PDMS-ZnO Piezoelectric Nanocomposites for Pressure Sensors

Jeronimo, Karina; Koutsos, Vasileios; Cheung, Rebecca; Mastropaolo, Enrico

doi:10.3390/s21175873

Cited by 36 publications

(15 citation statements)

References 53 publications

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“…36–1451. [ 31 ] In PDMS‐ZnO‐HCl signals corresponding to samples holder are more intense than signals attributed to PDMS due to the smaller thickness of this sample. In addition, no peaks assigned to ZnO are observed.…”

Section: Resultsmentioning

confidence: 99%

“…Typically, crystal salts are used in higher mass percent content [12,14] and removal of macro-sized crystals from PDMS can be difficult and energy consuming due to the intricate pore connection. [14,30,31] These differences could explain the larger mass absorption capacity of sponges prepared with only 15% w/w of ZnO nanoparticles.…”

Section: Absorption Of Solventsmentioning

confidence: 99%

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High removal of chlorinated solvents by reusable polydimethylsiloxane based absorbents

Medina

Cánneva

Molinari

et al. 2022

Polymer Engineering & Sci

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The objective of this work is to prepare absorbent materials based on polydimethylsiloxane (PDMS) for the absorption of organic solvents by a relative simple method, with large absorption capacities and reusability. Different particles (ZnO, MgSO4, ZnCl2, and NaHCO3) were first incorporated in PDMS and then removed by immersion in HCl (c) or water. The absorbent materials were characterized by TGA, mercury porosimetry, stress–strain curves, SEM, EDS, XPS, FTIR, and water contact angle. The materials can absorb polar organic chlorinated solvents (carbon tetrachloride, dichloroethene, dichloromethane, and chloroform) more than four times its own weight. Other solvents were also tested showing 2–3 times its own weight. Additionally, these materials show demulsification properties and absorption of oleophilic compounds. The reusability of the material makes them good candidates for remediation of polluted water.

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Section: Resultsmentioning

confidence: 99%

Section: Absorption Of Solventsmentioning

confidence: 99%

High removal of chlorinated solvents by reusable polydimethylsiloxane based absorbents

Medina

Cánneva

Molinari

et al. 2022

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…Thereafter, curing was performed at 100 °C for 48 min in an oven to complete the fabrication of bulk PDMS, followed by cooling and removal from the Petri dish [ 18 ]. Finally, the PDMS was cut using a mold made according to the ASTM D412 model [ 30 , 31 , 32 ].…”

Section: Methodsmentioning

confidence: 99%

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

Yim¹,

Choy²,

Youi³

et al. 2022

Sensors

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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.

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“…Flexible pressure sensors have been widely concerned by researchers due to their great application prospects in health monitoring, , medical care, , and human–computer interaction. , According to their sensing mechanism, flexible pressure sensors can be mainly divided into piezoresistive sensor, − piezocapacitive sensor, − and piezoelectric sensor. , Among them, piezocapacitive sensors have been widely studied because of their simple structure, low power consumption, good stability, and fast dynamic response. However, piezocapacitive sensors often face the problem of low sensitivity.…”

Section: Introductionmentioning

confidence: 99%

One-Step Laser Direct-Printing Process of a Hybrid Microstructure for Highly Sensitive Flexible Piezocapacitive Sensors

Chen

Guo

Xiao

et al. 2023

ACS Appl. Mater. Interfaces

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Microstructures can effectively improve the sensing performance of flexible piezocapacitive sensors. Simple, low-cost fabrication methods for microstructures are key to facilitating the practical application of piezocapacitive sensors. Herein, based on the laser thermal effect and the thermal decomposition of glucose, a rapid, simple, and low-cost laser direct-printing process is proposed for the preparation of a polydimethylsiloxane (PDMS)-based electrode with a hybrid microstructure. Combining the PDMS-based electrode with an ionic gel film, highly sensitive piezocapacitive sensors with different hybrid microstructures are realized. Due to the good mechanical properties brought about by the hybrid microstructure and the double electric layer induced by the ionic gel film, the sensor with a porous X-type microstructure exhibits an ultrahigh sensitivity of 92.87 kPa–1 in the pressure range of 0–1000 Pa, a wide measurement range of 100 kPa, excellent stability (>3000 cycles), fast response time (100 ms) and recovery time (101 ms), and good reversibility. Furthermore, the sensor is used to monitor human physiological signals such as throat vibration, pulse, and facial muscle movement, demonstrating the application potential of the sensor in human health monitoring. Most importantly, the laser direct-printing process provides a new strategy for the one-step preparation of hybrid microstructures on thermal curing polymers.

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PDMS-ZnO Piezoelectric Nanocomposites for Pressure Sensors

Cited by 36 publications

References 53 publications

High removal of chlorinated solvents by reusable polydimethylsiloxane based absorbents

High removal of chlorinated solvents by reusable polydimethylsiloxane based absorbents

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

One-Step Laser Direct-Printing Process of a Hybrid Microstructure for Highly Sensitive Flexible Piezocapacitive Sensors

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