Nano calcium carbonate possesses many excellent properties, especially after modification, and its application range is very wide. It has become the nano-material with the largest production and usage volume at present.

In-depth understanding! Diversified applications of nano calcium carbonate

　　 Diversified applications of nano calcium carbonate

　　Nano calcium carbonate has many excellent properties, especially after modification, its application range is very wide, and it has become the nano material with the largest production and usage at present.

 

 

　 　Application of nano calcium carbonate in plastics

　　Compared with ordinary calcium carbonate, modified nano calcium carbonate, in addition to being used as a filler, can also play the role of an activator and reinforcing agent, which can increase the volume of plastic products, improve the hardness and strength of products, improve the processing performance of plastics, and enhance the heat resistance, bending strength, elastic modulus and other performance indicators of plastic products.

　　Nano calcium carbonate has been widely used in the processing of various plastics such as PVC, PS, and PP, among which the usage of PVC is the largest, especially in products such as wires and cables and pipes.

　　

 

　　Application of nano calcium carbonate in rubber

　　In the rubber industry, nano calcium carbonate is mainly used in tires, wires and cables, and rubber products, and can play a role in increasing volume, reducing costs, and improving rubber processing performance.

　　Tires: Nano calcium carbonate can partially replace carbon black and white carbon black in the production of automobile tires, but there is still a gap in the reinforcing effect, so it is mainly used in parts with less stress, such as tire sidewalls, carcass glue, airtight layer glue, inner layer glue, and buffer glue. In production, the combination of nano calcium carbonate and active zinc oxide can significantly improve the strength of tire tread glue.

　　Hoses and belts: Nano calcium carbonate is mainly used in hoses and belts to reinforce and whiten, while improving the dispersibility of the rubber compound.

　　Wires and cables: Nano calcium carbonate is generally used in the protective sheaths and rubber materials of mining wires and cables, high-voltage wires and cables, and marine wires and cables.

 

 

　 　Application of nano calcium carbonate in adhesives

　　Nano calcium carbonate has advantages such as narrow particle size distribution, controllable particle size and morphology, and good stability, and is widely used in sealants and adhesives. It has advantages such as low cost, good reinforcing properties, and thixotropy. The most commonly used nano calcium carbonate is in silicone sealant, MS sealant, and polyurethane sealant.

 

 

　　 Application of nano calcium carbonate in coatings

　　Compared with heavy calcium or ordinary light calcium, nano calcium carbonate in coatings not only has a better reinforcing effect, but also can improve the hiding power, gloss, transparency, fast drying, and stability of the coating.

　　When nano calcium carbonate is added to organic or water-based coatings, the resulting coating not only has the characteristics of fineness, uniformity, fast drying, and high whiteness, but also can replace expensive titanium dioxide and relatively expensive colloidal calcium, reduce the amount of base binder used, make the denser lithopone in the formula suspended, prevent sedimentation, and improve the scrub resistance and stability of the coating through steric hindrance, especially suitable for the production of high-end automotive topcoats and chassis polyvinyl acetate paints, etc.

 

 

　 　Application of nano calcium carbonate in inks

　　Ink is mainly composed of pigments, binders, fillers, and additives. Modified nano calcium carbonate has good compatibility with binders and has advantages such as high gloss, strong stability, strong adaptability, no effect on ink factors, and excellent drying performance, which can comprehensively improve the quality of ink and reduce production costs.

　　

 

　　 Application of nano calcium carbonate in papermaking

　　As a papermaking filler, nano calcium carbonate has small and uniform particle size, small equipment wear, makes paper products delicate and uniform, and at the same time, the small particle size, high oil absorption value and specific surface area are conducive to pigment firmness; good whiteness, high brightness, good light shielding, can improve the whiteness and light shielding of paper; can save pulp usage, reduce costs, and is conducive to environmental protection.

　　In cigarette paper, the addition amount of nano calcium carbonate is about 45%～50%.

　　In high-grade sanitary paper, especially in women's products and baby products such as sanitary napkins, diapers, and baby diapers, the amount of nano calcium carbonate used is very large, mainly used to produce polyethylene films with good air permeability and water impermeability. In addition, due to the small particle size of nano calcium carbonate, the products produced are delicate, do not hurt the skin, and will not cause sensory discomfort to the human body.

　　In paper coating, nano calcium carbonate, due to its high whiteness, large specific surface area, high activity, and good reinforcing properties, can improve the gloss, whiteness, smoothness, surface strength, and ink absorbency of coated paper.

　　Application of nano calcium carbonate in lubricating oil

　　When nano calcium carbonate is added to lubricating oil, a monomolecular protective film can be formed between nano calcium carbonate and the metal surface through electrostatic adsorption, improving the anti-wear and friction reduction characteristics of lubricating oil. In addition, traditional lubricating oil additives generally contain S, P, Cl and other elements harmful to the environment, while nano calcium carbonate is environmentally friendly due to its biodegradability.

