Table 2 Comparison of foam sensing materials.

From: Artificially innervated self-healing foams as synthetic piezo-impedance sensor skins

Foam material

Tactile sensing mechanism

Proximity sensing

Sensitivity (pressure range)

Self-healing

Reference

Cross-linked PVDF-HFP/fluorosurfactant foam

R & C

√

R: 0.0982 kPa−1 (P < 10 kPa)

C: 0.378 kPa−1 (P < 10 kPa)

√

This work

MWNT-rGO-wrapped PU foam

R

N

0.088 kPa−1 (2.7 < P < 10 kPa)

N

30

Ni-foam-templated BNF@PDMS foam

C

N

0.854 kPa−1 (0 < P < 0.5 kPa)

N

22

CB@PU sponge

R

N

0.068 kPa−1 (0 < P < 2.5 kPa)

N

31

PANIH/C-RGO@PU sponge

R

N

0.0109 kPa−1 (12 < P < 25 kPa)

N

32

Sugar-templated CNT-PDMS sponge

R

N

0.03 kPa−1 (0 < P < 15 kPa)

N

21

  1. N no, √ yes, R resistive, C capacitive, MWNT multiwalled carbon nanotube, rGO reduced graphene oxide, PU polyurethane, BNF boron nitride foam, PDMS polydimethylsiloxane, CB carbon black, PANIH polyaniline nanohair, C-RGO microcracked reduced graphene oxide, CNT carbon nanotube.
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