At present, "nanoplastics" has become a "hot spot" for high-tech plastics. In the industry, many companies have had a keen interest in “nano†and even without a little “nano†concept, blindly brand their products with the name “nano†to improve the product's grade and popularity.
Nanomaterials is a completely new scientific field that has just emerged in recent years. It involves knowledge in many fields such as physics, chemistry, materials, and biology. This article only makes a common sense introduction to "nanoplastics".
To understand "nanoplastics" should first understand "nanotechnology", but to understand "nanotechnology" must understand "nano".
"Nano" is a measure of length, and its scale is 1 billionth of a meter (10-9m). In general, nanomaterials mean that at least one phase in a two-phase microstructure has a nanoscale dimension. Nanoparticles have very small particle size, large surface energy, and easy to agglomerate, so how to obtain nanoparticle itself is a very complicated technical problem. At present, nano-particles that can be produced and utilized are mostly inorganic nanoparticles, and nano-particles that can effectively modify plastics are SiO2, TiO2, CaCO3, MMT, and the like.
The core content of "nanotechnology" is how to solve the problem of reunion of nanoparticles. Because nanoparticle itself is easy to agglomerate, it is very difficult to get a single dispersed nanoparticle. How to make nanoparticle evenly dispersed into the matrix is ​​"nanotechnology" The key technology. At present, from the application research report of “nanotechnologyâ€, there are two methods to implement industrialization: 1. Nano-intercalation technology, that is, through the intercalation treatment of n-MMT, made with a certain degree of compaction, size The even masterbatch, after mixing and blending and granulating the masterbatch, solves the problem of uneven dispersion of the nanomaterial in the matrix, and forms a nanocomposite material. 2. Using the vibration mill dispersion method, the nanoparticles can be uniformly dispersed in the matrix, basically no agglomeration is generated, and the nano-scale dispersion is truly achieved.
"Nano-plastics" refers to the fact that the matrix is ​​a high-molecular polymer, and the full dispersion of the nanoparticles in the plastic resin effectively improves the heat resistance, weather resistance, and wear resistance of the plastic. "Nanoplastics" can make ordinary plastics have the same rigidity and heat resistance as ceramic materials, while retaining the toughness, impact resistance and easy processing of plastics. At present, nano-particles are used in nano-particle-modified NPE, NPET and NPA6 (Nano-polyethylene, nano-PET polyester, and nano-Nylon 6), and silver (Ag+) is designed into micropores on the surface of particles. It can be made into nano-silver antibacterial material by being stable and stable. Adding this material to the plastic can make the plastic have antibacterial, anti-mildew, self-cleaning and other excellent properties, making it a green environmental protection product. At present, it has been applied in ABS, SPVC, HIPS, PP plastics.
"Nano-plastics" is a new high-tech material and has very good prospects for development. Due to the lack of understanding of this new material in China, there is no complete quality assurance system and strict production management, and it is in a kind of "a However, the situation in the “above†situation is very difficult to defend, so that “nano-plastics†is in danger of “premature†at the outset. Therefore, the author eagerly hopes that relevant national authorities can protect this new material through appropriate standards and regulations and promote It's healthy growth.
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