Nanometer zinc oxide is a kind of versatility of new inorganic material, the particle size of about 1 ~ 100 nm. Due to the grain fine, the surface electronic structure and crystal structure changes, the macroscopic object does not have the surface effect, volume effect, quantum size effect and macroscopic tunnel effect, and high transparency, high dispersion, etc. In recent years, found it in the aspects such as catalysis, optics, magnetics, mechanics, show many special features that make it in ceramic industry, chemical industry, electronics, optics, biology, medicine and many other fields have important application value, cannot compare with ordinary zinc oxide particularity and USES. Nano zinc oxide in textile, dope, etc can be used for uv shielding materials, antibacterial agent, fluorescent material, photocatalytic materials. Due to nano zinc oxide series of excellent and very attractive application prospect, so r&d nanometer zinc oxide has become the focus of many science and technology personnel.
Metal oxides such as zinc oxide, titanium dioxide, silica powder, 3 oxidation 2 aluminium and magnesium oxide, the powder made from the nanoscale, due to the size of particles and waves are equal or more hours, due to size effect increase the interval of the conduction band and valence band, so the light absorption significantly enhanced. All kinds of powder on the cover of the light and reflection efficiency have different differences. With zinc oxide and titanium dioxide comparison, wavelength less than 350 nanometers (UVB), both shielding efficiency, but in the 350 ~ 350 nm (UVA), the shield efficiency of zinc oxide was obviously higher than that of titanium dioxide. At the same time, the refractive index of a zinc oxide (n = 1.9) less than titanium dioxide (n = 2.6), the light of the diffuse reflection rate is low, make the fiber high transparency and good for textile dyeing and finishing.
Nanometer zinc oxide is used to produce far infrared reflection of the fiber material, commonly known as far-infrared ceramic powder. And the far infrared reflection function fiber is emit heat by absorbing the human body, and to a certain wavelength range of radiation far infrared ray of human body, in addition to can make human body blood flow increased in the subcutaneous tissue, promote the blood circulation, can also be covered infrared, reduce heat loss, therefore fiber is relatively general heat insulation.