A kind of biodegradable plastic and preparation method thereof

Abstract

The invention relates to a biodegradable plastic and a preparation method thereof, belonging to the technical field of plastic processing, wherein the parts by weight of each component are 16-21 parts of chitin, 2-5 parts of sodium fluorosilicate, 2-5 parts of gelatin, 1~3 parts of calcium carbonate, 1~3 parts of glycerin, 18~22 parts of superfine starch, 1~3 parts of glycerin, 0.4~0.7 parts of stearic acid, 0.4~0.7 parts of oleic acid, 15 parts of low density polyethylene ~20 parts, 15~20 parts of high-density polyethylene, 0.4~0.7 parts of manganese acetylacetonate, the preparation method is to raise the temperature of the container to 75~85°C, put the above raw materials in the container in proportion High to 125~130°C, keep stirring at this temperature and react for 1.5~1.8h, adjust the pH of the reaction solution to 5.8~6.5 with hydrochloric acid to obtain a uniformly dispersed solution; pour the solution into a preheated mold for foaming, The biodegradable plastic is obtained by thermal treatment and demoulding; compared with the same type of products on the market, the plastic has the advantages of lower production price, faster degradation speed, non-toxic, and no pollution to the environment.

Description

technical field [0001] The invention relates to a plastic, in particular to a biodegradable plastic and a preparation method thereof, belonging to the technical field of plastic processing. Background technique [0002] For more than half a century, with the rapid development of plastics industry technology, the world's total output of plastics has exceeded 1.7×108t. Its use has penetrated into various fields of industry, agriculture, and people's lives, and it has become a national economy alongside steel, wood, and cement. The four pillar materials. However, the extensive use of plastics also brings a large amount of solid waste, especially the widespread use of disposable plastic products such as food packaging bags, beverage bottles, agricultural films, etc., leaving a large amount of solid waste in public places and In the ocean, or left in the soil layer of cultivated land, it seriously pollutes the living environment of human beings and becomes a worldwide public haz...

AI Technical Summary

Problems solved by technology

The 21st century is an era of protecting the earth's environment, and an era of increasingly tense resources and energy. In order to manage those disposable items that are large in quantity, scattered, dirty, difficult to collect, or even forced to be collected for recycling, the economic benefits are poor or ineffective. Plastic waste not only pollutes the ecological environment, but is also a great waste of resources and energy

201210404923.4 discloses a degradable plastic and its preparation method. The plastic is composed of superfine starch, superfine plant powder, synthetic degradable resin, synthetic resin, plasticizer, pro-oxidant, compatibilizer, lubricant, photosensitizer , heat-sensitive agent, and degradation control agent, it has the characteristics of complete degradation and fast degradation speed, but due to the large proportion of ultra-fine starch and ultra-fine plant powder, the production cost is relatively high, and the stability of the finished product is poor

At the same time, the same type of biodegradable plastics has a higher price and lower biodegradable utility in the current market. Therefore, the present invention develops a biodegradable plastic with affordable cost and high degradation utility to improve existing products and technologies. question