Abstract: This paper expounds the principle and function of negative ion paint, its characteristics and preparation method. It is pointed out that negative ion coatings have broad application prospects.
Key words: water-based coatings; negative ion coatings; environmentally friendly coatings
0 Preface
As we all know, people spend 70% of their time indoors, so the cleanliness of indoor air will directly affect people's health. In recent years, with the continuous improvement of people's living standards and living environment, interior decoration has become increasingly luxurious and beautiful. At the same time, there are more and more problems affecting human health due to indoor pollution caused by decoration. The survey shows that: 68% of diseases The cause is related to indoor air pollution, and 80% of cancers are related to the living environment. Therefore, to effectively and permanently purify indoor harmful gases and maintain a fresh and healthy living and working environment has become an increasingly urgent goal for people to pursue. The advent of negative ion coatings has brought good news to mankind, allowing people to truly enjoy fresh and healthy air in their living rooms. This series of coatings not only has a decorative protective effect, but also can continuously release negative ions, thereby increasing the concentration of negative ions in the air and achieving the purpose of improving the environment.
1 The working principle and function of negative ion paint
1.1 The role of negative ions
When people walk in the forest, waterfall or beach, they will feel the air is fresh and happy, this is because the concentration of negative ions in these places is relatively high. The relationship between negative ion concentration and human health is shown in Table 1.
It is understood that when the concentration of negative ions reaches 10,000/cm3 or more, it can cure diseases; when the concentration of negative ions reaches 2,000-10,000/cm3 in mountains and seasides, it can prevent the occurrence of diseases; in urban park environments, the concentration of negative ions is only It is necessary to maintain health; residential buildings in cities are the cause of some diseases; air-conditioned residences can cause air-conditioning diseases. Therefore, negative ion coatings will become a popular product in the new generation of architectural coatings.
1.2 The working principle of negative ion paint
Negative ion paint is to add a kind of natural ore (tourmaline) to ordinary paint. Its structure is polar crystal, with long-term electrodes, and can emit 4~14μm far infrared rays at room temperature. The thermal effect of far-infrared rays can cause a series of physiological effects in the human body, activate the activity of biological macromolecules, promote and improve blood circulation, enhance metabolism, improve immune function, eliminate fatigue, stabilize the autonomic nervous system, and detoxify oxygen free radicals in organisms , body fluids are weakly alkaline, prolong life, known as "longevity in the atmosphere". Another important feature of the tourmaline is that it can release negative ions automatically and for a long time, and the concentration of negative ions produced can be as high as 10,000/cm3 or more. Negatively charged ions combine with tiny water molecules in the air to form hydroxyl negative oxygen ions (H3O2-).
1.3 The function of negative ion paint
Negative ion paint has environmental protection and health functions. Its environmental protection function is to continuously release a large amount of negative ions through the long-term electric field formed by special negative ion mineral crystals, and increase the concentration of negative ions in the indoor air; the health function is that the negative ion paint can effectively remove formaldehyde, toluene, and ammonia in the air. , cigarettes, oil smoke and other harmful pollution; kill and inhibit bacteria, viruses, eliminate odors; radiate far-infrared rays that are beneficial to human health, comprehensively and permanently purify indoor air, enhance human immunity, and prevent various diseases.
The advantages of negative ions beneficial to human health are summarized as follows: (1) activate human cells; (2) lower blood pressure, purify blood, and enhance myocardial function; (3) improve sleep, restore physical strength, and promote metabolism; (4) stabilize the autonomic nervous system, so that Human hormone tends to be balanced; (5) Improve lung and airway function. After inhaling negative ions for 30 minutes, the oxygen uptake capacity of the lungs can increase by 20%, and carbon dioxide can be removed by 15%, which can relieve the pain of asthma; (6) Reduce the resistance to cold and flu Allergies, improve allergic constitution and "hay fever"; (7) inhibit the growth of tumor cells; (8) absorb and shield electromagnetic radiation, etc.
2 Characteristics and preparation of negative ion coating
2.1 Features of Negative Ion Coatings
(1) Persistence: Negative ion coatings are made from natural minerals and refined by high-tech processing methods. Negative ions are generated through the magnetism between mineral molecules, and this intermolecular magnetism is long-lasting and effective.
(2) Effectiveness: It can continuously release high-concentration negative ions.
(3) Safety: It is composed of various natural inorganic minerals and is safe to use.
(4) Compatibility: No adverse effect on the performance of the original coating product.
(5) Radioactivity: far-infrared radioactivity reaches the national standard.
2.2 Preparation of negative ion coating
Negative ion powder is added in the preparation process of negative ion paint. Negative ion powder is mainly made of natural mineral tourmaline, which is prepared by ultra-fine pulverization, sol-gel coating modification, ion exchange doping and high temperature activation. In the preparation of negative ion paint, negative ion powder can be added in the pulping stage to fully mix the negative ion powder with other pigments and fillers. The negative ion paint prepared in this way has good stability and can ensure that the negative ion powder can fully play its role. The negative ion powder and wetting and dispersing agent can also be made into negative ion slurry first, and then added to the general finished paint at the later stage of paint making or directly added to the general finished paint. Paint with negative ion function. The process flow of negative ion paint preparation is shown in Figure 1.
Fig. 1 Process flow of negative ion paint preparation
Example of negative ion coating preparation:
Grind 2.5kg of rare earth ore, 2.5kg of tourmaline, and 5kg of feldspar in a wet ball mill for 240 hours, and pulverize into an emulsion with a particle size below 2 μm, and then add the obtained emulsion to 200kg of water-based acrylic emulsion. Then add the deep seawater concentrate obtained from the deep sea above 200m below the sea level and mix to prepare the water-based acrylic resin coating. Applying the obtained water-based acrylic paint on the surface of the inner wall of the toy will make the bad smell of the toy disappear; if it is applied to the surface of the inner wall of the office, it will reduce eye fatigue and tension; Production of Oxybenzylpenicillin Staphylococcus aureus; coating on the walls of warehouses, pallets, boxes, cold storage, washing machine dryers, household appliances, water towers, safe deposit boxes, etc., can make fresh food, fresh fish, crustaceans Foods, fermented foods, pharmaceuticals, cosmetics, pesticides, etc. maintain freshness and whiteness, so that they can be stored for a long time, thereby showing antistatic properties, masking magnetism, odor microorganisms, mold, electromagnetic waves, etc.
3 Epilogue
Negative ion coatings have broad application prospects. It not only has the basic properties of conventional coatings, but also has the functions of releasing negative ions, emitting far infrared rays, antibacterial and mildew proof, and purifying air. It has become the preferred product for architectural interior wall coatings. , theaters, large stadiums, and hospitals, basements and other special occasions are especially advantageous. Negative ion paint is not only suitable for the living room, but also the printing coating made of negative ion paint can be used on fabrics, just like carrying a negative ion generator with you, which can highlight the effect on human health.
