In recent years, with the rapid development of the economy, people's pursuit of material and spiritual needs has become increasingly high, and there are correspondingly higher requirements for the outer packaging of products.
When purchasing products, people not only consider the beauty of the outer packaging, but also various other functions. It is precisely because people's pursuit of product packaging is constantly increasing that many new packaging materials are being applied to product packaging bags. Traditional plastic bags are a source of white pollution, seriously endangering the environment, causing groundwater and surface pollution, endangering human survival and health, and causing significant negative impacts on the environment that humans rely on for survival. In addition, the raw material for producing synthetic polymer materials, petroleum, will always be exhausted one day. Therefore, it is urgent to find new environmentally friendly materials and develop non petroleum based polymers. Biodegradable plastic bags are an effective way to solve this problem.
Biodegradable plastic bags, also known as "plastic bags made of green ecological materials," can degrade under the action of soil microorganisms and enzymes. Specifically, it refers to plastic bags made of polymer materials that can be biodegraded under certain conditions by natural microorganisms such as bacteria, toxic bacteria, and algae. Ideal biodegradable plastic bags made of biodegradable materials have excellent performance, can be completely decomposed by environmental microorganisms after disposal, and ultimately converted into CO2 and H2O, becoming a carbon cycle in nature. The decomposition of biodegradable plastic bags is mainly through the action of microorganisms. Therefore, the degradation mechanism of biodegradable materials is the process of material being digested and absorbed by bacteria, bacteria, etc. Firstly, microorganisms secrete hydrolytic enzymes outside the body to bind with the surface of materials, and through hydrolysis, cut off the high molecular chains on the surface to generate small molecular weight compounds. The degraded products are then ingested by microorganisms and undergo various metabolic pathways to synthesize microbial biomass or convert it into energy for microbial activities, ultimately converting it into CO2 and H2O. According to the chemical nature of their degradation, they can be divided into hydrolysis and enzymatic hydrolysis.
