Integrated Bending Actuation and the Self-Sensing Capability of Poly (Vinyl Chloride) Gels with Ionic Liquids
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.