Views:266 Author:Site Editor Publish Time: 2020-04-11 Origin:Site
Light storage and self-luminous pigment is a kind of pigment that can absorb visible light as energy and glow. It takes only a few minutes to light the pigment and it can continue to shine in the dark for more than 10 hours. This kind of pigment is a new type of environmental protection pigment, it does not consume electricity, does not produce harmful gases, has been widely used in the field of construction.
Fluorescent pigment is also a kind of pigment with luminous function, but its luminous principle is very different from light storage and self-luminous pigment. The fluorescent pigment can shine after being illuminated, but once the light source is removed, the fluorescent pigment can not shine. The fluorescent pigments can absorb a certain wavelength of light, and then immediately emit different wavelengths of light. The substances that can produce ray energy are added to the light storage and self-luminous pigment, and the brightness of the pigment can be changed by changing the additive. In addition, different light storage and self-luminous pigment can emit different colors of light, such as red, blue and green light.
In addition to the above two luminous pigments, there is also a pigment with luminous function, that is, reflective pigment. The reflective pigment itself can not shine, it can emit bright light when it is illuminated, but this light can only be seen from the direction of the light source, and it can not be seen from other directions. The reflective pigments made of different reflective materials can reflect different wavelengths of light. This pigment is mainly used on traffic signs to provide drivers with route and safety instructions.
The light storage and self-luminous pigment can be divided into organic pigments and inorganic pigments. The inorganic pigment has the advantages of strong absorption, high luminescence efficiency and stable physical and chemical properties. Rare earth elements are added to this pigment. Due to the rich energy levels and electronic transition properties of rare earth ions, rare earths become high quality self-luminous materials. Nowadays, the common inorganic self-luminous materials are made of sulfide (ZnS, CaS) and aluminate (SrAl2O4, CaAl2O4, BaAl2O4) and rare earth elements (Eu, Sm, Er, Nd).
In the field of self-luminous materials, organic materials have been paid more and more attention. Organic compounds have the characteristics of good adjustability, rich color, high color purity and flexible molecular design. According to different molecular structures, organic self-luminous materials can be divided into small molecular organic self-luminous materials, polymer organic self-luminous materials, organic complex self-luminous materials. The small molecular organic self-luminous materials may suddenly stop emitting light in solid state, so people have invented polymer organic self-luminous materials. These self-luminous materials have their own characteristics in the principle of luminescence, physical properties, chemical properties, and application. These organic self-luminous materials have been widely used in optical electronic devices, DNA diagnostics, photochemical sensors, dyes, fluorescent brighteners, fluorescent coatings, organic electroluminescent device (OELD), etc.