A series of monomethoxy poly(ethylene glycol)(m PEG) grafted copolyglutamates(Pm PEGs) were synthesized through ring-opening polymerization(ROP) followed by click chemistry.Supramolecular hydrogels based on polymer in...A series of monomethoxy poly(ethylene glycol)(m PEG) grafted copolyglutamates(Pm PEGs) were synthesized through ring-opening polymerization(ROP) followed by click chemistry.Supramolecular hydrogels based on polymer inclusion complexes(ICs) between Pm PEG and α-cyclodextrin(α-CD) were prepared in aqueous solution.The rheological measurements indicated their gelation properties were affected by several factors including the m PEG length,graft density and the sample concentration.These hydrogels displayed thermo-sensitive gel-sol transition under appropriate conditions due to the reversible m PEG and α-CD inclusion complexation.These hydrogels also showed p H-sensitive behavior due to the deprotonate of carboxylic acid side groups.The ICs formation of a channel-type crystalline structure induced gelation mechanism was verified by various techniques.In vitro cytotoxicity assays demonstrated that the supramolecular hydrogels are nontoxic and cytocompatible.展开更多
基金financially supported by the National Natural Science Fund for Distinguished Young Scholars(No.51225306)the National Natural Science Foundation of China(No.21434008)
文摘A series of monomethoxy poly(ethylene glycol)(m PEG) grafted copolyglutamates(Pm PEGs) were synthesized through ring-opening polymerization(ROP) followed by click chemistry.Supramolecular hydrogels based on polymer inclusion complexes(ICs) between Pm PEG and α-cyclodextrin(α-CD) were prepared in aqueous solution.The rheological measurements indicated their gelation properties were affected by several factors including the m PEG length,graft density and the sample concentration.These hydrogels displayed thermo-sensitive gel-sol transition under appropriate conditions due to the reversible m PEG and α-CD inclusion complexation.These hydrogels also showed p H-sensitive behavior due to the deprotonate of carboxylic acid side groups.The ICs formation of a channel-type crystalline structure induced gelation mechanism was verified by various techniques.In vitro cytotoxicity assays demonstrated that the supramolecular hydrogels are nontoxic and cytocompatible.
