Polyvinyl-based micro/nano ZnO composite material and preparation technology thereof

Abstract

The invention discloses a polyvinyl-based micro / nano ZnO composite material and a preparation technology thereof. The polyvinyl-based micro / nano ZnO composite material adopts LDPE (low-density polyethylene) as a base material and nano zinc oxide and micro zinc oxide as additives and is prepared with a two-step melt blending method. The specific preparation method comprises steps as follows: (1) LDPE and micro ZnO particles with surfaces modified with a silane coupling agent are subjected to melt blending, and micro ZnO / LDPE master batch is prepared; (2) LDPE and nano ZnO particles with surfaces modified with the silane coupling agent are subjected to melt blending, and nano ZnO / LDPE master batch is prepared; (3) the two types of master batch and pure LDPE are subjected to melt blending, and the micro / nano ZnO / LDPE composite material is prepared. The ZnO particles are used as a heterogenous nucleation agent, so that the crystalline size of LDPE becomes small, the crystalline structure is more compact, and the crystalline rate, the melting temperature and the crystallinity of LDPE are increased.

Description

technical field [0001] The invention relates to a composite material and a preparation process thereof, in particular to a polyethylene-based micro / nano ZnO composite material and a preparation process thereof. Background technique [0002] Energy is the blood of economic and social development, and electric energy is one of the most important links in social development. Since the reform and opening up, China's economy has maintained a rapid development, with an average annual growth rate of GDP of 9.8%, so new requirements have been put forward for the construction of the power system. In recent years, the pace of power construction in my country has been accelerating, generally meeting the needs of economic and social development, but still facing some contradictions and problems that need to be solved. [0003] Polymers are widely used as insulating materials for cables, and their insulating properties largely determine the quality and service life of power equipment. ...

AI Technical Summary

Problems solved by technology

Many researchers have added nanomaterials to polymers, and the prepared composite materials can effectively improve the performance of insulating materials. However, due to the small size of nanoparticles, large specific surface area, and high surface activity, it is difficult to process them during preparation, storage, and use. It is very easy to agglomerate and lose its superior performance; while the size of micron particles is relatively large, the specific surface area is small, and it does not have the characteristics of nanoparticles

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