Meishen Technology Company
The research shows that magnesium oxide is easily hydrated and forms a
layer of magnesium hydroxide on the surface. The dissolved oxygen in the
solution generates reactive oxygen ions through a single electron reduction
reaction.
The surface of magnesium oxide is coated with hydroxide ions. Due to the
chemical stability of oxygen in alkaline environment, high concentration of
reactive oxygen ions can exist on the surface of magnesium oxide.
Reactive oxygen ions, however, have strong oxidability and can destroy the
peptide bond structure of the membrane wall of bacteria, thus killing bacteria
rapidly.
In addition, nanometer magnesium oxide particles can produce destructive
adsorption, may also destroy the bacterial cell membrane.
Such antibacterial mechanism can overcome the deficiency of silver
antibacterial agent's slow action, easy to change color and titanium dioxide
antibacterial agent's need of ultraviolet irradiation.
At present, there are mainly two development paths for magnesium oxide antibacterial
materials:
Firstly, the antibacterial properties of nanometer magnesium oxide were
improved by controlling particle size and morphology characteristics.
For example, scientists have successfully developed a scaly nanoparticle
magnesium oxide powder that is highly antibacterial against anthrax,
staphylococcus, Escherichia coli and other bacteria.
Secondly, a new composite was developed by combining magnesium oxide with
other antibacterial materials.
Antibacterial material.
There are mainly activated carbon/magnesium oxide, metal oxide/magnesium
oxide and chlorine gas, bromine gas/magnesium oxide and so on.
Nano magnesium oxide powder dispersed uniformly on activated carbon matrix
has good antibacterial property against Staphylococcus aureus.
Chlorine, a halogen gas, is a strong fungicide, but it is highly toxic and
has high vapor pressure, so it cannot be used alone. It can form a stable
magnesium oxide/halogen gas system by strong adsorption on the surface of
magnesium oxide, so it can be used safely and efficiently.
In the metal oxide compound.
In the aspect of antibacterial agent, magnesium oxide/titanium dioxide
composite powders were prepared by chemical co-deposition method, and the
antibacterial mechanism was studied: titanium dioxide photocatalyzed the
formation of electron hole under the action of ultraviolet light, but it was
easy to compound and lost its photocatalytic and antibacterial properties.
The electron surface of magnesium oxide has defects, which can accept
electrons and holes, thus inhibiting photogenic electron hole recombination,
increasing photocatalytic efficiency and improving antibacterial property.
In production practice, nano magnesium oxide has important applications in
the development of many antibacterial materials such as antibacterial ceramics
and antibacterial plastics
Meishen is the world's leading producer of magnesium oxide, Magnesium
oxide is an oxide of magnesium, an ionic compound. It is a white solid at room
temperature. Magnesium oxide exists in the form of periclase in nature and is a
raw material for magnesium smelting. Magnesium oxide is white or light yellow
powder, odorless, tasteless, this product is insoluble in water and ethanol,
melting point 2852 ° C, boiling point 3600 ° C, magnesium oxide has high
refractory insulation properties. It can be converted into crystal by burning
at a temperature above 1000 ° C. If it rises above 1500 ° C, it will form a
burnt magnesia or sintered magnesia.
Magnesium oxide can be used in the manufacture of metallurgy, smelting,
advanced magnesia bricks, refractory materials and moisturizing materials. It
is also widely used in rubber, rubber sheet, rubber products, pharmaceutical
industry, food industry, plastic sheet accelerator, glass fiber reinforced
plastics and Surface coating of silicon steel sheet, paper production, steel
ball polishing, leather treatment, insulation materials, grease, dyes,
ceramics, desiccant, resin, flame retardant, etc.
Hebei Meishen Chemical Technology Group is the main magnesium oxide
producer in the world. It is also the largest magnesium salt producer in China
and has won the ISO9002 quality system certification. It also has
GMP-Certification.
With rich experience in the research, development, production, management
and operation of magnesium oxide products, Meishen Group has always attached
great importance to the research and development of new products and strict
requirements on product quality. Meishen has a high-level sales team. The
business covers more than 20 countries and regions around the world. It is
widely welcomed by new and old customers.
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