Nanomaterials will be promising in food packaging applications
The application of nanomaterials is not as mysterious as people think. With the help of external illumination, thermochemical treatment and other means, the packaging materials made of nanomaterials are modified to achieve higher barrier properties, longer preservation of food, and better quality of life. High tensile strength and hardness, higher plasticity and other functions, so as to achieve a wider range of applications. For example, ordinary plastic films can only carry a few kilograms of products at most, while nano-packaging films can carry hundreds of kilograms. However, the research in this field is still in the R&D stage and has not been truly industrialized. Nano-films have the special structure of nano-materials. At present, most of the research on nano-films focuses on nano-composite films, which are a class of nano-materials with broad application prospects. Composite structural films. The former mainly utilizes the specific functions of light, electricity and magnetism possessed by nanoparticles, and imparts functions that the matrix does not possess through compounding, while the latter mainly improves the mechanical properties through compounding of nanoparticles. Since changes in the composition, properties, process conditions and other parameters of the nanoparticles have a significant impact on the properties of the composite films, the properties of the nanocomposite films can be controlled artificially with more degrees of freedom. In the future, nano-weigherpackaging plastic film is considered to be the first breakthrough and the most promising application field in the packaging industry. Compared with ordinary film packaging, the environmental protection film made of nano-materials can preserve the freshness of fruits for up to 10 days. Packaging bags made of packaging film can keep fruits fresh for longer without spoilage. Qi Yuansheng, director of the Teaching Practice Center of Beijing Institute of Graphics, introduced in an interview with reporters that the current research on nanomaterials in the industry only belongs to the category of applied research, and the research directions of different institutions are different. Research and development, etc., even the research and development of nano-robots the size of rice grains. At present, the field that has made breakthroughs is the application of the high barrier properties of nanomaterials in the field of food packaging. According to the research of Japanese research and development institutions, the raw materials of 30-40 nanometers are dispersed into resin to make a film, which becomes a UV-absorbing material with strong absorption ability for light below 400 nanometers wavelength, which can be used as the best food sterilization bag and fresh-keeping bag. raw material. This is the most important application area of nanomaterials in the packaging industry. At present, many domestic R&D institutions and enterprises have begun to set foot in this field. As one of the research and development institutions of nano-packaging materials, Beijing Institute of Graphic Design has achieved staged research and development results. Compared with ordinary film packaging, which can keep fresh for up to 10 days, the packaging bag made of nano-packaging film can keep the fruit fresh for a longer time without deterioration. However, there are many different voices on the market. At present, consumers are more pursuing environmental protection and nature, and people are increasingly pursuing fresh food that can be eaten immediately. So, does a food package that lasts longer mean that the nutritional value of the food inside is lost too long? Will this ultra-long shelf life be widely accepted by the consumer market? The actual market application situation is not easy to predict. At the same time, although nano-packaging materials have broad prospects, the impact of nano-materials on computer automatic packing machine and expensive testing equipment will be a huge stumbling block when it expands market applications.
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