Flexible high dielectric thin films based on cellulose nanofibrils and acid oxidized multi-walled carbon nanotubes

Tao, Jie; Cao, Shun‐an

doi:10.1039/c9ra10915c

Cited by 35 publications

(13 citation statements)

References 52 publications

(54 reference statements)

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“…To show the LED pattern, the 5 × 5 LEDs were repeatedly activated using the Arduino board by applying 2.5 V at 20 Hz. Although the operation process of a two-layer LED display is more complex than that of a single layer one, which applies an individual voltage, the two-layer 5 × 5 LED display has a simpler circuit. Figure h shows the transparency of the 5 × 5 LED display using double layer MC substrates for the LED operation.…”

Section: Resultsmentioning

confidence: 99%

Double Layer Methylcellulose Substrate-Based Wearable Touch Sensor and Display for Communication

Kim

Chang

Song

2022

ACS Appl. Electron. Mater.

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In recent years, flexible printed circuit boards (FPCBs) with polyimide substrates have been widely used in electronic devices for industrial and academic research owing to their light weight, high dielectric constant, and flexibility. However, these FPCBs have a critical limitation of recycling, as polyimide is not degradable or eco-friendly. To overcome this issue, we fabricated cellulose-based FPCBs. A transparent and flexible methyl cellulose-based substrate was produced through a simple solvent evaporation process. The interconnect electrode was fabricated with a pattern of Ag/carbon nanotube composite by using a stencil mask. The methyl cellulose-based FPCBs were evaluated for diverse mechanical stresses such as bending, torsional, and tensile stresses. In addition, their surface morphology was analyzed using optical microscopy and scanning electron microscopy. For the electrical properties, in addition to the current–voltage curves, their dielectric properties were analyzed. Finally, we reported the successful wearable communication device of the cellulose-based FPCBs in a 5 × 5 touch panel and a 5 × 5 light-emitting diode display.

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Section: Resultsmentioning

confidence: 99%

Double Layer Methylcellulose Substrate-Based Wearable Touch Sensor and Display for Communication

Kim

Chang

Song

2022

ACS Appl. Electron. Mater.

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“…Hence, we cannot calculate the d 33 of CNF lms in the same way as for P(VDF-TrFE). Instead, previously reported dielectric constant of cellulose (ε r =10) [39][40][41] are used to calculate the piezoelectric coe cient of the CNF devices. As shown in Fig.…”

Section: Piezoelectric Device Performancementioning

confidence: 99%

Remarkable piezoelectric properties in thin films of cellulose nanofibers after electrochemical poling

Sultana

Alam

Pavlopoulou

et al. 2021

Preprint

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Internet-of-everything (IoE) is defined as networked connections of things, people, data and processes. IoE nodes, preferably shaped as printed flexible systems, serves as the frontier outpost of the Internet and comprises devices to record and regulate states and functions. To power distributed IoE nodes in an ecofriendly manner, technology to scavenge energy from ambience and self-powered devices are developed. For this, piezoelectricity is regarded as a key-property, however current technology typically based on polyvinylidene difluoride (PVDF) co-polymers, are expensive and produced via toxic protocols. We report piezoelectric characteristics of electrochemically poled cellulose nanofiber (CNFs) thin films processed from water dispersions. Poling these films at humid conditions cause breaking and reorientation of CNF segments, which results in enhanced crystal alignment rendering the resulting material piezoelectric. Generators based on poled CNF show similar piezoelectric voltage and coefficient, here measured to d33 = 46 pm/V, as for devices including PVDF copolymer layers of similar thickness. Our findings promise for low cost and printable ecofriendly piezoelectric-powered IoE nodes.

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“…24 As nano conductive llers with a high aspect ratio, MWCNTs are one of the ideal llers for the preparation of high-performance composite materials with excellent mechanical and dielectric properties. 25,26 In past work, MWCNTs were incorporated into PVDF to make composite materials with high dielectric properties 27 or used to decorate ultrahigh molecular weight polyethylene powder particles to produce electrically conductive porous ltration membranes. 28 However, the dielectric loss would be extremely high because MWCNTs are highly prone to be agglomerated which leads to the formation of conductive pathways in the matrix.…”

Section: Introductionmentioning

confidence: 99%

Structural evolution and dielectric properties of biaxially oriented polyethylene/multiwalled carbon nanotube composite films

Shi

Feng

et al. 2021

RSC Adv.

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Flexible high dielectric thin films based on cellulose nanofibrils and acid oxidized multi-walled carbon nanotubes

Abstract: The acid oxidized MWCNTs have excellent dispersity in CNF, resulting in outstanding dielectric properties of the flexible CNF/o-MWCNT nanocomposite films.

Cited by 35 publications

References 52 publications

Double Layer Methylcellulose Substrate-Based Wearable Touch Sensor and Display for Communication

Double Layer Methylcellulose Substrate-Based Wearable Touch Sensor and Display for Communication

Remarkable piezoelectric properties in thin films of cellulose nanofibers after electrochemical poling

Structural evolution and dielectric properties of biaxially oriented polyethylene/multiwalled carbon nanotube composite films

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