Hebei Messi Biology Co., Ltd. said that highly dispersed nano-magnesium hydroxide is widely used in antimicrobial agent, acidic wastewater neutralizer, filler in paper industry, precursor of magnesium oxide, neutralizer in pharmaceutical industry, fertilizer additives, and new type of flame retardant. Because there are many kinds of magnesium hydroxide shape, there are needle type, tube type, fiber type, sheet type, stick type and even petal type, the structure determines the nature, so the application fields of different shapes are also different.
Nano magnesium hydroxide can be used as an antibacterial agent, mainly affecting the activity of bacteria, the mechanism is that the nanoparticles directly penetrate the cell membrane into the matrix, destroying the proteins and leading to apoptosis. In addition, magnesium hydroxide nanoparticles are heavily adsorbed on the cell surface and absorb water. That is, when the nanoparticles come into contact with bacteria, the bacteria endocytose the particles, and due to the presence of a large amount of water in the cell, the magnesium hydroxide dissolves internally, releasing a large amount of hydroxide, and the highly alkaline environment coupled with the destruction of the membranous structure aggravates the apoptosis of the cell. The antimicrobial activity of magnesium hydroxide nanosheets can be improved by irradiating them with UV light for a certain period of time.
Purification of wastewater is a novel application prospect for magnesium hydroxide. Due to its adsorptive and coagulative properties, wastes can be deposited in the wastewater, forming a gel to be removed by adsorption. Use magnesium salt and alkali direct precipitation, strict control of the reaction process. Magnesium nitrate or magnesium sulfate of appropriate concentration was selected and mixed with caustic soda to obtain magnesium hydroxide with a diameter of 712 nm and a specific surface area of 269 mlg (after calcination). Due to the high adsorption property of magnesium hydroxide, this product is suitable for application in the field of wastewater purification or water protection. Magnesium hydroxide can be used as a flocculant in wastewater containing dyes, as well as mixed in kaolin to adsorb cadmium ions, and in combination with saponite to adsorb phosphates.
Magnesium hydroxide is used in the preservation of paper. External factors such as oxygen, ozone, haze, humidity, light, heat and other environmental factors aggravate the aging of paper. The acidity of the environment also affects the preservation of paper due to its production, which is enriched with a large amount of aluminum sulfate, resin-based adhesives, and wood fibers. Magnesium hydroxide reduces cellulose acidity, keeping the paper neutral or slightly alkaline. In addition magnesium hydroxide can penetrate wood fibers and combine with acid roots to achieve a neutralizing effect, thus reducing the natural aging process of paper.
Magnesium hydroxide nanoparticles were modified onto the electrode surface as an ethanol concentration sensor. This sensor detects ethanol at a concentration of 10 M and has no signal when no ethanol is present. A signal was detected when 50 μL of ethanol was added to a buffer solution of 0.1 MpH of 7 disodium hydrogen phosphate.
Combining biological grade polymers with inorganic and organic materials at the nanoscale. Starch as an inexpensive and easily available polymer from crops was doped into magnesium hydroxide precipitates with different concentrations of starch matrix.SEM characterization showed good dispersion and interfacial adsorption of magnesium hydroxide in the starch matrix. The homogeneous dispersion and hydrophilicity of magnesium hydroxide can increase the tension and elasticity of the membrane. Although high concentration of magnesium hydroxide can cause agglomeration of crystals, it can also enhance the thermal stability of the material. In addition, starch and nano magnesium hydroxide are non-toxic and harmless raw materials, which have a better prospect in the future market.