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Iron-doped molybdenum disulfide coating material and preparation method and application thereof

A molybdenum disulfide, coating material technology, applied in coatings, antifouling/underwater coatings, metal material coating processes, etc., can solve problems such as hidden dangers, affecting the normal physiological process of tissue cells, and narrow light wavelength range, etc. Achieve the effect of improving the antibacterial effect, avoiding potential safety hazards and application problems

Active Publication Date: 2019-03-15
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, there are literatures showing that silver nanoparticles can enter host cells through endocytosis, affecting the normal physiological process of tissue cells, and there is a great potential safety hazard (Applied SurfaceScience 2014,311:582-592)
Titanium dioxide antibacterial materials need to use its photocatalytic activity, but the wide band gap makes it possible to use a relatively narrow range of light wavelengths
However, the traditional preparation of the molybdenum disulfide layer on the surface of the substrate adopts chemical vapor deposition or physical vapor deposition, and the process is relatively complicated.

Method used

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  • Iron-doped molybdenum disulfide coating material and preparation method and application thereof
  • Iron-doped molybdenum disulfide coating material and preparation method and application thereof
  • Iron-doped molybdenum disulfide coating material and preparation method and application thereof

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preparation example Construction

[0044] As an example, further describe the preparation method of the iron-doped molybdenum disulfide coating, including: cleaning the titanium or titanium alloy through oxalic acid pickling and placing it in the reactor, using (a) sulfur source, (b ) molybdenum source, (c) iron source, (d) mixed aqueous solution or hydrosol of chelating agent as hydrothermal medium for hydrothermal treatment. Wherein, the reaction temperature is 180-220°C, the reaction time is 4-8 hours, and it is the best to keep the filling degree of the reactor at 50-75% in the whole process; the sulfur source is thiourea, thioacetamide, cysteine , sodium sulfide, potassium sulfide, etc. The source of molybdenum is sodium molybdate dihydrate, ammonium paramolybdate hexahydrate or ammonium thiomolybdate, etc. The source of iron can be soluble salts of iron (II) or iron (III) such as Ferric chloride, ferrous sulfate or ferrous ammonium sulfate, etc. The chelating agent can be ethylenediaminetetraacetic acid, ...

Embodiment 1

[0048] Treat a titanium sheet with a thickness of 1mm and a length and width of 10mm with 10% oxalic acid solution at 80°C for 2 hours, then rinse it with a large amount of deionized water, and then use alcohol and deionized water to clean it ultrasonically, each time for 15 minutes , to obtain titanium (o-Ti) treated with oxalic acid. Then carry out hydrothermal treatment, add 0.6g CS(NH 2 ) 2 , 0.28g (NH 4 ) 6 Mo 7 o 24 ·6H 2 O, 0.28g FeSO 4 ·7H 2 O and 0.37g disodium edetate (C 10 h 14 N 2 Na 2 o 8 2H 2 O), after ultrasonic dissolution, transfer to a 100mL PPL hydrothermal reaction kettle, the hydrothermal temperature is 200°C, and the time is 5h. Rinse and sonicate with a large amount of deionized water after water heating;

[0049] figure 1 (o-Ti-MoS 2 -Fe) is the low-power (b) and high-power (a) scanning electron microscope pictures of the iron-doped molybdenum disulfide coating material morphology on the surface of the titanium sheet obtained through t...

Embodiment 2

[0051] Antibacterial experiments were carried out on the materials prepared in Example 1, and the titanium alloy treated with oxalic acid in Example 1 was used as a control (marked as o-Ti): all samples were sterilized by a volume fraction of 75% alcohol solution and ultraviolet radiation. After the sample was dried, the bacteria solution with a concentration of 107 CFU / mL was dropped on the surface of the sample in the sterilizer (0.05 mL / cm 2 ), and then put the sample dripped with the bacterial solution into a 37°C constant temperature incubator for 24h. The samples cultivated for 24 hours were taken out, fixed with 2.5% glutaraldehyde solution by volume fraction, dehydrated and dried by gradient alcohol solution and hexamethyldisilazane solution, and observed under scanning electron microscope.

[0052] Figure 5 For the antibacterial results of Escherichia coli and Staphylococcus aureus by the iron-doped molybdenum disulfide coating obtained after the above-mentioned emb...

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Abstract

The invention relates to an iron-doped molybdenum disulfide coating material and a preparation method and application thereof. The iron-doped molybdenum disulfide coating material comprises molybdenumdisulfide nanosheets which grow on the surface of a metal substrate in situ and are doped with an iron element, and the doping content of the iron element in the iron-doped molybdenum disulfide coating material is 1-4wt%. An iron-doped molybdenum disulfide layer is constructed on the surface of medical titanium alloy, and thus, the antibacterial effect is improved obviously.

Description

technical field [0001] The invention relates to an iron-doped molybdenum disulfide coating material and its preparation method and application, belonging to the technical field of metal material surface modification. Background technique [0002] Pathogenic microorganisms such as bacteria and fungi often cause lesions in body tissues and pose a threat to human health. Medical antibacterial materials have received more and more attention. Medical antibacterial materials can be mainly divided into two categories: organic and inorganic antibacterial materials. Antibiotics are the most common organic antibacterial materials. However, excessive use of antibiotics will lead to the increase of bacterial resistance, making the problem more difficult. Another major category of organic antibacterial materials, polymer antibacterial agents have short service life and are prone to failure, which limits their application range. At present, researchers have developed metal antibacterial...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/14C23C18/12
CPCC09D1/00C09D5/14C23C18/1204C23C18/1241
Inventor 曹辉亮唐楷为刘宣勇
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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