Discussion on the application of the hottest nano

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Discussion on the application of nanotechnology in ink continued

(2) characteristics of nano ink

nanotechnology is a new high-tech science and technology. Its research objects are mainly nano materials. Nano materials are current high-tech products. Now they have developed rapidly, began to penetrate into various fields, and successfully obtained many application materials with advanced and special properties, This is a new milestone in the history of material development. Because nano is a very small length unit, nano materials mean that the material itself is highly ultra-small and ultra-fine. Based on the various characteristics of 179 sets of rice materials imported from the extruder in October, applying it to the ink system will bring a huge boost to the ink industry. In 1994, the Massachusetts Xmx company of the United States has successfully obtained a patent for the raw material of nano uniform particles used in the manufacture of ink. Later, Xmx company plans to design a commercial production system, and use this patent to select appropriate volume of nano particle raw materials to obtain various pigments of ink, instead of relying on the chemical pigments required by the old tradition to produce ink. Because the absorption of light waves by nano metal particles is different from that of ordinary materials, nano metal particles can fully absorb light waves and make themselves appear black. At the same time, in addition to the full absorption of light, nano metal particles can also scatter light. Therefore, using these characteristics of nano metal particles, nano metal particles can be added to black ink to produce nano black ink, which can maximize this kind of packaging structure and also facilitate the heating of food in the microwave oven to improve the purity and density of black ink. In addition, semiconductor nanoparticles exhibit certain characteristics of light absorption due to the significant quantum size effect and surface effect

studies have shown that after chemical modification of the surface of nano semiconductor particles, the medium around the particles can strongly affect their optical properties, which is manifested by red shift or blue shift in the absorption spectrum. Experiments show that the light absorption edge of CdS nanoparticles has a significant blue shift, and the absorption edge of Ti02 nanoparticles has a large red shift. Accordingly, if they are added to yellow ink and cyan ink respectively to make nano ink, the purity of yellow ink and cyan ink can be greatly increased. Using nano ink with specific nano particles to copy and print color prints can enrich the levels of prints, make the tones more distinctive, and greatly enhance the ability to show image details, so as to obtain high-quality prints

nowadays, with the help of high and new technology, various components in ink (such as resin, pigment, filler, etc.) can be made into nano raw materials. In this way, because they are highly fine and have good flow and lubricity, they can achieve better dispersion, suspension and stability. With less pigment consumption, they have high covering power, good gloss, fine resin particle size, sharp film-forming edges, uniform and smooth, and thin film layer, which makes the printed image clear, If used in UV ink, it may lead to faster curing speed, and eliminate the shrinkage and wrinkling of the ink film due to the fine and uniform dispersion of the filler. In the printing ink of glass ceramics, if the inorganic raw materials are composed of nano fineness, it will save a lot of raw materials and print more refined, beautiful and high-quality images. It brings a great change to ink manufacturing in terms of pigments. It no longer depends on chemical pigments, but selects nanoparticles of appropriate volume to present different colors. Because some substances have different particle sizes and colors at the nanoscale, or different substances have different colors. For example, Ti02 and Si02 are white in nanoparticles, CR203 is green, and Fe203 is brown. In addition, inorganic nano materials such as nano A1203 have good fluidity, which can greatly improve the wear resistance of the ink film if added to the ink. Nano carbon ink has conductivity, which has a good mask effect on static electricity and prevents electrical signals from being interfered by external static electricity. If it is added to the ink, it can be made into conductive ink, such as high-capacity integrated circuits, modern contact panel switches, etc. In addition, if AG is made into nano scale instead of micron scale Ag in conductive ink, 50% of Ag powder can be saved. This conductive ink can be directly printed on ceramics and metals. The ink film is thin, uniform and smooth, and has good performance. If Cu and Ni materials are made into 0 Um ultrafine particles, which can replace palladium and silver and other precious metals to conduct electricity. Therefore, the combination of nanotechnology and anti-counterfeiting technology will open up another broad world of anti-counterfeiting ink

in addition, some nano particles have their own light-emitting groups and may emit light by themselves, such as "-n ≡ n-" nano particles. The printing products printed with the ink added with this kind of nano particles can be recognized by the human eye without the irradiation of external light sources, and can also achieve a good anti-counterfeiting line effect for anti-counterfeiting printing; For large-scale outdoor advertising spray painting or night reading graphic printing, there is no need for external light sources, which can not only save energy, but also greatly facilitate users

in addition, because nano particles have good surface wettability, they adsorb on the surface of pigment particles in the ink, which can greatly improve the lipophilicity and wettability of the ink, and ensure the stability of the whole ink dispersion system, so the printability of nano ink with nano particles has been greatly improved. It is believed that with the further development of nano material technology, more nano materials with different characteristics will be recognized and used by people. Applying these nano materials to ink manufacturing can obtain special inks with different uses, which can be used for confidential document printing, various anti-counterfeiting printing and various handicraft printing, and can obtain extraordinary good results

in electrostatic copying, using magnetic nano toner to replace the widely used non-magnetic toner can eliminate the need to add ferromagnetic particles to the non-magnetic toner as a carrier, and make a single group of photocopying developer, which can save raw materials and improve the copy quality

as for the source of nano materials, in fact, the process of product production and scientific research localization is accelerated and its cost is reduced. There are many ways to obtain nano materials, including high-temperature sintering (such as the sintering technology of carbon nanotubes, although many adult enthusiasts are also obsessed with LEGO wood), precipitation, high-temperature water dissolution, chemical vapor condensation or modern plasma energy polymerization. To sum up, the fineness and purity of ink are very sensitive to the quality of printed matter. To print high-quality products, we must have fine and high-purity ink as a guarantee. Therefore, it is of great significance for the printing field to correctly understand the relationship between ink fineness, purity and printing quality, strengthen a deeper understanding of nano ink, and develop a higher level of nano ink

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