The development and characterization of carbon nanofiber/polylactic acid filament for additively manufactured piezoresistive sensors

Hernandez, Julio A.; Maynard, Cole; González, David; Viz, Monica; O'Brien, Corey; Garcia, Jose; Newell, Brittany; Tallman, Tyler N.

doi:10.1016/j.addma.2022.102948

Cited by 9 publications

(6 citation statements)

References 44 publications

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“…The FDM refers to a 3D printing technique in which prefabricated filaments made from a blend of conductive fillers and thermoplastic polymers are deposited on the building platform into programmed patterns after heating. [27][28][29][30] This method offers high accuracy and excellent stability, but few types of thermoplastic elastic polymers and insufficient biocompatibility have limited the application of this technology in the flexible sensors field. Based on the fluid shear thinning principle, E-3DP technology aims to deposit composite conductive inks into a fluid medium over a precured support layer under the driving of air pumps.…”

Section: Introductionmentioning

confidence: 99%

“…This approach is simple and adaptable, but the conductive filler in the conductive inks is easy to shed after curing, which strongly affects the stability and service life of the sensor. The FDM refers to a 3D printing technique in which prefabricated filaments made from a blend of conductive fillers and thermoplastic polymers are deposited on the building platform into programmed patterns after heating 27–30 . This method offers high accuracy and excellent stability, but few types of thermoplastic elastic polymers and insufficient biocompatibility have limited the application of this technology in the flexible sensors field.…”

Section: Introductionmentioning

confidence: 99%

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A stretchable flexible strain sensor with high sensitivity and fast response fabricated by embedded 3D printing of the hybrid polydimethylsiloxane/conductive carbon paste composites

Xiao,

Li,

et al. 2024

J of Applied Polymer Sci

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Flexible strain sensors are widely used in the fields of human motion monitoring, electronic skin, and soft robotics. In this work, to satisfy the demand for high‐sensitivity, low‐cost, and fast‐response flexible strain sensors for these fields, embedded 3D printing (E‐3DP) technology is employed to fabricate highly sensitive and fast‐responding flexible strain sensors. The effects of conductive carbon paste concentration and printing process parameters by establishing the E‐3DP system on the piezoresistive behavior of the sensor were investigated. The results show that the gauge factor of the strain sensor is about 36.1 and 247.67, under the strain of 0%–40% and 40%–45%, respectively. Its response/recovery time is about 250/350 ms. On this basis, the sensor can also accurately sense and distinguish the motion in distinct parts of the human body, demonstrating that the flexible strain sensor manufactured by the method possesses the potential to be widely used in the fields of human motion monitoring, electronic skin, and soft robotics.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A stretchable flexible strain sensor with high sensitivity and fast response fabricated by embedded 3D printing of the hybrid polydimethylsiloxane/conductive carbon paste composites

Xiao,

Li,

et al. 2024

J of Applied Polymer Sci

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“…Viscosity, conductivity, surface charge, and surface tension were identified as the main factors affecting uniform and fine fiber formation [11]. Based on the various functions of LPFs, they has been widely applied in many scientific areas, such as adhesion of neurons [16], cell growth [17], transportation of bioactive compounds [18], sensor development [19], enzyme immobilization [20], and creation of biodegradable food containers [12]. Due to the broad applications of LFPs, both synthetic and natural polymers have been explored to obtain this nanoscale structures [21].…”

Section: Introductionmentioning

confidence: 99%

Electrospun Konjac Glucomannan/Polyvinyl Alcohol Long Polymeric Filaments Incorporated with Tea Polyphenols for Food Preservations

Huang,

Liao,

et al. 2024

Foods

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In this study, nanofiber films were prepared by electrospinning technology with polyvinyl alcohol (PVA) and konjac glucomannan (KGM) as raw materials. Tea polyphenols (TPs) were incorporated in the above matrix, which increased physicochemical (thermal and mechanical characteristics) and antibacterial properties of the nanofiber films. The release behavior of phenolic compounds from PVA/KGM-TPs nanofiber films was determined in different food simulants; antioxidant and antibacterial activity of the films were also evaluated. The results showed that the addition of KGM increased the physical and chemical properties of the films. The tensile strength (TS) and elongation at break (EB) increased from 5.40 ± 0.33 to 10.62 ± 0.34 and from 7.24 ± 0.32 to 18.10 ± 0.91, respectively. PVA/KGM-TPs nanofiber films performed controlled release of TPs, with final release of 49.17% in 3% acetic acid, 43.6% in 10% ethanol, and 59.42% in 95% ethanol. The nanofiber films showed good antioxidation properties, with the free radical scavenging rate increasing from 1.33% to 25.61%, and good antibacterial properties with inhibition zones against E. coli and S. aureus of 24.33 ± 0.47 mm and 34.33 ± 0.94 mm, respectively. In addition, the as-prepared films showed significant preservation performance for raw bananas at 25 °C.

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“…This electrical conductivity is also often stimulus responsive, meaning that the modified PMC is self-sensing. For example, this has been studied for self-sensing of mechanical deformation and damage, [1][2][3][4] temperature and thermal effects, [5][6][7] or, among others, chemical condition. [8][9][10] • Permittivity Beyond just imparting electrical conductivity, other researchers have used various nanofiller phases to modify the permittivity of PMCs.…”

Section: Introductionmentioning

confidence: 99%

On the electro-magnetic properties of combined carbon nanotube and carbon-coated iron nanoparticle-modified polymer composites

Arora

Tallman

2023

Behavior and Mechanics of Multifunctional Materials XVII

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Nanofiller-modified polymer matrix composites (PMCs) have been much studied as multi-functional materials. To date, however, work in this area has overwhelmingly focused on single-filler composites such as, for example, carbon nanotube (CNT)-modified polymers. Furthermore, work on multi-filler systems has focused on fillers with complementary attributes (e.g. achieving higher electrical conductivity in CNT + graphene composites than can be achieved via modification with either CNTs or graphene alone). As an alternative, we herein propose a new approach: dissimilar functional fillers selected for synergistic interactions. That is, we seek to identify combinations of nanofillers that interact with each other in order to give rise to unique multi-functional capabilities not achievable by either filler individually. To that end, we present preliminary work on CNT + carbon-coated iron nanoparticle (CCFeNP)-modified PMCs. CNTs and CCFeNPs were selected due to their complementary geometry (i.e. high aspect ratio CNTs and spherical CCFeNPs, which gives rise to higher electrical conductivity) and their potential for synergistic electro-magnetic interactions in a percolated network. These preliminary results report on the electro-magnetic properties of CNT + CCFeNP/epoxy composites including AC and DC conductivity and magnetic permeability as a function of varying CNT and CCFeNP concentration. It is hoped that further exploration into synergistic functional filler combinations will lead to new multi-functional capabilities in the future.

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The development and characterization of carbon nanofiber/polylactic acid filament for additively manufactured piezoresistive sensors

Cited by 9 publications

References 44 publications

A stretchable flexible strain sensor with high sensitivity and fast response fabricated by embedded 3D printing of the hybrid polydimethylsiloxane/conductive carbon paste composites

A stretchable flexible strain sensor with high sensitivity and fast response fabricated by embedded 3D printing of the hybrid polydimethylsiloxane/conductive carbon paste composites

Electrospun Konjac Glucomannan/Polyvinyl Alcohol Long Polymeric Filaments Incorporated with Tea Polyphenols for Food Preservations

On the electro-magnetic properties of combined carbon nanotube and carbon-coated iron nanoparticle-modified polymer composites

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