3.3.1 Purpose and significance of preparation and ...
In biological research and long-term clinical practice，scientists have gradually realized that direct use of a unitary polymer material is often difficult to achieve the desired results.For example，the mechanical strength of polymer materials is inconsistent with the mechanical strength of human tissues，and the adhesion between the polymer materials and the tissue interface is weak.The mechanical properties of materials are lost too quickly during the degradation process，and the degradation time is different from the working time in vivo.Non-specific adsorption of tissue or blood components，which in turn triggers intractable problems such as local inflammation.In addition，considering that nanodrug needs to overcome multiple physiological barriers in order to achieve the successful delivery of the drug in the body，it is required that the prepared polymer drug carrier exhibits a variety of functions and has multiple responsiveness.It is necessary to design new synthetic ideas，explore new synthetic methods，and modify and improve traditional polymer materials.Therefore，the prospect of synthesizing ideal medical polymer materials with biomedical functions through the approach of molecular design is very broad，and the final realization of biomedical polymer materials with outstanding performance is one of the important directions for future development.(https://www.daowen.com)