writer：Zhiwei Liu, Beibei Li, Ying Dan Liu*, and Yongri Liang*
keywords：poly(vinyl chloride) gels, bending actuation, dielectric polymer gels, electroactive., ionic liquids, sensing
source：期刊
specific source：Advanced Functional Materials, 2022, 2204259
Issue time：2022年

Soft actuation materials often only perform an actuation function, and do not

achieve the function of self-sensing. In this work, the polyvinyl chloride (PVC)

gels are prepared with a plasticizer of dibutyl adipate (DBA) and small amount

of imidazolium type ionic liquids (ILs), and are demonstrated that the PVC/

DBA/ILs gels deliver the integrated bending actuation and capacitance pressure

self-sensing capability. The bending actuation performances and sensing

behavior of PVC/DBA/ILs are related to the migrability of movable ions from

ILs, which are dependent on the dissociation of anions and cations of ILs, and

the concentration of ILs. Among the ILs, the PVC/DBA gel with 3.3 wt% 1-allyl-

3-methylimidazolium bis ((trifluoromethyl)sulphonyl) imide (P/[AMIM]NTF2

(3.3 wt%)) exhibits best bending displacement of 6.6 mm (corresponding to

24° of bending angle) at 7.2 kV (180 V mm?1 of nominal electric field). In addition,

the P/[AMIM]NTF2 (3.3 wt%) exhibits 0.42 kPa–1 capacitance pressure

sensitive in the pressure range 0 to 2.2 kPa, and a sudden change in capacitance

in the pressure range 2.2–2.7 kPa with 47.5 kPa–1 of sensitivity. The

results can provide a new idea for developing integrated sensing and actuation

functions of electroactive dielectric polymer gels.