　 　Application of nano calcium carbonate in lithium batteries

　　Ju et al. prepared an anion anchoring coating by adding nano calcium carbonate, which significantly improved the anode stability. The nano calcium carbonate coating can adsorb local TFSI- anions, reduce the anion concentration, and thus promote the rapid diffusion of lithium ions, ultimately effectively inhibiting the growth of lithium dendrites. Studies have shown that the anode with nano calcium carbonate coating can still maintain a high coulombic efficiency of 98.4% after more than 420 charge-discharge cycles, and even reach a coulombic efficiency of 99.1% under an ultra-high battery capacity of 20 mAh/cm2.

　 　Application of nano calcium carbonate in biomedicine

　　Nano calcium carbonate, while having the characteristics of polymorphism, surface effect, and small size effect, also has good biocompatibility and biodegradability, making it have great application potential in drug delivery, tissue repair, and biosensing.

　　In targeted drugs, nano-calcium carbonate exhibits stronger penetration and higher drug loading capacity, prolonging blood circulation time and enhancing the efficiency and stability of targeted therapy; Abdulrahman et al. modified the antibacterial activity of caries-related pathogens by adding nano-calcium carbonate to restorative polymers, not only extending the lifespan of the restorative polymers but also playing a preventive role in caries and related diseases; due to the quantum dot effect, nano-calcium carbonate has a rapid response characteristic with almost no interference, making it an ideal imaging agent and biomarker.

　　 Applications of Nano-Calcium Carbonate in Building Materials

　　In the field of building materials, doping and modifying electrofused barium zirconate with calcium sources (calcium hydroxide, calcium oxide, and nano-calcium carbonate) significantly improves erosion resistance. Ultrafine nano-calcium carbonate powder prepared from alkali slag can be used to prepare cement mortar. SHCA et al. filled high-strength fiber-reinforced concrete with nano-calcium carbonate, which effectively improves the rheological properties and stability of the material.

　　 Applications of Nano-Calcium Carbonate in the Food Industry

　　It is reported that nano-calcium carbonate with a specific surface area of 30 m²/g, when applied to milk beverages, can increase the calcium content and inhibit precipitation; nano-calcium carbonate used in seafood sauce can impart texture, increase the strength of the sauce, resulting in a soft texture, and extend the shelf life.

　　 Applications of Nano-Calcium Carbonate in the Ceramics Industry

　　Developing uniformly distributed cubic calcium carbonate can be used to manufacture densified ceramics at a low temperature of 600℃.

　 　Applications of Nano-Calcium Carbonate in the Daily Chemical Industry

　　Due to its fine particles and high purity, nano-calcium carbonate can be used as a filler in cosmetics, toothpaste, and other daily necessities.

　　In summary, nano-calcium carbonate has a wide range of applications, involving the rubber industry, plastics industry, coatings industry, paper industry, pharmaceutical industry, etc., and new application fields are constantly expanding and extending. In recent years, affected by the policy regulation of the real estate industry, the demand for silica gel calcium and other products has shrunk, but other downstream industries have developed well, and the output has generally shown an upward trend.

　　On the other hand, the particle size and morphology of nano-calcium carbonate directly determine its performance and application fields. The morphologies of nano-calcium carbonate that have been developed include spindle-shaped, cubic, spherical, chain-like, needle-like, and flake-like. Cubic nano-calcium carbonate with good dispersibility can be used as a reinforcing agent for plastic and rubber products; chain-like and needle-like calcium carbonate have excellent reinforcing effects; spherical calcium carbonate has good dispersibility and wear resistance; and flake-like calcium carbonate is used in papermaking and coatings, providing good covering power.

　　Different industries have different requirements for nano-calcium carbonate. In addition to particle size and morphology, different requirements are put forward for the oil absorption value, dispersibility, moisture content, and pH value of the product. Enterprises need to continuously strengthen research and development, conduct in-depth research on the high-performance application of nano-calcium carbonate, optimize formula adjustment, and improve the adaptability of nano-calcium carbonate.

　　Furthermore, in the field of nano-calcium carbonate, due to the relatively early start of research and development and production, foreign companies rely on strong R&D capabilities, stable and reliable product quality, sophisticated instruments, and good brand reputation, occupying most of the high-end domestic market, with prices generally 1 to 3 times higher than similar domestic products.

　　The technical level of China's nano-calcium carbonate industry still has great room for improvement. Currently, domestically produced nano-calcium carbonate is mainly used in traditional fields such as rubber and plastics, sealants, inks, and coatings. It is necessary to increase R&D investment and actively expand the application research and development of nano-calcium carbonate in food, ceramics, engineering plastics, lightweight fillers, and life sciences to enhance competitiveness and seize market share in the mid-to-high-end product market.