Interfacial polarization-induced high-k polymer dielectric film for high-performance triboelectric devices

Kim, Minsoo P.; Ahn, Chang Won; Lee, Youngsu; Kim, Kyoungho; Park, Jonghwa; Ko, Hyunhyub

doi:10.1016/j.nanoen.2020.105697

Cited by 56 publications

(41 citation statements)

References 60 publications

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“…[70,72] Therefore, highly improved dielectric properties were achieved using PANI as reinforcement material, increasing the dielectric properties without strong modifications of the electrical conductivity. Hence, the highdielectric properties [73,74] of the printable acrylates reinforced with 3.5 wt% PANI are ideal for the fabrication of sensors and flexible electronic devices.…”

Section: Electrical Propertiesmentioning

confidence: 99%

Photocurable Printed Piezocapacitive Pressure Sensor Based on an Acrylic Resin Modified with Polyaniline and Lignin

Arias-Ferreiro

Ares‐Pernas

Lasagabáster-Latorre

et al. 2022

Adv Materials Technologies

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In this context, dielectric polymeric materials are being investigated due to their scientific and technological interest since they combine dielectric properties with appropriate mechanical flexibility and simple processability. [2,3] Such composite materials show huge opportunities to be integrated in devices such as electronics, [4][5][6] sensors and actuators. [7] Within this context, additive manufacturing emerges as a set of advanced fabrication techniques that enable the production of fully functional electronic devices in one step printing. [1,[8][9][10] However, for photopolymerization-based 3D printing techniques the number of UV curable materials suitable for the fabrication of sensors and actuators is still scarce. [1] Research in this field pursues 3D printing materials with new features but also environmentally more friendly and sustainable, as demanded by today's society. [11][12][13] Techniques as stereolithography (SLA) and digital light processing (DLP) are based on the layer-by-layer solidification of a liquid photosensitive resin via UV-light exposure. [14] This is a tailorable process where multicomponent resins provide the photo-rheological and mechanical properties necessary to ensure a successful print. [15] The design of suitable materials for the manufacture of pressure sensors with high sensitivity and flexibility in wearable electronics is still a challenge. In this study, a flexible and portable pressure sensor is developed based on a photopolymeric formulation of polyaniline (PANI)/Lignin/acrylate. The amount of photoinitiator and the presence of lignin within the filler are investigated to obtain the best printability and capacitive response. Low PANI contents drastically increase the dielectric constant and 4 wt% photoinitiator improves the signal and sensitivity. A sensitivity of 0.012 kPa -1 is achieved in a linear range (0-10 kPa) with only 3.5 wt% PANI. Lignin improves both the dispersion of the filler within the matrix and the printability of the resin, due to lower absorptivity at the UV wavelength of the 3D printer. Thus, the PANI-Lignin filler is selected for the fabrication of a piezocapacitive prototype transducer. The pressure transducer demonstrate its practical application by responding to a human footfall and transmitting its corresponding electrical signal. This study shows the enhanced properties of lignin modified PANI acrylate composites. Based on lignin, an abundant natural waste, a sustainable photocurable cost-effective polymer is proposed for the fabrication of printable, wearable electronics.

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Section: Electrical Propertiesmentioning

confidence: 99%

Photocurable Printed Piezocapacitive Pressure Sensor Based on an Acrylic Resin Modified with Polyaniline and Lignin

Arias-Ferreiro

Ares‐Pernas

Lasagabáster-Latorre

et al. 2022

Adv Materials Technologies

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“…S5d-f †), which is caused by higher separation velocity than the contact velocity. 31,58 After all, the iFBCP-PHU shows the highest triboelectric power at 40 MΩ (0.37 μW cm −2 and 3.78 μW cm −2 during contact and separation process under 10 N, respectively). Moreover, the iFBCP-PHU shows long-term stability over 2000 cycles (Fig.…”

Section: Polymer Chemistry Papermentioning

confidence: 99%

Self-healable triboelectric nanogenerators based on ionic poly(hindered urea) network materials cross-linked with fluorinated block copolymers

et al. 2022

Self Cite

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“…There are five kinds of phases in PVDF: α, β, γ, δ, and ε . Among these, β-phase has a great trend of spontaneous polarization and possesses excellent piezoelectricity and ferroelectricity as well as a high dielectric constant, contributing to great potential for applications in plentiful areas, such as optics, energy storage devices, sensors, wearable devices, and so on. − However, ferroelectric polymers are still facing great challenges in energy storage applications due to the large energy loss resulting from the ferroelectric domain switching. , These facts make PVDF-based polymers one of the most popular dielectric materials and raise a wide range of concerns.…”

Section: Introductionmentioning

confidence: 99%

Significantly Improved Dielectric Breakdown Strength and Energy Density in P(VDF-TrFE-CTFE) Polymer via a Facile Uniaxial Drawing Process

Jiang

Wang

et al. 2022

ACS Appl. Polym. Mater.

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In the past decade, poly(vinylidenefluoride) (PVDF)-based polymers have attracted increasing attention in energy storage applications due to the advantages of high breakdown strength, flexibility, processability, and low cost. Compared with the PVDF homopolymer and binary copolymer, terpolymer poly(vinylidenefluoride-trifluoroethylene-chlorotrifluoroethylene) (P(VDF-TrFE-CTFE)) possesses higher permittivity due to a strong polar group and its relaxor characteristic. However, its breakdown strength is limited due to the premature saturated polarization and low Young’s modulus. In this work, a facile drawing strategy has been employed to overcome this problem. With the increase in the stretching ratio from 0 to 10, the crystalline grain size is declined from 8.9 to 6.7 nm with the increase in crystallinity, all of which are favorable to improving the breakdown strength and energy storage density, and α/γ-phase tends to transform to β-phase as well. It turns out that the optimal property could be obtained with the stretching ratio of 6, where the breakdown strength could reach 620 kV/mm and a discharge energy density could reach up to 18.3 J/cm3. The optimized performance is significantly larger than that of the original terpolymer P(VDF-TrFE-CTFE) with breakdown strength and energy density of 280 kV/mm and 6.9 J/cm3, respectively. This work demonstrates that the uniaxial drawing is an effective strategy to improve the performance of P(VDF-TrFE-CTFE).

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Interfacial polarization-induced high-k polymer dielectric film for high-performance triboelectric devices

Cited by 56 publications

References 60 publications

Photocurable Printed Piezocapacitive Pressure Sensor Based on an Acrylic Resin Modified with Polyaniline and Lignin

Photocurable Printed Piezocapacitive Pressure Sensor Based on an Acrylic Resin Modified with Polyaniline and Lignin

Self-healable triboelectric nanogenerators based on ionic poly(hindered urea) network materials cross-linked with fluorinated block copolymers

Significantly Improved Dielectric Breakdown Strength and Energy Density in P(VDF-TrFE-CTFE) Polymer via a Facile Uniaxial Drawing Process

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