Microcrystalline Packaging Materials--An Extension of Nanotechnology

The last century was the 100 years of rapid development of science, technology and culture. Various new things have emerged constantly, especially the emergence of new materials, especially the emergence and application of nanomaterials, which are about to change the world.

Nanometers are units of length. One nanometer is one billionth of a metre. For macroscopic matter, nanometer is a small unit. Because the grain size is much finer than that of conventional materials, atoms on its grain boundary are More than the number of atoms inside the crystal grain, this gives nanomaterials many exceptional properties. Compared with conventional materials, in addition to excellent mechanical properties, nanomaterials also exhibit better physicochemical properties, including optoelectronic, electromagnetic and thermal properties.

Nano packaging technology can be divided into three types of materials: three-dimensional, two-dimensional, one-dimensional and zero-dimensional nanomaterials. After more than 10 years of development, nanomaterials have made great progress. Nowadays, there are many types of nanomaterials, which can be divided into nano-metal materials, nano-ceramic materials, nano-semiconductor materials, nano-polymeric materials, and nano-composites according to their materials. They are more or less applied in the packaging field.

With the increase in demand for special functions of packaging in the 21st century, the emergence of such needs as explosion-proof packaging, anti-electromagnetic packaging, camouflage packaging, high-resistance packaging, and anti-radar packaging has promoted the development of nano-packaging technology. The nano-composite packaging material made of nano-materials has become a kind of high-tech material that we need. It not only greatly improves the performance of raw materials and gives it new functions, but also broadens the scope of application of raw materials and also saves Lack of resources.

At present nanomaterials have been widely used as a fine packaging material.

1. Nano-ceramic reinforcement and toughening

Advanced ceramic materials play an irreplaceable role in other harsh environments such as high temperature and strong corrosion. However, brittleness is a weakness that ceramic materials cannot overcome. Nano-ceramics have similar superplasticity to metals, which is a noteworthy focus in nanomaterials research. At present, the preparation of nano-ceramic powders is relatively mature, new technologies and new methods are emerging, and it has already reached a certain scale of production. The preparation methods of nano-ceramic powders mainly include gas phase method, liquid phase method, and high-energy ball milling method. The gas phase method includes an inert gas condensation method, a plasma method, a gas pyrolysis method, an electron beam evaporation method, and the like. The liquid-phase method includes a chemical precipitation method, an alkoxide solution method, a sol-gel method, a hydrothermal method, and the like.

2. Application in catalysis

The catalyst plays an important role in many fields of chemical engineering. It can control reaction time, increase reaction efficiency and reaction speed. Nanoparticles are used as catalysts in semiconductor photocatalysts, especially in the preparation of organic materials.

3. Application in paints

Due to the special surface and structure of nanomaterials, nanomaterials have excellent properties that are difficult to obtain in general materials and show a strong vitality. Surface coating technology is also a hot spot in the world today. Nanomaterials provide good opportunities for surface coatings, making it possible to functionalize materials. With the help of the traditional coating technology and the addition of nano-materials, nano-composite coating can be obtained, achieving a leap in function and modifying the traditional coating function. The nano-coating has a good application prospect and will bring a new technological revolution to the coating technology, and will also promote the research, development and application of composite materials.

4. Application in other fine chemicals

Fine chemical industry is a huge industrial field with a wide variety of products and a wide range of uses, and it affects all aspects of human life. The superiority of nanomaterials will undoubtedly bring a gospel to fine chemicals and show its unique charm. Nanomaterials can play an important role in the fields of fine chemicals such as rubber, plastics, and coatings.

Nanoscience is an emerging science that integrates basic and applied sciences, including nanoelectronics, nanomaterials, and nanobiology. The 21st century will be the era of nanotechnology. The application of nanomaterials involves various fields and has a wide range of application prospects. Nanomaterials will become a shining star in the field of materials science and will play a decisive role in new materials, energy, and information. With the continuous development of its preparation and modification technology, nanomaterials will be increasingly widely used in the packaging field.