Multi-sensitive hydrogel system based on cyclodextrin host-guest recognition The environmentally sensitive hydrogel system can respond to external stimuli such as swelling and shrinking or gel-sol transition, so it can be used as a superior smart material in drug controlled release, biomimetic tissue, molecular devices, active separation, organic synthesis, etc. The field produces a wide range of applications. In recent years, researches on the preparation of multiple environmentally sensitive gel systems based on non-covalent bond interactions such as host-guest identification have been favored. Their intelligent response characteristics have made them more advantageous and practical in applications such as biomedicine.
Associate Researcher Li Bangjing of Chengdu Institute of Biology, Chinese Academy of Sciences has continuously explored in the field of biomedical materials and natural polymer self-assembly, and cooperated with researchers from Sichuan University to complete β-cyclodextrin grafted sodium alginate and ferrocene modified polyether The synthesis of the two ends of F127 found that the two can cleverly form a three-dimensional network system through the recognition of the host and guest in the water system. The system can make sol-gel intelligent response in response to temperature changes, and the critical gel concentration CGC and temperature CGT of the system both show obvious advantages over single polyether; when the system is added with the oxidant sodium hypochlorite, the system can Ferrocene is oxidized and de-inclusion with β-cyclodextrin leads to gel-sol transformation; at the same time, when the system embeds glucose oxidase, adding glucose to produce hydrogen peroxide as an oxidant due to the enzymatic reaction can also make dimero The iron becomes oxidized and the system undergoes gel-sol transformation.
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