Degradable plastic bag beneficial to water purification

Abstract

The invention provides a degradable plastic bag beneficial to water purification. The plastic bag material comprises the following components in parts by weight: 30-40 parts of carboxyl modified polyvinyl alcohol, 20-30 parts of polyether sulfone, 20-25 parts of modified starch, 15-25 parts of polyimide, 8-12 parts of polyacrylamide, 10-15 parts of polyaluminium chloride and 7-10 parts of a nano cross-linked silicon-based porous polymer. The plastic bag prepared by the method disclosed by the invention has excellent mechanical properties such as tensile property, impact strength and the like,and has a relatively low smoke emission rate, so that even if the plastic bag is subjected to waste treatment by adopting a combustion method, the air quality cannot be influenced. Meanwhile, microorganisms in water can be promoted to be gathered on the surface of a plastic bag film, and the plastic bag can be degraded by the microorganisms in the water, so that the degradation rate of the plasticbag is further promoted, and double technical effects of simultaneously purifying the water body and promoting degradation of the plastic bag are achieved.

Description

technical field [0001] The application belongs to the field of plastics, in particular to a degradable plastic bag which is beneficial to water body purification. Background technique [0002] The raw materials of plastic bags are polymer compounds, which have a stable structure and are not easily degraded by natural microorganisms. It takes more than 200 years for non-degradable plastic bags to rot naturally. If the waste plastic bags are not recycled, the waste plastic bags discarded on land and in water bodies will be swallowed by animals and fish as food, causing the death of animals and fish or affecting their growth. At the same time, it will seriously pollute the environmental sanitation and increase the workload of sanitation workers. Because plastic bags are light and thin, they can fly with the wind and will be scattered everywhere, affecting the city's beauty and environmental protection image. It is time-consuming, laborious and dangerous to remove. If it is bur...

AI Technical Summary

Problems solved by technology

If waste plastic bags are not recycled, waste plastic bags discarded on land and in water will be swallowed by animals and fish as food, causing death or affecting the growth of animals and fish

At the same time, it will seriously pollute the environment and sanitation and increase the workload of sanitation workers. Because plastic bags are light and thin, they can fly with the wind and will be scattered everywhere, affecting the beauty of the city and the image of environmental protection. It is time-consuming, laborious and dangerous to remove.

If it is burned at will, it will emit toxic gas, pollute the air and affect people's health

[0003] When plastic bags are discarded in water, on the one hand, their high molecular properties are not easy to be degraded by microorganisms such as bacteria in the water; Gradual degradation will also cause secondary pollution to the water body. The degraded organic chemical poisons and trace organic poisons will gradually affect freshwater or marine animals such as fish and sea turtles, and then lead to the death of birds that eat these fish, or lead to The health of human beings who eat these fishes is affected, therefore, how plastic bags degrade in water is an unresolved problem in the prior art

[0004] Chinese patent 201810946083.1 discloses a degradable plastic bag with a graft copolymer composition, and shows that the plastic bag made by it has good mechanical properties, but it does not show that the plastic bag made by its composition and method can be used in Rapidly degrades in water and does not pollute water bodies

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