The invention discloses a preparation method of a flexible
electromagnetic shielding type
force sensor based on a coaxial structure, and belongs to the field of
flexible electronics and intelligent sensors. According to the method, a coaxial wet
spinning process is adopted, a core-sheath structure conductive
fiber is constructed, a core layer is made of a multi-walled
carbon nanotube (CNT) and
thermoplastic polyurethane (TPU)
composite material, and a sheath layer is made of a
nickel-coated
carbon nanotube (Ni-CNT) and TPU
composite material. By regulating and controlling the proportion of the core sheath, the construction of the gradient conductive network is realized, and the sensing sensitivity, the
electromagnetic shielding performance and the mechanical flexibility are improved. The obtained Ni-CNT-coated CNT
fiber is made into fabric and integrated in a sensing glove, and multi-finger bending detection and
wireless man-
machine interaction control are achieved. The sensor has the advantages of high sensitivity, wide strain detection range and excellent
electromagnetic shielding effectiveness, is suitable for the fields of intelligent wearing, anti-interference man-
machine interface and fire-fighting equipment, and can also be expanded to complex application scenes such as
aerospace teleoperation.