Plastic will not "rot" on its own, developed countries on the use of plastic has been used in landfills, incineration and recycling and other methods of treatment, but there are such and such shortcomings. For this reason, from the 1970s, many scientists in China and abroad to solve the problem of "white pollution", have devoted themselves to the development of "green plastics" - degradable plastics.
The so-called "green plastic" does not mean green-colored plastic, but refers to the ability to self-degradation and reuse, will not pollute the environment of the plastic. Specifically, it refers to a class of polymers that have the same efficacy as ordinary plastic products within a certain period of use, and can rapidly degrade on their own and assimilate with the natural environment after completing a certain period of efficacy. Because it is of great significance to the protection of the environment, it is called "green plastic".
There are many varieties of green plastics, but here we will only introduce four types: photodegradable plastics, natural polymer plastics and microbial polymer plastics.
Photodegradable plastics are plastics produced by adding a small amount of photosensitizer to the polymer. Under the light, it can be decomposed into fragments, and even if it exists in the soil for a long time later and is no longer decomposed, it will not affect the physical and chemical properties of the soil, and will not cause damage to soil nutrients.
Natural polymer-type plastics are plastics made chemically using natural substances such as cellulose and lignin. These plastics have excellent transparency and extensibility, and can be decomposed into carbon dioxide and water by microorganisms after being buried in the soil for only a few days, without polluting the environment.
Microbial polymer plastic, is by a kind of bacteria called eukaryotic alkaline bacteria first in glucose solution to produce biochemical polyester, and then by further processing of bioplastics produced. This plastic in the role of bacteria can also be decomposed into water and carbon dioxide, not only does not pollute the environment, but also can be used as fertilizer, back to nature.
