Calcium carbonate whisker is a synthetic single crystal material, not only the raw material is cheap, but also widely distributed. Calcium carbonate whiskers are superior to general materials in terms of whiteness, heat resistance, wear resistance, etc., so they have good application prospects in many fields.
Calcium carbonate whisker is a synthetic single crystal material, not only the raw material is cheap, but also widely distributed. Calcium carbonate whiskers are superior to general materials in terms of whiteness, heat resistance, wear resistance, etc., so they have good application prospects in many fields.
Whiskers refer to whisker-like microcrystals that grow as single crystals in the shape of short fibers, but are much smaller in size than short fibers. Whisker is a new type of composite material reinforcing and toughening agent with excellent mechanical properties, which has the characteristics of large aspect ratio.
Calcium carbonate whiskers have the same composition as conventional granular calcium carbonate and can be applied to all fields of use of general calcium carbonate. In addition, calcium carbonate whiskers also have many advantages, such as high strength of inorganic whiskers, high elastic modulus, and can also play their toughening and reinforcing effects more effectively. At present, calcium carbonate whiskers are mainly used in reinforced plastics, friction materials, papermaking and other fields.
1 Application of calcium carbonate whiskers in plastics
The diameter of calcium carbonate whiskers is small, which has a microscopic enhancement effect on plastics. The surface finish of plastic products reinforced with them is high, and the calcium carbonate whiskers can be used for forming precision plastic products. High strength, high modulus, heat resistance and insulation. It has excellent properties such as good heat resistance and is a green material with high quality and low price. The rigidity, dimensional stability and thermal stability of inorganic whiskers can be combined with the toughness of polymer materials to prepare high-performance polymer composite materials.
When calcium carbonate whiskers are filled into nylon materials instead of glass fibers, the resulting products have better surface smoothness, and this composite material can be used in the manufacture of precision plastic products.
In addition to being used as a filler material in industrial manufacturing to change material properties to suit production, calcium carbonate whiskers also play an invaluable role in degradable plastics in the field of environmental protection. The use of calcium carbonate whiskers as a reinforcing material for degradable plastics will not cause secondary pollution to the natural environment, and can effectively reduce white pollution and protect the environment.
2 Application of calcium carbonate whiskers in coatings
In the coatings industry, calcium carbonate whiskers are widely used in water-based coatings. In water-based coatings, calcium carbonate whiskers can act as a skeleton in coatings due to their good morphology and good dispersion, giving full play to the excellent mechanical properties of calcium carbonate whiskers. The gloss of the coating filled with calcium carbonate whiskers is improved, the dispersibility is improved, and the settling property is reduced. When calcium carbonate whiskers are used in the coating, the viscosity of the coating is significantly improved, and the thixotropy, bonding strength and storage stability are also significantly improved. In addition, due to the characteristics of calcium carbonate whiskers, it can be uniformly distributed in the silica sol and emulsion solutions, thereby reducing the discontinuity of the coating, and the effect is very obvious.
3 Papermaking
In the paper industry, the use of granular calcium carbonate as a filling material has greatly improved the performance and printing speed of paper, and paper using calcium carbonate whiskers as a filling material has better printing adaptability on the basis of the former. , while calcium carbonate whiskers can be used as additives to produce high whiteness and better flatness paper. Due to its special morphology and properties, calcium carbonate whiskers make paper with better printability, higher strength and better retention than paper made with calcite. Therefore, due to this advantage, calcium carbonate whiskers have good development prospects in the paper industry, especially for some paper production with different uses and different needs, calcium carbonate whiskers are indispensable.
4 Application of calcium carbonate whiskers in friction materials
Calcium carbonate whiskers have been tested and applied for a long time as a filler for friction materials. Calcium carbonate whiskers have good high temperature resistance, have a significant effect of enhancing the wear resistance of friction materials, and have low raw material costs, which meet the needs of acting as fillers for friction materials. Therefore, calcium carbonate whiskers are expected to replace asbestos in the field of friction materials.
5 Application of calcium carbonate whiskers in medical materials
In addition to being used in industrial manufacturing, calcium carbonate whiskers are also widely used in medical materials. Calcium is an indispensable element in the human body. It usually exists in the human body in the form of calcium phosphate and is the main component of bones. One can prepare artificial bone composites by filling calcium carbonate whiskers and improve the mechanical properties of the materials.
In addition, calcium carbonate whiskers are also considered to be a green, non-toxic biomedical stimulant; calcium carbonate whiskers are used in the medical field