The biodegradable bag plays a role in improving people's living environment and improving people's quality of life, to a certain extent, it is conducive to promoting the sustainable development of the environment.
2 Biodegradation of natural polymer materials
2.1 PHA biodegradation analysis
PHA is also called a polyhydroxy fatty acid ester. It is an organic substance that is synthesized by various bacteria and can be used as energy storage. PHA has a complex structure, its plastics have good thermal processing properties, and also has very good biodegradability, making it a relatively good biodegradable material. It can often be used in the biomedical industry. The melting point of PHA is not fixed, and the decomposition reaction usually occurs at about 200 degrees Celsius. It has good tensile properties, but because of its high production cost, it hinders its wide application.
2.2 PHB biodegradation analysis
PHB has poor solubility in water, it is not bathed in water, but it can be dissolved in chloroform, and it has good biological compatibility properties. It can usually be made into biodegradable plastics that are easily degraded. It can be used in surgical instruments such as surgical sutures and surgical needles.
Many research teams have studied PHB, and the experimental results show that alum has been modified. Its PHB hydrophilicity can promote bodhisattva and has no adverse effect on the reproduction and biological function of human adrenal cells, so it can be used as a carrier material for adrenal cell transplantation surgery and has clinical applicability. The team of Li Rongqun found that the mixture of PHB and polyethylene oxide, which are completely decomposed, has good physical and mechanical properties. This mixture has high-quality tensile ductility and overcomes the characteristics that pure PHB is prone to brittle failure. It greatly extends the applicability of PHB.
2.3 grams of glycan biodegradation analysis
Chitosan (chitosan), also known as chitosan, is obtained by deacetylation of chitin (chitin), which is widespread in nature, and its chemical name is polyglucosamine (1-4) -2amino-BD glucose. It is an off-white solid substance with no odor and no toxicity. The biocompatibility of this substance is very good, with good biological blood compatibility and biological safety
Totality, in addition, its microbial degradation performance is also excellent and has been used by the medical industry, chemical industry, pollution treatment industry, and food processing industry.
3 Biodegradation of chemically synthesized polymer materials
Many artificial chemical synthetic polymer materials also have good biodegradability. For example PE material, PVC material, PLA material, PEG material, etc.
3.1 Biodegradation analysis of PE materials
PE material is currently the largest one-time use plastic material in China. It is widely used in product packaging, agricultural greenhouse film, and other industries. However, because of its strict limitations on the degradation mechanism, it is greatly affected by the effects of temperature, humidity, and geographical environment, which leads to its low degradability in the natural environment after it is discarded. Therefore, it is necessary to carry out certain transformation measures on the material properties of PE, which has an important impact on reducing its damage to the environment. The biodegradable bag supplier found that the use of oxidizing agents can cause a large number of molecules of PE materials to break and break, thereby increasing the rate of PE photolysis and pyrolysis reactions, greatly improving the waste of PE materials in the environment The degradation efficiency of the substance.