| The reason why traditional gel can’t get back to the initial situation after being destroyed is that it doesn’t have the ability of self-healing,which not only shortens the service life of the materials,but also can’t meet the needs of life and industry,and there are also serious security risks in the process of using.Self-healing gels have attracted wide attention due to their excellent attributes of perceiving external force damage and getting the self-healing in time,especially for the self-healing gels produced by dynamic covalent cross-linking,which gets high efficiency of self-healing and excellent effect,are used in various fields such as lightelectric materials,wound dressings,flexible supercapacitors and so on.Compared with hydrogels,ionic liquid gels have excellent attributes such as wide range of available temperature,strong electrical conductivity,high stability and high mechanical strength,which has become the hotpot of the research in the recent years.This paper make use of the AGNH2,modified by amino,the self-healing gel was prepared by the Schiff-base reaction of the cross-linking agent glutaraldehyde(GA)/methylglyoxal and AG-NH2,and its micro structure and macro attributes were investigated systematacially.(1)High-molecular polymer AG-NH2 was produced through covalent cross-linking of ethylenediamine and agarose by N,N′-carbonyl diimidazole(CDI)activation method,using the modificability of agarose.The appearance of the new peak at 1715 cm-1 was observed by Fourier transform infrared spectrometry(FT-IR)and the analysis of element proved the successful modification of amino group.(2)The crosslinked Schiff base hydrogel was produced from AG-NH2,GA and pyruvic aldehyde,and the successful formation of Schiff base was proved by FT-IR.The hydrogel has good attribute of self-healing,injectable,adhesion and water resistance,which have been proved by eyes,optical microscope and rheological measurement.The micro structure of the gel is intense three tribble net featured structure with several holes was proved by the result of scanning electron microscope(SEM).The rheological results also show that the elastic featured dominantly of this kind of gel,gel has strong mechanical strength,and different values of the isomorphic building element also have a great effect on the strength of the gel.Meanwhile,the hydrogel has good water resistance,which can keep a good shape in water.Because of the excellent adhesion and injectable of the AG-NH2,it has great application potential on the drug transportation and wound dresses.The characteristic of porous structure makes it can be applied to the purification of the dye in wastewater.(3)Pure ionogels and glutaraldehyde cross-linked ionogels based on the AG-NH2 were produced by the solvent with ionic liquid.The self-healing ability of pure ionogels is obtained by hydrogen bonding,while glutaraldehyde cross-linked ionogels is due to the dynamic action of Schiff-base,which is proved by FT-IR results.It was observed by SEM that the ionogel had a more compact three-dimensional network structure,different from the micro structure of AG-NH2 hydrogel.Rheological test proved that with ionogels are at the same concentration of AG-NH2,the r value and the concentration of AG-NH2 are related to the mechanical strength of ionogels.Rheological test made a progress on proving the excellent self-healing attribute of the gel.Compared with hydrogels,ionogels have better viscoelasticity and mechanical strength due to the tighter micro structure of ionic liquid gels.Because of the excellent attribute of the ionic liquid of the AG-NH2 ionogel,it will be used in solid electrolyte area hopefully. |
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