A Brief Introduction To The Four Categories Of Biodegradable Materials

At present, it is mainly divided into four categories: polylactic acid (PLA), polylactate (Phat) and polylactate (PBAT).

Polylactic acid: It is one of the most common degradable plastics made of lactic acid as the main raw material. The production process of polylactic acid is pollution-free, and the product is biodegradable. Waste polylactic acid 55 °C The above compost or oxygen enrichment and microbial action can be decomposed into carbon dioxide and water, realizing the natural material cycle and no impact on the environment. At present, lactide ring-opening polymerization technology is mainly used for the production of polylactic acid. First, lactic acid is dehydrated to produce oligomers, then the polymer is broken down to produce acrylic acid, and then ring-opening polymerization produces polylactic acid. Polylactic acid also has a reliable biosafety profile. Biodegradation. It has good mechanical properties and easy processing, and is widely used in packaging. Textile. Agricultural plastic films and biomedical polymers. The disadvantage of PLA is that the degradation conditions are harsh. However, due to the relatively low cost of polylactic acid in biodegradable plastics, the consumption of polylactic acid is in the forefront.

PBS: The raw material is succinic acid and 11.4-butanediol shrinkage. PBS is easily converted into carbon dioxide and water by various microorganisms or enzymes in nature, and is highly biocompatible. Bioabsorbent and heat-resistant. PBS can be used for packaging films. Tableware. Foam wrap material. Daily bottles. Bottle. Plastic sheeting. pesticides, fertilizers, slow-release materials and other fields. Due to the limited raw materials of succinic acid in China, the production of PBS derivatives PBAT and PBSA meets the requirements. Its performance and its performance and its performance. PBS is basically similar, but the processing performance is not as good as that of PBS.

PBAT: It is a thermoplastic degradable plastic. Fatty acids and butylene glycol are usually produced by petrochemical or biological fermentation. It has strong ductility and tensile strength, as well as good heat and impact resistance. PBAT has good film-forming properties. It is widely used in the field of disposable packaging film and agricultural film. PBAT has good biodegradability and is one of the most active degradable materials in research and market applications of degradable plastics.

PHA: PHA degradable plastics include polyhydroxyalkanoate (PHA), poly3 hydroxybutyrate (PHB) and other categories. PHA is a very specific degradation method. PHA can be completely degraded in β-hydroxybutyric acid in living organisms after use. carbon dioxide and water. Thermoplastic and thermoplastic are poor, but thermoplastic processing temperatures are unstable.