| When the gel is damaged,tiny cracks will appear in the internal structure of the gel.It is particularly important to restore its original function when the damage occurs.Conductive hydrogels generally lack high mechanical strength.Meanwhile,the conductive hydrogels are difficult to reuse after being damaged,and the service life is relatively insufficient,which limits the application of gels.Backed on this situation,the research contents of this paper are as follows:Firstly,fabricating a mechanical-reinforced Ac-PCEC/PAA-Fe（III）hydrogel with self-healable and conductive properties via incorporating hydrophobic interaction,metal coordination bond,and hydrogen bond.Acrylate-terminated PCEC（Ac-PCEC）was synthesized to fabricate Ac-PCEC/PAA-Fe（III）hydrogel.Ac-PCEC was selected as a covalent crosslinking point,while ionic coordination bonds between Fe3+and carboxyl groups and（intra-and intermolecular）hydrogen bonds were served as the physical crosslinking points.The hydrophobic interaction of Ac-PCEC proved the mechanical properties of the hydrogels.The metal coordination bonds and hydrogen bonds provided favorable self-healing,and self-recovery properties of the hydrogels.Secondly,the OSA-PAM hydrogels were prepared in the presence of polysaccharide template-oxidized sodium alginate（OSA）.First,polysaccharide template（OSA）with aldehyde group was prepared.OSA-AM was synthesized by coupling OSA with acrylamide（AM）through schiff base reaction,which initiated the polymerization of AM monomer in aqueous solution to fabricate OSA-PAM hydrogel.The OSA-PAM hydrogels exhibited excellent self-healing properties due to dynamic schiff base and hydrogen bond.Introducing OSA template before polymerization was conducive to the chain entanglement in OSA-PAM hydrogels,which provided OSA-PAM hydrogels superior mechanical properties,and self-healing properties.The OSA-PAM hydrogels presented conductive performance due to the free ions. |
