How many types of biodegradable plastics do you know?

With the continuous improvement of people's awareness of environmental protection, degradable plastics are gradually moving towards people's vision. We Chinese people pay attention to returning to the roots of fallen leaves, and we plastic people also hope that they can "return to the roots of fallen leaves". After completing its mission, they will return to nature and become one with nature. Therefore, degradable plastics came into being. Now let's talk about several representative biodegradable plastics.

With the continuous improvement of people's awareness of environmental protection, degradable plastics are gradually moving towards people's vision. We Chinese people pay attention to returning to the roots of fallen leaves, and we plastic people also hope that they can "return to the roots of fallen leaves". After completing its mission, they will return to nature and become one with nature. Therefore, degradable plastics came into being. Now let's talk about several representative biodegradable plastics.

Biodegradable materials are polymer materials that can be chemically, biologically or physically degraded or enzymatically hydrolyzed by bacteria, algae and other natural microorganisms. The ideal biodegradable biomaterials are obtained from renewable resources, which can be reused by organisms after degradation. The products are carbon dioxide and water as much as possible, so that the production and use of this material can be included in the natural cycle.

Specific types of biodegradable materials: 1. Polylactic acid (PLA): PLA has the characteristics of non-toxic, non irritating, good biocompatibility, high strength, good processability, biodegradability, etc. The sheets, fibers, and films made of PLA can be used in packaging, textile, medical and other fields after secondary processing such as thermoforming, spinning, etc. Its waste can be decomposed into water and carbon dioxide through microorganisms. 2. Polyhydroxy fatty acid ester (PHA): PHA is an intracellular polyester synthesized by many microorganisms. It is a natural polymer biomaterial, and has good biocompatibility, biodegradability and plastic thermal processing performance. It can be used as biomedical materials and biodegradable packaging materials. 3. Polybutylene succinate (PBS): PBS has excellent comprehensive performance, reasonable cost performance ratio, and wide applications, and can be used in packaging, tableware, cosmetic bottles and drug bottles, disposable medical supplies, agricultural films, pesticide and fertilizer slow release materials, biomedical polymer materials and other fields. 4. Polycaprolactone (PCL): In addition to the easy processing of thermoplastics, PCL also has the characteristics of biodegradability, biocompatibility, shape temperature controlled memory, etc. It is mainly used as medical materials such as controlled release drug carriers, fully biodegradable plastic surgical sutures, etc.