Nanotechnology is a new science and technology. The nanometer is a length unit, which is 9m to 10m. The research object of this technology is mainly nanomaterials. Nanomaterials have now begun to penetrate various fields. In 1994, the XMX Corporation of Massachusetts, USA, has successfully obtained a patent for the production of nano-sized uniform fine particle materials for inks. As the nano-metal particles can absorb all the light waves and make themselves appear black, they also scatter light. Therefore, by using these characteristics, nano-metal particles can be added to the black ink, and the nano ink can be manufactured to increase its purity and density. In addition, due to the existence of significant quantum size effects and surface effects, semiconducting nanoparticles exhibit a certain degree of absorption of light.
Studies have shown that after chemical modification of the surface of the nano-semiconductor particles, the surrounding medium of the particles can strongly affect the optical properties, showing a red-shift or blue-shift of the absorption spectrum. Experiments have shown that there is a clear blue shift in the light-absorbing edge of the Cds nanoparticles and a large red shift in the absorption edge of the TiO2 nanoparticles. Accordingly, if they are added to yellow and cyan inks to make nano inks, their purity can be improved. The use of nano-inks with specific nano-particles to reproduce printed color prints will result in a richer hierarchy, a clearer tone, and a greater ability to express the details of the image.
Nowadays, with the help of high technology, various components in inks (such as resins, pigments, fillers, etc.) can be made into nano-scale raw materials. In this way, due to its high degree of fineness and fine flow and lubricity, it can achieve better dispersion and suspension, stability, low pigment content, high hiding power, good gloss, fine resin particle size, continuous and uniform film formation, Thin film, print images more clearly. If used in UV inks, the curing speed can be accelerated, and shrinkage and wrinkling of the ink film can be eliminated due to the fine and uniform dispersion of the filler. In the glass-ceramic ink, if the inorganic material is made into nano-scale fineness, it will save a lot of raw materials and print more refined and more beautiful high-quality images. This brings a huge change to the ink manufacturing industry, so that instead of relying on chemical pigments, it chooses the appropriate volume of nanoparticles to present different colors. Because there are substances in the nanoscale, the particle size of the different colors are different, or different materials of different colors, such as TiO2, SiO2 in the nanoparticles are white, Cr2O3 is green, Fe2O3 is brown, and inorganic nanomaterials such as nano-Al2O3 have very Good fluidity, if added to the ink can greatly improve the wear resistance of the ink film. Nano-scale carbon ink is conductive, has a good shielding effect on static electricity, to prevent the signal from external static electricity interference, if it is added to the ink can be made into conductive ink, such as large-capacity integrated circuits, modern contact panel switches, etc. . In addition, in the conductive ink, such as the Ag made of nanometer instead of micron Ag, can save 50% of Ag powder, this conductive ink can be directly printed on the ceramic and metal, the ink film is thin and uniform smooth, very good performance it is good. If the Cu, Ni material is made of 0.1μm ~ 1μm ultrafine particles, it can replace palladium and silver and other precious metals conductive. Therefore, the combination of nanotechnology and anti-counterfeiting technology will open up another broad field of security ink.
In addition, some nano-particles themselves have luminescent groups that may emit light themselves, such as "-N≡N-" nanoparticles. Prints printed with inks containing this kind of particles can be recognized by human eyes without external light source irradiation, and can also be used for anti-counterfeit printing; they can be used for outdoor large-scale advertising printing or nighttime printing. Photographic prints that are read will no longer require external light sources, which will not only save energy, but also greatly facilitate users.
Because nanoparticles have good surface wetting properties, they are adsorbed on the surface of the pigment particles in the ink, which can greatly improve the ink's lipophilicity and wettability, and can ensure the stability of the entire ink dispersion system. Therefore, nanoparticles are added with nanoparticles. Nano ink printing performance is greatly improved. With the further development of nanomaterial technology, it is believed that more nanomaterials with different characteristics will be recognized and used by people.
In electrostatic copying, magnetic nanopowders are used instead of non-magnetic toners, which are widely used today, to eliminate the need to add ferromagnetic particles as a carrier in non-magnetic toners and to make a single-component copying developer. Raw materials and improve copy quality.
As for the source of nanomaterials. In fact, there are many ways to obtain nanomaterials, such as high-temperature sintering (such as sintering technology of carbon nanotubes), precipitation method, high-temperature dissolution method, chemical vapor condensation method, or modern plasma energy polymerization method.
