Explanation

In the physiological environment and organism, as well as under the action of microorganisms, the structure and properties of some materials or substances will change due to the effects of complex factors such as physics, chemistry, biology and machinery, such as corrosion, decomposition, dissolution or molecular weight reduction. biodegradation is a complex process, which is affected by the biological environment, including the internal environment (such as pH, ions, enzymes, etc.), microorganisms, and other biological factors. In addition to biological factors, the structure and properties of materials themselves will also affect the process of biodegradation. For example, aliphatic compounds are usually more easily biodegradation than aromatic compounds, and different types of materials have different degradation mechanisms. The biodegradation of macromolecule materials usually involves the fracture of chemical bonds in molecular chains and the destruction of other intermolecular forces; biodegradation of metallic materials is mainly due to the change of electrode potential of metals and alloy caused by the existence of elonrolyte in the object, which leads to chemical corrosion of electricity generation; The biodegradation of biological cemmics is related to the micropores in its structure, involving dissolution in vivo and degradation in cells. If the biodegradation degradation products can be discharged or absorbed through the normal metabolic mechanism of the body, they will not cause adverse effects on the body; Otherwise, it may have toxic side effects on the body.

Classification