The hottest nano plastic is gaining momentum in th

2022-08-15
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Nano plastic is a global trend

when nano plastic is used to make beer bottles, the oxygen transmission rate is greatly lower than that of ordinary PET bottles, and when this plastic is used to make packaging film, it will have a good fresh-keeping effect on meat, canned food and other foods. This new packaging material began to blow a "whirlwind" to the global food packaging industry

the raw material of nano plastic is montmorillonite. Nanometer is a unit of length. One nanometer is one millionth of a millimeter (that is, one nanometre), which is one billionth of a meter. Nanostructures usually refer to micro structures with a size of less than 100 nanometers. The technology of studying and processing materials at this level is called nanotechnology. Nanotechnology is actually a kind of technology that uses atoms and molecules to make substances

Professor Qi Zongneng, the National Key Laboratory of engineering plastics of the Institute of chemistry of the Chinese Academy of Sciences, introduced to him how to solve the loading problem of the testing machine. The term "nano plastic" refers to the organic/inorganic nano composite material formed by inorganic filler dispersed in organic polymer with nano size. In nanocomposites, the size of the dispersed phase is less than 100mm at least in one-dimensional direction. With the support of the National Natural Science and technology foundation project, the state-owned high-tech new materials (863) key project, and the Sino German science and technology cooperation project of the Ministry of science and technology, after 8 years of research, our company can finally move from laboratory to production

the raw material of nano plastics is "montmorillonite", which is a kind of natural clay mineral with high yield in China and a kind of layered silicate. Scientifically speaking, nano plastics should be called "polymer/layered silicon salt nanocomposites" or "polymer/clay nanocomposites". It is generally called "nano plastic". Japan first used "montmorillonite" as raw material to produce nano nylon 6 in the shipbuilding market in the early 1990s. Due to its relatively innovative ideas, the plastic industry has had a lot of vibration. Today, the Miller Lite beer bottled by nano beer company of the United States has been on the market last year. Japan's nano film packaged food has also begun to enter China, and nano food packaging materials have begun to blow a "whirlwind" around the world

preparation process of intercalation composite technology. Professor Qi pointed out that nano plastic is not a new term created by our country, but it is actually called this name in some professional publications in the world. Some people say that adding clay carbon with calcium or other materials in the ordinary way turns into nano plastic, which is wrong. This is not called nano plastic, nor nanocomposites, but general filling materials. The reason is that even if nano calcium is added, it cannot be well distributed in it and cannot form a polymer in nano state

in addition,

the montmorillonite structural layer is nanoscale, which contains three sublayers. There is an aluminum oxide octahedral sublayer sandwiched between the two silicon oxygen tetrahedral sublayers. The sublayers are covalently connected by sharing oxygen atoms, and the bonding is extremely firm. The whole structure sheet is about 1nm thick and 100nm long and wide. Because some aluminum atoms in the aluminum oxide octahedral sublayer are replaced by low valence atoms, the sheet is negatively charged. The excess negative charge is balanced by cations such as na+, ca+, mg+ free in the interlayer, so it is easy to ionize with alkyl quaternary ammonium salt to other organic cations, and can provide basic support for the realization of manufacturing power in the middle of this century. The organic montmorillonite produced by the exchange reaction. The exchanged montmorillonite became lipophilic, and the distance between layers increased. It can be further mixed with units or polymer matrix to form nano plastic

film packaging of nano beer bottles in China should be industrialized. Professor Qi showed them the excellent nano plastic bottle. Instead of blowing the bottle according to the mold of the beer bottle, they used the look of a mineral water bottle. The experimental results showed that the gas barrier was greatly improved, but the transparency had not been solved. At present, it is the first generation of products. They want to make the second generation of products like ground glass, which is still a prototype of the laboratory. However, American peer nanocor company has solved the problem of transparency, and the response is good after the product is launched

in the United States, glass containers are not allowed to enter the stadium, horse field, casino and other public places, which gives space for plastic beer bottles. However, in China, due to different living habits and concepts, plastic beer bottles are still a wait-and-see attitude for many entrepreneurs. The price of the bottle, the improvement of the production line, the promotion of the market and other aspects require enterprises to re calculate whether this "innovation" is "cost-effective"

peers are not necessarily competitors. China is rich in montmorillonite resources, so nanocor company is ready to cooperate with us to jointly develop the Chinese beer bottle market. In response to the suggestion that some foreign companies have begun to use carbon coating to solve the problem of high oxygen transmission rate of beer bottles, Professor Qi said that if the products are formed and accepted by the market, it is estimated that the market price gap of these technologies is not large. Of course, they will be more expensive than glass bottles, which depends on the performance price ratio

this technology is used in film packaging, such as nano nylon. The transparency is well solved, and the shelf life of canned goods, meat and cheese products will be extended. The price of nano film is certainly cheaper than aluminum-plastic composite film, but the products made so far are not as good as three-layer aluminum-plastic film. Through the efforts of scientists, it is likely to develop one-layer nano film. And it may be faster than the development and promotion of Nemi beer bottles

the biggest problem is the shortage of R & D funds. For the industrialization of nano plastics, Professor Qi believes that the main reason is the shortage of R & D funds. After all, we are research institutes. In the early stage, we rely on national funds for research, and in the later stage, the promotion depends on the investment of entrepreneurs. Entrepreneurs' investment certainly has their consideration. They prefer to spend a lot of money on foreign mature products. If they continue to do research and development, they think the risk is great. Although it is cheap, they are unwilling to set up. This is a "strange circle" in China's scientific community. Although science can only achieve the stage of laboratory, if we go ahead, the money is gone, and foreign enterprises have a lot of capital operation funds to support research. Once they succeed, they begin to expand the global market

nano plastics are a large market in food packaging. China has taken a gratifying step, and the shortage of funds has become the biggest difficulty in industrialization. At present, the State Key Laboratory of engineering plastics, Institute of chemistry, Chinese Academy of Sciences has applied for 12 invention patents, published 8, and authorized 3 times. With the implementation of the transformation of the scientific research institute into an enterprise, Professor Qi said that in the near future, their products will enter people's lives

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