With the continuous improvement of the printing quality requirements, higher requirements have been put forward for inks. With the rapid development of science and technology, various types of inks are constantly appearing in the fields of ordinary printing, special printing, and security printing. They not only require excellent quality of printed products, but also meet various special needs such as environmental protection and anti-counterfeiting. As a result, the emergence of such as magnetic ink, fluorescent ink, photo-induced changeable ink, temperature-varying ink, etc., has brought the development of the printing industry to a new height.
Studies have shown that after chemical modification of the surface of the nano-semiconductor particles, the surrounding medium of the particles can strongly affect the optical properties, showing a red-shift or blue-shift of the absorption spectrum. Experiments have shown that there is a clear blue shift in the light-absorbing edge of the Cds nanoparticles and a large red shift in the absorption edge of the TiO2 nanoparticles. Accordingly, if they are added to yellow and cyan inks to make nano inks, their purity can be improved. The use of nano-inks with specific nano-particles to reproduce printed color prints will result in a richer hierarchy, a clearer tone, and a greater ability to express the details of the image.
Nowadays, with the help of high technology, various components in inks (such as resins, pigments, fillers, etc.) can be made into nano-scale raw materials. In this way, due to its high degree of fineness and fine flow and lubricity, it can achieve better dispersion and suspension, stability, low pigment content, high hiding power, good gloss, fine resin particle size, continuous and uniform film formation, Thin film, print images more clearly. If used in UV inks, the curing speed can be accelerated, and shrinkage and wrinkling of the ink film can be eliminated due to the fine and uniform dispersion of the filler. In the glass-ceramic ink, if the inorganic material is made into nano-scale fineness, it will save a lot of raw materials and print more refined and more beautiful high-quality images. This brings a huge change to the ink manufacturing industry, so that instead of relying on chemical pigments, it chooses the appropriate volume of nanoparticles to present different colors. Because there are substances in the nanoscale, the particle size of the different colors are different, or different materials of different colors, such as TiO2, SiO2 in the nanoparticles are white, Cr2O3 is green, Fe2O3 is brown, and inorganic nanomaterials such as nano-Al2O3 have very Good fluidity, if added to the ink can greatly improve the wear resistance of the ink film. Nano-scale carbon ink is conductive, has a good shielding effect on static electricity, to prevent the signal from external static electricity interference, if it is added to the ink can be made into conductive ink, such as large-capacity integrated circuits, modern contact panel switches, etc. . In addition, in the conductive ink, such as the Ag made of nanometer instead of micron Ag, can save 50% of Ag powder, this conductive ink can be directly printed on the ceramic and metal, the ink film is thin and uniform smooth, very good performance it is good. If the Cu, Ni material is made of 0.1μm ~ 1μm ultrafine particles, it can replace palladium and silver and other precious metals conductive. Therefore, the combination of nanotechnology and anti-counterfeiting technology will open up another broad field of security ink.
In addition, some nano-particles themselves have luminescent groups that may emit light themselves, such as "-N≡N-" nanoparticles. Prints printed with inks containing this kind of particles can be recognized by human eyes without external light source irradiation, and can also be used for anti-counterfeit printing; they can be used for outdoor large-scale advertising printing or nighttime printing. Photographic prints that are read will no longer require external light sources, which will not only save energy, but also greatly facilitate users.
Because nanoparticles have good surface wetting properties, they are adsorbed on the surface of the pigment particles in the ink, which can greatly improve the ink's lipophilicity and wettability, and can ensure the stability of the entire ink dispersion system. Therefore, nanoparticles are added with nanoparticles. Nano ink printing performance is greatly improved. With the further development of nanomaterial technology, it is believed that more nanomaterials with different characteristics will be recognized and used by people.
In electrostatic copying, magnetic nanopowders are used instead of non-magnetic toners, which are widely used today, to eliminate the need to add ferromagnetic particles as a carrier in non-magnetic toners and to make a single-component copying developer. Raw materials and improve copy quality.
As for the source of nanomaterials. In fact, there are many ways to obtain nanomaterials, such as high-temperature sintering (such as sintering technology of carbon nanotubes), precipitation method, high-temperature dissolution method, chemical vapor condensation method, or modern plasma energy polymerization method.
With the continuous improvement of the printing quality requirements, higher requirements have been put forward for inks. With the rapid development of science and technology, various types of inks are constantly appearing in the fields of ordinary printing, special printing, and security printing. They not only require excellent quality of printed products, but also meet various special needs such as environmental protection and anti-counterfeiting. As a result, the emergence of such as magnetic ink, fluorescent ink, photo-induced changeable ink, temperature-varying ink, etc., has brought the development of the printing industry to a new height.
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