▎ 摘　　要

NOVELTY - Preparing gradient macroporous conductive composite hydrogel involves (a) preparing graphene oxide/polyacrylamide composite hydrogel containing a foaming agent, (b) preparing graphene/polyacrylamide conductive composite hydrogel with a gradient macroporous structure, and (c) absorbing aniline by using the graphene/polyacrylamide conductive composite hydrogel with the gradient macroporous structure, and then initiating in-situ polymerization. USE - Method for preparing gradient macroporous conductive composite hydrogel used in flexible strain sensor, or preferably used in wearable electronic equipment such as flexible sensors, and human motion monitoring. ADVANTAGE - The gradient macroporous conductive composite hydrogel has excellent mechanical property and sensing property, high sensitivity, wide strain detection range and good circulation stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a gradient macroporous conductive composite hydrogel used in a flexible strain sensor, prepared by the method.