Composite and method of preparing same

A technology of complexes and complexes, applied in the field of complexes, which can solve problems such as the difficulty of preparing and dispersing inorganic compounds

Pending Publication Date: 2021-10-22
AGENCY FOR SCI TECH & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these types of inorganic complexes present difficulties in formulating and dispersing into various matrices

Method used

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  • Composite and method of preparing same
  • Composite and method of preparing same
  • Composite and method of preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] Embodiment 1: the synthesis of carboxylic acid activated zinc powder (complex A)

[0109] Fresh zinc powder (2 g) and benzoic acid (0.2 g) were mixed in N,N-dimethylformamide (20 ml), and the mixture was stirred at 100° C. for 20 hours. After cooling to room temperature, the solid residue of complex A was collected by filtration and washed with acetone. The particle size range of the synthesized Complex A was measured to be from about 400 nm to 1,000 nm.

[0110] A schematic representation of the structure of the complex formed is shown in figure 1 , wherein in this case zinc is present in the core 100 and carboxylate is present in the protective layer 200 . from Figure 2A It can be seen that the deposited benzoic acid layer reacts with the zinc core to form a uniform shell of zinc benzoate on the zinc metal particles. The thickness of the protective layer depends on parameters such as the amount of carboxylic acid used and the reaction temperature and duration. ...

Embodiment 2

[0112] Embodiment 2: the synthesis of amino acid activated zinc powder (complex B)

[0113] Fresh zinc powder (2 g) was mixed with histidine (0.1 g) in ethanol (0.2 ml), and the mixture was stirred at 120°C for 24 hours. After cooling to room temperature, the solid residue of complex B was collected. The particle size range of the synthesized Complex B was measured to be about 400 nm to 1,000 nm.

[0114] A schematic representation of the structure of the complex formed is shown in figure 1 , wherein in this case zinc is present in the core 100 and histidine is present in the protective layer 200 in the form of a zinc-histidine complex. From Figure 2B It can be seen that the deposited histidine layer reacts with the zinc core to form a uniform shell of zinc-histidine complex on the zinc metal particles. Figure 3B The presence of a protective layer influenced by the precursor histidine is further confirmed, with the shell-covered zinc particles clearly observed in the figu...

Embodiment 3

[0115] Embodiment 3: the synthesis of inorganic acid activated titanium powder (composite C)

[0116] Fresh titanium powder (1 g) was mixed with concentrated phosphoric acid (0.03 ml), and the mixture was stirred at 130°C for 6 hours. After cooling to room temperature, the solid residue of complex C was collected. The particle size range of the synthesized Complex C was measured to be about 400 nm to 1,000 nm.

[0117] A schematic representation of the structure of the complex formed is shown in figure 1 , where in this case titanium is present in the core 100 and a hydrated metal oxide salt is present in the protective layer 200 . From Figure 2C It can be seen that the deposited phosphoric acid layer reacts with the titanium core to form a uniform shell of titanium oxide phosphate hydrate on the titanium metal particles. Figure 3C The presence of a protective layer influenced by the precursor phosphoric acid is further confirmed, where the shell covering the titanium p...

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Abstract

There is provided a composite comprising an inorganic metal or alloy core at least partially covered by a protection layer comprising a carboxylate salt, a metal oxide, a metal oxide salt or a metal-amino acid complex. There is also provided a method of preparing the composite comprising an inorganic metal or alloy core at least partially covered by a protection layer comprising a carboxylate salt, a metal oxide, a metal oxide salt or a metal-amino acid complex, comprising the step of mixing a metal or alloy with an acid, at elevated temperature for a time duration, optionally in the presence of a solvent. There is also provided use of a composite as an antimicrobial agent, and uses of a composite in the treatment or prophylaxis of microbial infection. There is also provided a method of inhibiting microbial activity or treating a microbial infection or disease comprising administering an antimicrobial composition comprising said composite as disclosed herein to a subject or applying the antimicrobial composition on a surface.

Description

[0001] References to related applications [0002] This application claims priority to Singapore Application No. 10201902068U filed on 7 March 2019, the disclosure of which is incorporated herein by reference. technical field [0003] The present invention relates to a compound, its preparation method and its application. Background technique [0004] Microbial infections and the development of antimicrobial resistance have been recognized as one of the most critical issues facing public health and safety. Creating clean antimicrobial surfaces with long-term stability and activity has a wide range of applications involving almost all aspects of daily life, such as medical devices, hospital surfaces, textiles, packaging, appliances, marine antifouling, filters and public surfaces. [0005] Inorganic antimicrobial materials, especially semiconductor antimicrobial materials, are less susceptible to chemical contamination and have long-term stability. Some metals or metal oxi...

Claims

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Application Information

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IPC IPC(8): B01J13/02C09D5/14A01N25/28A01P1/00
CPCC09D5/14A01P1/00A01P3/00A01N25/26B01J13/02B01J13/06A01N59/00A01N59/16C09D7/62A01N25/12A61K33/06C08K9/02A61K33/30A61K33/26A61K9/5015C08K9/04A61K33/32
Inventor 张玉根王金泉
Owner AGENCY FOR SCI TECH & RES
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