A low voltage, flexible, graphene-based electrothermal heater for wearable electronics and localized heating applications

Tembei, Sandra A.N.; Hessein, Amr; El-Bab, Ahmed M. R. Fath; El‐Moneim, Ahmed Abd

doi:10.1016/j.matpr.2020.05.182

Cited by 15 publications

(7 citation statements)

References 25 publications

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“…GO nanosheets were prepared by a low‐cost modified Hummers method 37,38 where typically 10 g of natural graphite powder was added to 160 ml of concentrated HNO 3. Then sonication in ultrasonic (US) bath for 20 min was carried out with stirring for 3 min.…”

Section: Methodsmentioning

confidence: 99%

Testing new graphene oxide‐coated glazing for papyrus manuscripts in museums: Part I

Deraz

El-Bab

Abdelmoneim

et al. 2021

Surface & Interface Analysis

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The display of papyrus and paper (as cellulosic materials) in the Egyptian museums is always critical due to the traditional placement of display of sensitive materials between two plates of glass, acrylic, or other types of glazing materials. The sensitivity of the glazing materials to abrasion, ultraviolet rays, dust adhesion, and high light reflectivity are considered concerning issues to conservators, curators, and visitors. In this paper, thin protective coatings of graphene oxide (GO) were synthesized by modified Hummers' method and deposited on selected museums' glazing materials (glass and acrylic) using spin coating. Multi‐analytical techniques were employed to assess the applicability of GO‐coated glazing including scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), Raman spectroscopy (RS), Fourier transform infrared spectroscopy (FTIR), microhardness testing, NIR VIS, and UV spectrophotometer and static potential measurements. The results showed that the glass glazing hardness was increased by ~10% due to the deposition of the GO coating. Moreover, according to glazing type, the reflectance values of the GO‐coated glazing samples, compared with the uncoated samples, confirmed that the thin film of GO improved the UV rays blocking. As is evident in the GO‐coated glass where approximately 27% of UV rays have been blocked, likewise, 19% of UV rays were blocked in GO‐coated acrylic (TRU VUE). Considering VIS and NIR reflection spectra of GO‐coated plexiglass, a higher reflectance is presented by 29%. Furthermore, the static potential measurements showed an energy decline in GO‐coated glazing compared with the uncoated samples.

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Section: Methodsmentioning

confidence: 99%

Testing new graphene oxide‐coated glazing for papyrus manuscripts in museums: Part I

Deraz

El-Bab

Abdelmoneim

et al. 2021

Surface & Interface Analysis

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“…Beyond the use of integrated heat-generating elements for decontamination, heat generation in wearables in general presents a promising approach, especially as functional textiles have gained increasing interest . Strategies for heated wearables have been developed using electrically conductive textiles; for example, conductive fabrics and threads can be transformed into sewable and weavable electric heaters. , Wearable heaters have also achieved localized heating through graphene-based electrothermal materials, as well as thermofluidic actuation with phase-change fluids . While promising, most of these methods have been restricted to slow response times or low temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…37 Strategies for heated wearables have been developed using electrically conductive textiles; for example, conductive fabrics and threads can be transformed into sewable and weavable electric heaters. 38,39 Wearable heaters have also achieved localized heating through graphenebased electrothermal materials, 40 as well as thermofluidic actuation with phase-change fluids. 41 While promising, most of these methods have been restricted to slow response times or low temperatures.…”

Section: ■ Introductionmentioning

confidence: 99%

Rapid In Situ Thermal Decontamination of Wearable Composite Textile Materials

Bell,

Ye,

Yap

et al. 2023

ACS Appl. Mater. Interfaces

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Pandemics stress supply lines and generate shortages of personal protective equipment (PPE), in part because most PPE is single-use and disposable, resulting in a need for constant replenishment to cope with highvolume usage. To better prepare for the next pandemic and to reduce waste associated with disposable PPE, we present a composite textile material capable of thermally decontaminating its surface via Joule heating. This material can achieve high surface temperatures (>100 °C) and inactivate viruses quickly (<5 s of heating), as evidenced experimentally with the surrogate virus HCoV-OC43 and in agreement with analytical modeling for both HCoV-OC43 and SARS-CoV-2. Furthermore, it does not require doffing because it remains relatively cool near the skin (<40 °C). The material can be easily integrated into clothing and provides a rapid, reusable, in situ decontamination method capable of reducing PPE waste and mitigating the risk of supply line disruptions in times of need.

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“…For instance, randomly oriented nanostructures fail to exhibit good mechanical properties, electrical stability and consume higher energy when used as a heating element [10]. Laserinduced reduced graphene oxide (rGO) can attain a temperature of 135 • C at a relatively high applied voltage of 9 V with 30 A current [11]. It has been seen that the steady-state temperature can be increased with applied voltage [12] which is not desirable and unsafe.…”

Section: Introductionmentioning

confidence: 99%

Realization of 3D epoxy resin/Ti₃C₂T _x MXene aerogel composites for low-voltage electrothermal heating

et al. 2021

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Suitable electrothermal materials with high heating rates at low electric power are highly desirable for de-icing and thermal management applications. Herein, 3D epoxy resin/Ti 3 C 2 T x MXene composites are synthesised and shown to be promising candidates for electrothermal heaters where the MXene serves as a nanoheater and the epoxy resin spreads the heat. A unidirectional freeze-casting technique was used to prepare an anisotropic Ti 3 C 2 T x aerogel into which epoxy resin was then vacuum infiltrated and cured. The resulting composite showed an excellent Joule heating performance over repeated heating-cooling cycles. A steady-state temperature of 123 • C was obtained by applying a low voltage of 2 V with 5.1 A current, giving a total power output of 6.1 W cm −2 . Such epoxy/MXene aerogel composites, prepared by a simple and cost-effective manner, offer a potential alternative to the traditional metal-based and nanocarbon-based electrothermal materials.

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A low voltage, flexible, graphene-based electrothermal heater for wearable electronics and localized heating applications

Cited by 15 publications

References 25 publications

Testing new graphene oxide‐coated glazing for papyrus manuscripts in museums: Part I

Testing new graphene oxide‐coated glazing for papyrus manuscripts in museums: Part I

Rapid In Situ Thermal Decontamination of Wearable Composite Textile Materials

Realization of 3D epoxy resin/Ti₃C₂T _x MXene aerogel composites for low-voltage electrothermal heating

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A low voltage, flexible, graphene-based electrothermal heater for wearable electronics and localized heating applications

Cited by 15 publications

References 25 publications

Testing new graphene oxide‐coated glazing for papyrus manuscripts in museums: Part I

Testing new graphene oxide‐coated glazing for papyrus manuscripts in museums: Part I

Rapid In Situ Thermal Decontamination of Wearable Composite Textile Materials

Realization of 3D epoxy resin/Ti3C2T x MXene aerogel composites for low-voltage electrothermal heating

Contact Info

Product

Resources

About

Realization of 3D epoxy resin/Ti₃C₂T _x MXene aerogel composites for low-voltage electrothermal heating