Portal de Periódicos da CAPES

Hollow polydimethylsiloxane (PDMS) foam with a 3D interconnected network for highly sensitive capacitive pressure sensors

2020; Springer Science+Business Media; Volume: 8; Issue: 1 Linguagem: Inglês

10.1186/s40486-020-00127-8

2213-9621

Dong Hwan Kim, Young Jin Jung, Kyungkuk Jung, Dong Hwa Kwak, Dong Min Park, Myung Gyu Shin, Hyeong Jun Tak, Jong Soo Ko,

Tactile and Sensory Interactions

Abstract We propose a highly sensitive capacitive pressure sensor made of hollow polydimethylsiloxane (PDMS) foam with a three-dimensional network structure. The stiffness of the foam is adjusted by the viscosity of the PDMS solution. The fabricated PDMS-30 (PDMS 30 wt%) foam shows extremely high porosity (> 86%) approximately 19 times that of bare PDMS (PDMS 100 wt%) foam. Capacitive pressure sensors fabricated using the foam possess high sensitivity, good compressibility (up to 80% strain), and consistent output characteristics in a 2000-cycle test.