We will briefly describe the meaning of biodegradable materials and the basic principles of decomposition, and introduce in detail the types, structures, properties and preparation methods of more successful biodegradable materials. Describe the elements that compromise the biodegradability of polymeric materials. 1, Definition of polymers for biodegradable materialsWith excellent ease of use, when thrown away, it will be decomposed by natural microorganisms and become non-polluting molecular structure chemicals, such as water and carbon dioxide. Of course, the steady development of plastics and equipment. 2, the basic principle of malignant transformationAt this stage, the principle of biodegradation has not been scientifically studied. generallyIt is thought that the biodegradation of polymer materials occurs in2in the whole process. Microbes metabolize ribonucleotides outside the body, fuse with the surface of the material, and then hydrolyze to crack the polymer chain, resulting in a molecular weight lower than500g/mollow molecular weight chemicals (organic substances, sugars, etc.). The decomposed substances are digested by microorganisms, enter the human body through various means, are generated by microorganisms, or converted into energy for microbial activities, and converted by water and carbon dioxide. This decomposition not only has biophysical and biochemical functions, but also has other physical and chemical functions, such as hydrolysis and chemical reactions. This is a relatively complex whole process, mainly the size and structure of the polymer, the type of microorganism and its environmental factors such as temperature and temperature. The chemical structure of a polymer material immediately affects its biodegradable compressive strength. General, aliphatic ester bond, peptide bond>Urethane>Aliphatic aldehyde>methyl. In addition, polymer materials with high relative molecular weight, standard molecular structure ordering and high hydrophobicity are not easy to promote the corrosion and growth of microorganisms, nor do they promote biodegradation. Various studies have shown that the size of the fragments resulting from the decomposition is proportional to the thickness of the single crystal layer of the polymer material. The lower the optical activity, the more easily the copolyester is decomposed by bacteria. Pathogens break down polymer materials in the following ways: Highα-Hydroxyl components. The actual effect is remarkable. Biodegradation of aggregated materials is generallyThe following criteria need to be considered:(1) have microorganisms that can dissolve the aggregated material.(2)sufficientO2, water and mineral nutrients.(3) requires special temperature standards;pHvalue in5arrive8middle. Polymer materials have2specific research ideas. One is to generate polymers with chemical structures that are broken down by microorganisms and enzymes, and the other is to shape microbes that specialize in breaking down general polymer materials. Today’s research topic is popular, and we have successfully generated a series of biodegradable polymer materials.
The meaning and decomposition principle of biodegradable materials
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