Organic photochromic materials are a new type of functional materials emerging in the world in recent years. They have not only been applied in high-tech fields, but also have emerged in the civil industry.

Organic photochromic materials are a new type of functional materials emerging in the world in recent years. They have not only been applied in high-tech fields, but also have emerged in the civil industry. Foreign countries have used a small amount of civilian products such as clothing and plastics, which has aroused the attention and attention of entrepreneurs from various countries. China's research in organic photochromic materials has reached the world's advanced level. After years of efforts, Nankai University has been able to produce organic photochromic coatings and dyes in small batches.

Paints made of photochromic materials can be used to produce a wide range of signs and designs for various daily necessities, clothing, toys, accessories, baby carriages, or applied to interior and exterior walls, road signs, and buildings. Rich, colorful patterns or patterns to beautify people's lives and the environment; can be made into transparent plastic film, affixed to or embedded in car glass or window glass, and the color of sunlight is immediately discolored, so that sunlight is not dazzling, protects eyesight and ensures safety, and Can play a role in regulating indoor and automotive temperature; can also be dissolved or mixed into the plastic film, used as agricultural greenhouse agricultural film, increase agricultural products, vegetables, fruits and other production. Another important use is for military covert materials, such as the clothing of military personnel and the cover of combat weapons.

The industries involved in photochromic materials are particularly large in the market. For example, one percent of the garment dyes use photochromic materials, so there are tens of millions of garment sales in the country, and the lowest is also around 100 million yuan; One-hundredth of plastic products use photochromic materials, so there are tens of millions of products in the country, and sales are at least 100 million yuan; plus paints, inks, safety glass films, and military concealment materials, etc. A huge new industry cluster can be formed.

Organic photochromic materials will rapidly change from colorless or light colors to various colors such as red, green, blue, and purple when they are exposed to sunlight or other light sources, and return to the original colorless state after stopping the illumination or heating. It is a reversible color change process. The purpose of international research is to be used for optical information storage, light control, optical switches, optical device materials, optical information genetic materials, and modified gene chip materials. In addition to the above goals, Chinese scientists and technicians have also successfully used it for anti-counterfeiting identification. Materials, among which Nankai University has industrialized scientific research achievements and mass produced products. New studies have shown that using photochromic properties, autoradiographic photographic film and holographic materials can be prepared, photochemical bistable state can be achieved by photochromic reaction, and can be used for high-performance computers of nanometer-sized recording elements.

The countries that currently study the most photochromic materials are the United States, Japan, and France. Japan has developed earlier in the civil industry. At present, only a small amount of photochromic materials are sold in Japan and the United States, and photochromic materials have been printed on T-shirts. Color-changing glasses made of organic photochromic materials have also been sold. However, the United States, Japan, and other developed countries use photochromic materials for the civilian industry is still in its infancy, and there is no large-scale production and marketing, domestic products have not yet seen the production of photochromic materials, only our country for security identification materials Anti-counterfeit identification marks appear in certain tobacco and alcohol products, so the development of photochromic materials, in the application of civilian products, diarrhea (17) hoop occupies obscure?

The raw material cost of photochromic materials is cheap and will not increase the raw material cost of photochromic clothing, fabrics, fibers, plastic products, paints, paints, inks and other products; this material is odorless and non-toxic and will not cause harm to human body. Does not cause pollution to the environment; it brings people a variety of color changes, regulate people's living environment and life.

The production and application of photochromic materials can promote the upgrading of a number of traditional industrial products, upgrade the technical level of traditional industries, and form a new industrial cluster. In view of the special properties of photochromic materials, it has a more practical and broader application prospect in high-tech fields, especially in the information industry. China's textile printing and dyeing and apparel industries are traditional industries that directly face the fierce competition in the international market. If we use photochromism to upgrade the products of these traditional industries, we will be able to stand up in the world and create more job opportunities. It is more conducive to China's economic development.