While we are creating a new era of civilization, we also have adverse effects-white garbage and residual plastic films exist in the soil, which hinder the growth and development of crop roots and the absorption of water and nutrients, reduce the plastic film in the soil, and cause crops Production reduction; after eating discarded plastic film, it will cause intestinal obstruction and death; man-made fiber fishing nets and fishing lines lost or discarded in the ocean have caused considerable harm to marine life, so advocating green life and enhancing the environment Protection is urgent. Next we come to ease the classification of biodegradable materials.

Biodegradable materials can be broadly classified into two categories according to the biodegradation process. One is completely biodegradable materials, such as natural polymer cellulose, artificially synthesized polycaprolactone, etc., whose decomposition mainly comes from: ① due to the rapid growth of microorganisms, the physical collapse of plastic structures; ② due to the biochemical effects of microorganisms, Enzyme-catalyzed or acid-base catalyzed hydrolysis; ③Free radical chain decomposition caused by other factors. The other is a biodegradable material such as a mixture of starch and polyethylene. Its decomposition is mainly that the additives are destroyed, the polymer chain is weakened, the polymer molecular weight is decomposed to the degree of microbial digestion, and finally decomposed into carbon dioxide (CO2) and water.

Biodegradable materials are mostly produced by adding starch and photosensitizers and mixing them with polyethylene and polystyrene. Studies have shown that [2] starch-based biodegradable plastic bags end up in garbage dumps without exposure to sunlight. Even if there is biological double decomposition, the decomposition is mainly based on biological decomposition. According to the test for a certain period of time, the garbage bag has no obvious decomposition phenomenon, and the garbage bag has no natural damage, which plays a certain role in keeping the garbage in the bag fresh.

For solving environmental pollution, although starch-based plastics are more effective than disposable plastic products, since non-biodegradable polyethylene or polyester materials are still used as raw materials, except for the added starch that can be decomposed, the remaining large amount of polyethylene Or the polyester still remains and cannot be completely biodegraded. It just decomposes into pieces and cannot be recycled. After entering the soil, the situation is even worse, and the disposal of waste is chaotic. Completely biodegradable materials have become the focus of research on decomposed materials.

The above content is related to the classification of biodegradable materials. If you want to know more about biodegradable materials, you can contact online customer service, and we will serve you wholeheartedly.