Nanotechnology Application in Paper (1)

Nanotechnology is a high-tech science that was born in the late 1980s and has rapidly emerged. Its basic meaning is to recognize and transform nature within the nanometer size (0.1-100nm), and to directly manipulate and arrange the laws and characteristics of atomic and molecular movements. Technological methods for creating new substances. In the field of printing, the application of nano-materials is mainly based on nano-powder, and its application range includes nano-ink coating, nano-paper, nano-aniline roller, and nano-parts. The characteristics and applications of nanopaper developed and applied in printing and packaging are described below.

First, the role of nano powder in paper manufacturing
In the field of printing, as with ink coatings, the application of nanopowder materials on paper has also shown good results. We know that paper is the most commonly used material in printing and packaging, and its quality is the best embodiment of print quality. As the fiber used for traditional paper such as trees, bamboo, and hemp is thick, the particles of coatings (such as calcium carbonate, etc.), fillers (such as kaolin, etc.) are relatively large, and there are some properties such as poor performance of gum and other ingredients. Reasons, make traditional papers have some defects, such as ordinary paper has shortcomings such as fear of water, fear of moisture, offset printing paper and electrostatic copy paper, although waterproof, moisture and other functions, but writing is not convenient, there are some special features can not be Implementation, etc., thus affecting the quality of printed matter. In recent years, with the rapid development of nanomaterials, the application of nanotechnology in the paper industry has become more and more widespread, and new results have emerged. What is involved in pulp and papermaking is nanochemistry and nanomaterials, which may lead to a new leap forward in the development of the paper industry and will increase the quality of prints again.

According to the current technical level and practical application of paper, wood fiber can only be processed to the micron (100-1000nm) level, because the wood cell diameter is relatively coarse, through the wood nanotechnology can change the cell structure of the wood and control cell growth , it may change the characteristics of wood. For most woods, when the fiber is micronized, the cells of the wood cells have been completely broken and the viscous liquid inside the cells can easily flow out. After mechanical pulping, it is no longer necessary to chemically extract harmful liquids and fibers from the cells. If the wood is processed to the nanometer level, the original cell structure of the wood will be destroyed, and the fibrous tissue structure will change. Cellulose and semi-fibers The lignin and lignin can be separated mechanically during processing, which can greatly increase the pulping rate and reduce the environmental pollution of the pulp and paper industry.

In addition, in the rapid development of science and technology, people will have higher requirements for paper performance, quality, etc. In addition to conventional printing and writing paper, the demand for papers with special functions is also increasing. Nano-materials, as a special additive for the manufacture of special papers, are attracting more and more attention. At present, in the papermaking industry, nanomaterials are mainly used for the development of functional papers such as water-repellent, antibacterial, antistatic, anti-aging and aromatizing, flame-retardant, and discoloration, and some products have been made available. The application of nano-composite materials in the field of packaging and printing will completely change the face of packaging and printing, opening up a new path for packaging and printing.

Although nanomaterials and nanocomposites have good performance and wide applications in the papermaking field, the research and development of nanomaterials are not yet mature and complete. There are still some problems that need further research and resolution, such as crushing, agglomeration and dispersion. The technology is still not ideal enough to be further improved. For the performance testing of nano products, the product standards still need to be further improved. However, it can be predicted that with the reduction of nanoparticle production costs and the increase of functional nanoparticle varieties, nanotechnology will play a greater role in the printing industry and the paper industry, bringing infinite vitality and vitality to printing and related industries.