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Product preparation process of nano zinc oxide Product preparation process of nano zinc oxide
Nanometer zinc oxide has large specific surface area, large surface energy and is easy to agglomerate. On the other hand, the surface polarity of nano ZnO is strong, and it is difficult to form a uniform distribution in organic media, which greatly limits its nanotechnology effect. Therefore, the dispersion and surface modification of nano zinc oxide powder become an indispensable treatment method before nano materials are applied to the matrix.
Nanodispersion refers to the technology that, in a specific liquid medium (such as water), various principles, methods and means are used to reduce the aggregates of various social forms composed of dry nano material particle systems into primary particles and enable them to be stably and evenly distributed in the medium. The surface modification of nano powder is based on the extension and expansion of nano dispersion technology, that is, according to the needs of applications, Dispersed nanoparticles are coated with appropriate substances or dispersed in soluble solid carriers. After surface modification, they have a series of surface properties such as adsorption, wetting, dispersion, etc. Will change. Generally, nano dry powder can be automatically or easily dispersed in a specific medium, which is very convenient to use. Generally, there are three methods to modify nano particles: 1. Coat the surface of nano particles with a layer of other social substances evenly, so that the surface working properties of nano particles can develop and change; 2. Use charge transfer complexes (>coupling agents such as silane, titanate, stearic acid, organic silicon, etc.) as surface modifiers to conduct chemical adsorption or chemical reaction on the surface of nanoparticles; 3. The surface structure of nano material particles can be modified by corona discharge, ultraviolet radiation, plasma, radiation and other high-energy means.
According to the requirements of different application fields, select appropriate surface modifier or surface modification process to modify the surface of nano zinc oxide, improve its surface performance, and enhance the compatibility of nano zinc oxide with the matrix, so as to apply to various fields and improve product performance and technical indicators.
What is the preparation process of nano zinc oxide? Now let's have a brief understanding.
The preparation and research methods of zinc oxide can be divided into the following three categories: direct method (also called American method), indirect method (also called French method) and wet chemical method. At present, many zinc oxide products on the market are direct or indirect products, with the particle size of micrometer and small specific surface area, which greatly limits their application fields and their performance in products.
Nanometer zinc oxide was prepared by wet chemical method (NPP method). Various zinc containing raw materials can be used to leach zinc by acid leaching, and impurities in the raw materials can be purified for many times to obtain basic zinc carbonate by precipitation, and nano zinc oxide can be obtained by roasting.
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Luoyang Danke Zinc Industry Co., Ltd.
Add：Huayang Industrial Cluster, Mengjin County, Luoyang, Henan
Tel：+86-0379-67862286
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+86-15837919773
Email：lydkxy@163.com