Dilute Polymerization of Aniline on PDMS Substrate via Surface Modification Using (3-Aminopropyl)Triethoxysilane for Stretchable Strain Sensor

Abstract

Stretchable strain sensors are capable of acquiring data when in contact with human skin or equipment and are widely used in wearable applications. Most strain sensors have tensile properties of less than 20% and have limitations regarding body motion linkage, complex sensor structure, and motion nonreliability. To address these problems, we developed a high tension and high sensitivity sensor with a gauge factor over 40 and tensile stress about 50%. Polydimethylsiloxane (PDMS) was selected as the flexible substrate to ensure tensile strength, and polyaniline (PANI) was used to measure the resistance changes in the sensor. In particular, problems regarding poor uniformity of PANI on PDMS were resolved by surface treatment of the PDMS, wherein PANI polymerization was performed sequentially after forming a self-assembled monolayer (SAM) on the PDMS substrate. O2 plasma and (3-aminopropyl)triethoxysilane were used to form the SAM. It is expected that this sensor can obtain stable characteristics even under high tensile stress through the evenly formed PANI films on the surface-treated PDMS substrate and may be used in various flexible sensor applications.

Magnetically Actuated Transport Pipeline with Self-Perception

“…The development of tactile sensing and corresponding integration with flexible devices is of great significance in building smart soft devices [1]. During the past decade, flexible sensors and electrothermal film based on polydimethylsiloxane (PDMS) matrix have gained extensive a ention [2][3][4][5][6][7][8]. Yim CJ et al developed a high-tension and high-sensitivity sensor based on PDMS matrix with a gauge factor over 40 and tensile stress about 50% [5].…”

“…During the past decade, flexible sensors and electrothermal film based on polydimethylsiloxane (PDMS) matrix have gained extensive a ention [2][3][4][5][6][7][8]. Yim CJ et al developed a high-tension and high-sensitivity sensor based on PDMS matrix with a gauge factor over 40 and tensile stress about 50% [5]. Generally, the PDMS-based flexible sensors respond to a wide range of tactile external stimuli (such as bending and compression) and exhibit good stability and ultra-high sensitivity (gauge factor >100) [1,[9][10][11][12].…”

The 0-3 Lead Zirconate-Titanate (PZT)/Polyvinyl-Butyral (PVB) Composite for Tactile Sensing

“…Tactile sensing is an essential tool used in instrumentation electronics for evaluating physical parameters such as stress, strain, pressure, and force [ 1 , 2 , 3 ]. A wide range of technologies, including resistive, capacitive, piezoelectric, triboelectric, optical, and magnetic sensors are available for tactile sensing.…”