With the increasing prominence of energy prices and environmental problems, the pace of replacing traditional petroleum products with biodegradable biomaterials worldwide is gradually accelerating. It is expected that the government will issue relevant preferential policies, laws and regulations to encourage market application. The large-scale application prospect of biodegradable materials is optimistic.
Biodegradable materials include polymer materials directly prepared by biotechnology, such as polyhydroxy fatty acid esters (PHA). A class of materials prepared and polymerized by biotechnology, such as polylactic acid, PBS, polyamino acid, etc. In addition, starch-based biodegradable plastics, carbon dioxide copolymer aliphatic polycarbonate (APC), etc.
Starch-based biodegradable plastics are plastics products which are blended with starch and other polymers after modification and grafting reaction. It can be used as packaging materials, shock-proof materials, plastic film, food containers, toys, etc.
Polymerization of PLA lactic acid into macromolecule materials is non-toxic, non-irritating, high strength, easy processing, forming and good biocompatibility. The products can be completely degraded after use. Therefore, PLA is a kind of bio-environmental protection material that can truly achieve ecological and economic impact. It is the most active and fastest-growing biodegradable plastics developed in recent years.
Polybutylene succinate is a biodegradable plastic with the best comprehensive properties. PBS is widely used in packaging, tableware, cosmetics bottles, disposable medical supplies, agricultural films, pesticide and fertilizer slow-release materials, biomedical polymer materials and other fields because of its excellent comprehensive performance and reasonable cost performance.
Polyhydroxy fatty acid esters are intracellular polyesters synthesized by a variety of bacteria under specific conditions. More than 150 different forms of PHA have been synthesized by more than 90 genera of bacteria. At present, the commercialized PHA products mainly include Polyhydroxybutyric acid (PHB), copolymer of hydroxybutyric acid and hydroxy valeric acid (PHBV), copolymer of hydroxybutyric acid and hydroxy hexanoic acid (PHBHx).
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