Multifunctional flexible carbon black/polydimethylsiloxane piezoresistive sensor with ultrahigh linear range, excellent durability and oil/water separation capability

Zhai, Wei; Xia, Quanjun; Zhou, Kangkang; Yue, Xiaoyan; Ren, Miaoning; Zheng, Guoqiang; Dai, Kun; Liu, Chuntai; Shen, Changyu

doi:10.1016/j.cej.2019.04.142

Cited by 173 publications

(99 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, Zhai et al reported a facile and cost-effective strategy to prepare a 3D porous sensor based on CB/PDMS. The sensor exhibited high sensibility, excellent stability, and a large compression range of up to 91% [ 48 ]. Similarly, Ma et al successfully used MWCNT/RGO synergistic conductive networks with polyurethane sponges to fabricate lightweight porous piezoresistive sensors, with high sensitivity, outstanding compressibility (up to 75%), and very low densities (0.027–0.064 g cm −3 ) [ 20 ].…”

Section: Background Studymentioning

confidence: 99%

Facile Fabrication of 3D Porous Sponges Coated with Synergistic Carbon Black/Multiwalled Carbon Nanotubes for Tactile Sensing Applications

et al. 2020

View full text Add to dashboard Cite

Recently, flexible tactile sensors based on three-dimensional (3D) porous conductive composites, endowed with high sensitivity, a wide sensing range, fast response, and the capability to detect low pressures, have aroused considerable attention. These sensors have been employed in different practical domain areas such as artificial skin, healthcare systems, and human–machine interaction. In this study, a facile, cost-efficient method is proposed for fabricating a highly sensitive piezoresistive tactile sensor based on a 3D porous dielectric layer. The proposed sensor is designed with a simple dip-coating homogeneous synergetic conductive network of carbon black (CB) and multi-walled carbon nanotube (MWCNTs) composite on polydimethysiloxane (PDMS) sponge skeletons. The unique combination of a 3D porous structure, with hybrid conductive networks of CB/MWCNTs displayed a superior elasticity, with outstanding electrical characterization under external compression. The piezoresistive tactile sensor exhibited a high sensitivity of (15 kPa−1), with a rapid response time (100 ms), the capability of detecting both large and small compressive strains, as well as excellent mechanical deformability and stability over 1000 cycles. Benefiting from a long-term stability, fast response, and low-detection limit, the piezoresistive sensor was successfully utilized in monitoring human physiological signals, including finger heart rate, pulses, knee bending, respiration, and finger grabbing motions during the process of picking up an object. Furthermore, a comprehensive performance of the sensor was carried out, and the sensor’s design fulfilled vital evaluation metrics, such as low-cost and simplicity in the fabrication process. Thus, 3D porous-based piezoresistive tactile sensors could rapidly promote the development of high-performance flexible sensors, and make them very attractive for an enormous range of potential applications in healthcare devices, wearable electronics, and intelligent robotic systems.

show abstract

Section: Background Studymentioning

confidence: 99%

Facile Fabrication of 3D Porous Sponges Coated with Synergistic Carbon Black/Multiwalled Carbon Nanotubes for Tactile Sensing Applications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Sensors composed of a foam substrate present an advantageous approach to fabricate strain and motion sensors with large elongation linearity. Strain sensors have been fabricated on polyurethane and PDMS substrates with a large strain range up to 150%.…”

Section: Other Fabrication Techniquesmentioning

confidence: 99%

“…The composite was then immersed in water so that the salt microcrystals could dissolve, leaving a porous microstructure with pore sizes between 100 and 300 μm. The porous structure reduced the compression modulus of the composite, allowing a larger compression at the same applied pressure PDMS foams have been fabricated with the assistance of sacrificial sugar crystals . Sugar was vigorously mixed with the PDMS prepolymer, curing agent, and carbon black powder, with subsequent curing and dissolution of sugar in water.…”

Section: Other Fabrication Techniquesmentioning

confidence: 99%

Fabrication and Patterning Methods of Flexible Sensors Using Carbon Nanomaterials on Polymers

Costa

Choi

2020

Advanced Intelligent Systems

View full text Add to dashboard Cite

Flexible sensors composed of carbon nanostructures and elastic materials have been developed for healthcare monitoring, environmental monitoring, disposable biochemical or electrochemical sensors, and many other applications. Fabrication approaches for such sensors and their advantages and current issues related to patterning high-performance flexible sensors are reviewed. A focus is placed on patterning techniques for carbon-based flexible sensors including carbon nanotubes, graphene, and other carbon nanostructures. First, novel patterning techniques for nanomaterials are described, along with their current challenges. Next, emerging flexible sensors including humidity, temperature, strain, and pressure sensors are discussed. Finally, the challenges and perspectives for flexible sensors are addressed. REVIEW www.advintellsyst.com

show abstract

“…Flexible and stretchable elastomers, such as polydimethylsiloxane (PDMS), have been employed as the matrix and broadly used in the development of porous nanocomposites. Due to its high flexibility, large Poisson ratio, transparency, and biocompatibility, PDMS has been widely reported in literature for the development of flexible nanocomposites [4][5][6]. These attributes have led to its use in the development of highly flexible and stretchable nanocomposite strain sensors and pressure sensors for several different applications [7,8].…”

Section: Introductionmentioning

confidence: 99%

Rapid Microwave Polymerization of Porous Nanocomposites with Piezoresistive Sensing Function

et al. 2020

View full text Add to dashboard Cite

In this paper, polydimethylsiloxane (PDMS) and multi-walled carbon nanotube (MWCNT) nanocomposites with piezoresistive sensing function were fabricated using microwave irradiation. The effects of precuring time on the mechanical and electrical properties of nanocomposites were investigated. The increased viscosity and possible nanofiller re-agglomeration during the precuring process caused decreased microwave absorption, resulting in extended curing times, and decreased porosity and electrical conductivity in the cured nanocomposites. The porosity generated during the microwave-curing process was investigated with a scanning electron microscope (SEM) and density measurements. Increased loadings of MWCNTs resulted in shortened curing times and an increased number of small well-dispersed closed-cell pores. The mechanical properties of the synthesized nanocomposites including stress–strain behaviors and Young’s Modulus were examined. Experimental results demonstrated that the synthesized nanocomposites with 2.5 wt. % MWCNTs achieved the highest piezoresistive sensitivity with an average gauge factor of 7.9 at 10% applied strain. The piezoresistive responses of these nanocomposites were characterized under compressive loads at various maximum strains, loading rates, and under viscoelastic stress relaxation conditions. The 2.5 wt. % nanocomposite was successfully used in an application as a skin-attachable compression sensor for human motion detection including squeezing a golf ball.

show abstract

Multifunctional flexible carbon black/polydimethylsiloxane piezoresistive sensor with ultrahigh linear range, excellent durability and oil/water separation capability

Cited by 173 publications

References 51 publications

Facile Fabrication of 3D Porous Sponges Coated with Synergistic Carbon Black/Multiwalled Carbon Nanotubes for Tactile Sensing Applications

Facile Fabrication of 3D Porous Sponges Coated with Synergistic Carbon Black/Multiwalled Carbon Nanotubes for Tactile Sensing Applications

Fabrication and Patterning Methods of Flexible Sensors Using Carbon Nanomaterials on Polymers

Rapid Microwave Polymerization of Porous Nanocomposites with Piezoresistive Sensing Function

Contact Info

Product

Resources

About