Polyaniline/modified montmorillonite/polyacrylamide(PANI/DCM/PAM)conductive hydrogels(PDPG)with polyaniline concentration gradient distribution were prepared by aniline pre-penetration method using montmorillonite modified polyacrylamide hydrogel as the substrate.The mechanical properties and strain sensing performance were investigated.The results showed that the stability of the chitosan-modified montmorillonite dispersion was significantly improved.The tensile strength and elongation at break of the PDPG hydrogel prepared by aniline pre-penetration for 5 s and dehydration for 5 h reached 194 kPa and 685％,respectively.The conductivity and sensing perform-ance of PDPG hydrogels can be regulated by varying the pre-penetration time of aniline.In the strain range of 0 to 400％,the maximum sensitivity of PDPG hydrogel was 7.02.The flexible strain sensor based on PDPG conductive hydrogels can monitor the full-scale motion of human body and has good cycle stability.
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