for 12 hours to obtain a pale yellow xerogel. Finally, the dry gel was placed in a muffle furnace and calcined at 500°C for 4 hours, and the product was cooled to room temperature with the furnace. The XRD spectrum of the obtained titanium oxide powder is shown in figure 1 -a. As can be seen from the figure, each XRD diffraction spectrum peak of titanium oxide powder all corresponds to each diffraction spectrum peak of anatase type titanium oxide standard po...

Embodiment 2

[0042] a. Preparation of titanium oxide powder

[0043] Add 30ml of tetrabutyl titanate to 105ml of absolute ethanol, stir for 25min, and mark the solution as A solution. Add 3ml of glacial acetic acid and 10ml of water to 105ml of absolute ethanol, mix well, and mark the solution as B solution. Slowly add liquid B dropwise into liquid A to obtain a translucent titanium oxide sol. The sol was left to stand for a period of time to obtain a gel. The prepared gel was placed in a constant temperature drying oven and dried at 80° C. for 12 hours to obtain a pale yellow xerogel. Finally, the dry gel was placed in a muffle furnace and calcined at 500°C for 4 hours, and the product was cooled to room temperature with the furnace.

[0044] b. Preparation of titania nanotubes

[0045] Prepare 130ml of 10mol / L sodium hydroxide solution, add 0.5g of titanium oxide powder and mix evenly, move it into the lining of a hydrothermal kettle, seal it, place it in a constant temperature dryin...

Embodiment 3

[0051] a. Preparation of titanium oxide powder

[0052] Add 30ml of tetrabutyl titanate to 105ml of absolute ethanol, stir for 25min, and mark the solution as A solution. Add 3ml of glacial acetic acid and 10ml of water to 105ml of absolute ethanol, mix well, and mark the solution as B solution. Slowly add liquid B dropwise into liquid A to obtain a translucent titanium oxide sol. The sol was left to stand for a period of time to obtain a gel. The prepared gel was placed in a constant temperature drying oven and dried at 80° C. for 12 hours to obtain a pale yellow xerogel. Finally, the dry gel was placed in a muffle furnace and calcined at 500°C for 4 hours, and the product was cooled to room temperature with the furnace.

[0053] b. Preparation of titania nanotubes

[0054] Prepare 130ml of 10mol / L sodium hydroxide solution, add 0.5g of titanium oxide powder and mix evenly, move it into the lining of a hydrothermal kettle, seal it, place it in a constant temperature dryin...

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Abstract

A preparing method of a silver / titanium oxide nanotube antifouling agent interfacially modified by polydopamine is disclosed. The preparing method comprises following steps of: (1) preparing titanium oxide powder; (2) preparing titanium oxide nanotubes by adopting a hydrothermal method and by adopting the obtained titanium oxide powder as a reaction substrate; (3) modifying surfaces of the titanium oxide nanotubes by utilization of the polydopamine; (4) adding the obtained titanium oxide nanotubes the surfaces of which are modified with the polydopamine into a silver nitrate solution, and adsorbing silver ions by utilization of a vacuum adsorption method; (5) subjecting a precipitate product to centrifugal separation, and irradiating under ultraviolet light; and (6) adding the product irradiated by the ultraviolet light into the silver nitrate solution again, and repeating the step (4) and the step (5) for a plurality of times to finally obtain the antifouling agent. The preparing method is simple, feasible, mild in reaction conditions, low in equipment requirement, capable of large-scale production, and high in popularization and application value. The prepared antifouling agent has significant long-acting bacterial inhibiting effects for staphylococcus aureus, escherichia coli and vibrio anguillarum.

Description

technical field [0001] The invention relates to a composite nanomaterial and a preparation method thereof, in particular to a method for modifying the silver / titanium oxide nanotube interface by using dopamine as a modified material to enhance its antifouling timeliness, belonging to the technical field of nanoantibacterial materials . Background technique [0002] It is well known that biofouling of equipment used in the marine environment due to marine growth can significantly reduce its performance and lifespan. With the in-depth exploration and development of marine resources, the problems caused by marine biofouling have become increasingly prominent, prompting people to take various measures to prevent and control marine biofouling. For now, the use of antifouling agents to kill microorganisms such as marine bacteria and other fouling organisms and prevent them from adhering to the surface of materials is the most economical, effective and widely applicable method in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01P1/00C09C1/36C09C3/00C09C3/10C09C3/06
Inventor 王洪芬陈守刚魏璐瑶
Owner OCEAN UNIV OF CHINA
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