Scalable manufacturing of fibrous nanocomposites for multifunctional liquid sensing

Goodman, Sheila M.; Tortajada, Ignacio Asensi; Haslbeck, Florian; Oyulmaz, Kaan Yüksel; Rummler, A.; Sánchez, Carlos Solans; País, José Torres; Denizli, H.; Haunreiter, Kurt J.; Dichiara, Anthony B.

doi:10.1016/j.nantod.2021.101270

Cited by 8 publications

(9 citation statements)

References 34 publications

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“…These initial trends were followed by a secondary increase at a slower rate both in diameter and resistance for the filaments prepared under an applied voltage of 100 V pp . These observations are consistent with the swelling behavior of other cellulosic materials, which are commonly understood to demonstrate two distinct swelling phases when immersed in water: an initial short but fast phase where the swelling rate reaches a maximum, followed by a longer and slower phase where the swelling rate approaches zero . For the filaments produced in the absence of electric field, a plateau was reached rapidly after the initial linear response, which might be attributed to the lower ordering degree of these samples.…”

Section: Resultssupporting

confidence: 87%

“…Despite similar hydroexpansion characteristics, the filaments prepared at an applied voltage of 100 V pp showed more than 2 times greater sensitivity compared to those fabricated in the absence of electric field. The improved nanoparticle orientation in this material enabled a record sensitivity of 800% after being wetted with only 1 μL for 2 min, which is nearly five times higher than our previously reported ultrasensitive paper sensors under similar wetting conditions . Although benchmarking the liquid-sensing performance is quite challenging due to the varying experimental conditions ( i.e.…”

Section: Resultsmentioning

confidence: 89%

“…These observations are consistent with the swelling behavior of other cellulosic materials, which are commonly understood to demonstrate two distinct swelling phases when immersed in water: an initial short but fast phase where the swelling rate reaches a maximum, followed by a longer and slower phase where the swelling rate approaches zero. 52 For the filaments produced in the absence of electric field, a plateau was reached rapidly after the initial linear response, which might be attributed to the lower ordering degree of these samples. All filaments exhibited a maximum augmentation in their relative diameter of approximately 80% (Figure 8B) with a swelling rate of 60%•s −1 (Figure 8C) regardless of the voltage applied.…”

Section: Structural Characterization Of Filament Nanocomposites Unles...mentioning

confidence: 90%

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Dynamic Assembly of Strong and Conductive Carbon Nanotube/Nanocellulose Composite Filaments and Their Application in Resistive Liquid Sensing

Wise

Takana

Dichiara

2023

ACS Appl. Mater. Interfaces

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The continuous flow assembly of colloidal nanoparticles from aqueous suspensions into macroscopic materials in a field-assisted double flow focusing system offers an attractive way to bridge the outstanding nanoscale characteristics of renewable cellulose nanofibrils (CNFs) at scales most common to human technologies. By incorporating single-walled carbon nanotubes (SWNTs) during the fabrication process, high-performance functional filament nanocomposites were produced. CNFs and SWNTs were first dispersed in water without any external surfactants or binding agents, and the resulting nanocolloids were aligned by means of an alternating electric field combined with extensional sheath flows. The nanoscale orientational anisotropy was then locked by a liquid–gel transition during the materials assembly into macroscopic filaments, which greatly improved their mechanical, electrical, and liquid sensing properties. Significantly, these findings pave the way toward the environmentally friendly and scalable manufacturing of a variety of multifunctional fibers for diverse applications.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 89%

Section: Structural Characterization Of Filament Nanocomposites Unles...mentioning

confidence: 90%

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Dynamic Assembly of Strong and Conductive Carbon Nanotube/Nanocellulose Composite Filaments and Their Application in Resistive Liquid Sensing

Wise

Takana

Dichiara

2023

ACS Appl. Mater. Interfaces

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“…Composites based on carbon nanotubes or graphene and cellulose have been reported for, among other things, humidity and vapor sensing, as electromagnetic shielding, and as thermoelectric material [ 32 – 38 ]. Also, Qi et al reported a liquid-water sensor based on carbon nanotube–cellulose composite films, and, more recently, Goodman et al reported the scalable manufacturing of nanocomposites for liquid sensing [ 39 – 40 ]. Besides, graphene films deposited on cellulose paper and a graphene/cellulose composite were also reported as a solvent sensor material [ 30 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotube-cellulose ink for rapid solvent identification

Amarante¹,

Cunha²,

Laudares³

et al. 2023

Beilstein J. Nanotechnol.

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In this work, a conductive ink based on microfibrillated cellulose (MFC) and multiwalled carbon nanotubes (MWCNTs) was used to produce transducers for rapid liquid identification. The transducers are simple resistive devices that can be easily fabricated by scalable printing techniques. We monitored the electrical response due to the interaction between a given liquid with the carbon nanotube–cellulose film over time. Using principal component analysis of the electrical response, we were able to extract robust data to differentiate between the liquids. We show that the proposed liquid sensor can classify different liquids, including organic solvents (acetone, chloroform, and different alcohols) and is also able to differentiate low concentrations of glycerin in water (10–100 ppm). We have also investigated the influence of two important properties of the liquids, namely dielectric constant and vapor pressure, on the transduction of the MFC-MWCNT sensors. These results were corroborated by independent heat flow measurements (thermogravimetric analysis). The proposed MFC-MWCNT sensor platform may help paving the way to rapid, inexpensive, and robust liquid analysis and identification.

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“…A carbon nanotube paper composite (CPC) is one of the auxetic materials. In these composites, CNTs deliver electrical conductivity, while cellulose fibers offer the structural frame [18]. Since cellulose fibers are the structural component of a composite, the deformation of cellulose fibers contributes to the auxetic behavior under stretching.…”

Section: Introductionmentioning

confidence: 99%

Humidity response of a capacitive sensor based on auxeticity of carbon nanotube-paper composites

Qian

Sakthivelpathi

et al. 2022

Nano Ex.

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Auxetic materials showing a negative Poisson’s ratio can offer unusual sensing capabilities due to drastic percolation changes. This study presents the capacitive response of wet-fractured carbon nanotube paper composites in exposure to humidity. A strained composite strip is fractured to produce numerous cantilevers consisting of cellulose fibers coated with carbon nanotubes. During stretching, the thin composite buckles in the out-of-plane direction, which causes auxetic behavior to generate the radially structured electrodes. The crossbar junctions forming among the fractured electrodes significantly increase capacitance and its response to humidity as a function of sensor widths. The molecular junctions switch electric characteristics between predominantly resistive- and capacitive elements. The resulting capacitive response is characterized for humidity sensing without the need for an additional absorption medium. The normalized capacitance change (ΔC/C) exhibits a sensitivity of 0.225 within the range of 40~80 % relative humidity. The novel auxetic behavior of a water-printed paper-based nanocomposite paves the way for inexpensive humidity and sweat sensors.

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Scalable manufacturing of fibrous nanocomposites for multifunctional liquid sensing

Cited by 8 publications

References 34 publications

Dynamic Assembly of Strong and Conductive Carbon Nanotube/Nanocellulose Composite Filaments and Their Application in Resistive Liquid Sensing

Dynamic Assembly of Strong and Conductive Carbon Nanotube/Nanocellulose Composite Filaments and Their Application in Resistive Liquid Sensing

Carbon nanotube-cellulose ink for rapid solvent identification

Humidity response of a capacitive sensor based on auxeticity of carbon nanotube-paper composites

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