Inherently conducting polymer modified polyurethane smart foam for pressure sensing

Brady, Sarah; Diamond, Dermot; Lau, King Tong

doi:10.1016/j.sna.2004.10.020

Cited by 139 publications

(116 citation statements)

References 11 publications

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“…Among the many materials suitable for actuators, conducting polymers have received considerable attention as promising candidates for actuator design, owing to their moderately high actuation strain at low operational voltages below 1 V. [95][96][97] Despite being good candidates for designing actuators, the brittleness and poor elongation at break 98 of conducting polymers limit their active applicability in devices. Recent reports show the potential of hydrogels being used as efficient candidates for actuator applications owing to their stimuli responsive behavior following a change in pH, temperature, or solvent composition.…”

Section: Electrospun Fibers Coated With Conductive Polymersmentioning

confidence: 99%

Electrospinning of Nanomaterials and Applications in Electronic Components and Devices

Miao

Miyauchi²,

Simmons³

et al. 2010

J. Nanosci. Nanotech.

170

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Electrospinning of nanomaterial composites are gaining increased interest in the fabrication of electronic components and devices. Performance improvement of electrospun components results from the unique properties associated with nanometer-scaled features, high specific surface areas, and light-weight designs. Electrospun nanofiber membrane-containing polymer electrolytes show improved ionic conductivity, electrochemical stability, low interfacial resistance, and improved charge-discharge performance than those prepared from conventional membranes. Batteries with non-woven electrospun separators have increased cycle life and higher rate capabilities than ones with conventional separators. Electrospun nanofibers may also be used as working electrodes in lithium-ion batteries, where they exhibit excellent rate capability, high reversible capacity, and good cycling performance. Moreover, the high surface area of electrospun activated carbon nanofibers improves supercapacitor energy density. Similarly, nanowires having quasi-one-dimensional structures prepared by electrospinning show high conductivity and have been used in ultra-sensitive chemical sensors, optoelectronics, and catalysts. Electrospun conductive polymers can also perform as flexible electrodes. Finally, the thin, porous structure of electrospun nanofibers provides for the high strain and fast response required for improved actuator performance. The current review examines recent advances in the application of electrospinning in fabricating electronic components and devices.

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Section: Electrospun Fibers Coated With Conductive Polymersmentioning

confidence: 99%

Electrospinning of Nanomaterials and Applications in Electronic Components and Devices

Miao

Miyauchi²,

Simmons³

et al. 2010

J. Nanosci. Nanotech.

170

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“…Among ICPs, polypyrrole (PPy) is a particularly promising material because of its high electrical conductivity, chemical and environmental stability in the oxidized state, low ionization potential, electrorheological properties, electrochromic effect and relatively easy of synthesis [1][2][3][4][5][6]. In fact, PPy can be potentially used in new advanced technology areas, including electronic and optoelectronic nanodevices [7], sensors [8][9][10][11][12][13], supercapacitors [14,15], energy storage devices [1,7,16], surface coatings for corrosion protection [17], electromagnetic shielding applications [18][19][20], smart textiles [21,22] and even in medical applications [4,[23][24][25][26]. However, the poor mechanical performances and the difficult processability (insolubility and infusibility) [2,3,19,20,27,28] have hampered the use of PPy for technological applications.…”

Section: Introductionmentioning

confidence: 99%

Novel electrically conductive polyurethane/montmorillonite-polypyrrole nanocomposites

Ramôa¹,

Barra²,

Merlini³

et al. 2015

Express Polym. Lett.

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Abstract. This work describes the production of electrically conductive nanocomposites based on thermoplastic polyurethane (TPU) filled with montmorillonite-dodecylbenzenesulfonic acid-doped polypyrrole (Mt-PPy.DBSA) prepared by melt blending in an internal mixer. The electrical conductivity, morphology as well as the rheological properties of TPU/MtPPy.DBSA nanocomposites were evaluated and compared with those of TPU nanocomposites containing different conductive fillers, such as polypyrrole doped with hydrochloride acid (PPy.Cl) or dodecylbenzenesulfonic acid (PPy.DBSA) or montmorillonite-hydrochloride acid-doped polypyrrole (Mt-PPy.Cl), prepared with the same procedure. The TPU/MtPPy.DBSA nanocomposites display a very sharp insulator-conductor transition and the electrical percolation threshold was about 10 wt% of Mt-PPy.DBSA, which was significantly lower than those found for TPU/Mt-PPy.Cl, TPU/PPy.Cl and TPU/PPy.DBSA. Morphological analysis highlights that Mt-PPy.DBSA filler was better distributed and dispersed in the TPU matrix, forming a denser conductive network when compared to Mt-PPy.Cl, PPy.Cl and PPy.DBSA fillers. This morphology can be attributed to the higher site-specific interaction between TPU matrix and Mt-PPy.DBSA. The present study demonstrated the potential use of Mt-PPy.DBSA as new promising conductive nanofiller to produce highly conductive polymer nanocomposites with functional properties.

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“…The more general issue of preparing stretchable conductors has been addressed by using conducting polymers [6], doped elastomers [7], using ultra thin silicon substrates [8][9][10] or more simply metal films on elastomeric substrates, like gold on PDMS, this last option having shown the best results to date in term of low resistivity ( ρ = 3x10 -5 ohm.cm), fatigue behavior and stability [11][12][13]. The main challenges associated with these metal/elastomer systems are the low strain at failure of the metal film and the compressive stresses resulting from post-deposition cooling [14,15].…”

Section: Introductionmentioning

confidence: 99%

Amorphous carbon interlayers for gold on elastomer stretchable conductors

Manzoor¹,

Tuinea‐Bobe²,

McKavanagh³

et al. 2011

J. Phys. D: Appl. Phys.

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Gold on polydimethylsiloxane (PDMS) stretchable conductors were prepared using a novel approach by interlacing an hydrogenated amorphous carbon (a-C:H) layer between the deposited metal layer and the elastomer. AFM analysis of the a-C:H film surface before gold deposition shows nanoscale buckling, the corresponding increase in specific surface area corresponds to a strain compensation for the first 4-6 % of bi-axial tensile loading. Without this interlayer, the deposited gold films show much smaller and uni-directional ripples as well as more cracks and delaminations. With a-C:H interlayer, the initial electrical resistivity of the metal film decreases markedly (280-fold decrease to 8x10 -6 Ω.cm). This is not due to conduction within the carbon interlayer; both a-C:H/PDMS and PDMS substrates are electrically insulating. Upon cyclic tensile loading, both films become more resistive, but return to their initial state after 20 tensile cycles up to 60% strain. Profiling experiments using Secondary ion mass spectroscopy (SIMS) and X-ray photoelectron spectroscopy (XPS) indicate that the a-C:H layer intermixes with the PDMS, resulting in a graded layer of decreasing stiffness. We believe that both this graded layer and the surface buckling contribute to the observed improvement in the electrical performance of these stretchable conductors.

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Inherently conducting polymer modified polyurethane smart foam for pressure sensing

Cited by 139 publications

References 11 publications

Electrospinning of Nanomaterials and Applications in Electronic Components and Devices

Electrospinning of Nanomaterials and Applications in Electronic Components and Devices

Novel electrically conductive polyurethane/montmorillonite-polypyrrole nanocomposites

Amorphous carbon interlayers for gold on elastomer stretchable conductors

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