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In the field of biomedicine, biodegradation technology is the most widely used. Degradable polymer materials mainly include medical polymer materials, ecological polymer materials and natural polymer materials. Supercritical carbon dioxide is a normal temperature and high pressure solvent, which can be made into polymer drug coatings through biodegradable plastics. This type of polymer (composed of molecules with repeating structural units forming long chains) is used to encapsulate drugs and then injected into the body. Based on lactic acid, it is usually a compound produced in the body, so it can be discharged naturally.
 

The coating is designed to control the release over a period of time and reduce the number of injections required to achieve an effective treatment effect. Professor Steve Holder pointed out that biodegradable polymers are particularly attractive for drug release, because once they enter the body, they can be degraded into soluble, non-toxic by-products without recycling or further processing. In vivo, pre-selection of different degradation rates can be achieved.
 

Other biomedical applications include the use of elastic shape memory polymers for biodegradation. Currently, degradable thermoplastic polymer materials can be used in minimally invasive surgery.