Enhancement of electrothermal performance in single-walled carbon nanotube transparent heaters by room temperature post treatment

Shobin, Loukkose Rosemary; Manivannan, S.

doi:10.1016/j.solmat.2017.09.041

Cited by 42 publications

(23 citation statements)

References 38 publications

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“…Figure a presents the average steady-state temperature of the integrated GF-SWCNT heaters, which were found to respond almost linearly to the applied external V bias . This is in agreement with previous studies related to electrothermal devices. ,, Linear behavior with respect to V bias is a prerequisite for the reliable function of the device and indicates good operation within the tested limits.…”

Section: Results and Discussionmentioning

confidence: 98%

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Printed Single-Wall Carbon Nanotube-Based Joule Heating Devices Integrated as Functional Laminae in Advanced Composites

Karalis

Tzounis

Dimos

et al. 2021

ACS Appl. Mater. Interfaces

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This work reports the design and fabrication of novel printed single-wall carbon nanotube (SWCNT) electrothermal Joule heating devices. The devices are directly deposited on unidirectional (UD) glass fiber (GF) fabrics. The GF-SWCNT Joule heaters were integrated during manufacturing as "system" plies in carbon fiber reinforced polymer (CFRP) composite laminates. Specific secondary functions were imparted on the composite laminate endowing thus a multifunctional character. The efficient out-of-oven curing (OOC) of a CFRP laminate was demonstrated using a sandwich configuration comprising top/bottom GF-SWCNT system plies. A total power consumption of ca. 10.5 kWh for the efficient polymerization of the thermoset matrix was required. Infrared thermography (IR-T) monitoring showed a uniform and stable temperature field before and after impregnation with epoxy resin. Quasi-static three-point bending and dynamic mechanical analysis (DMA) revealed a minor knock-down effect of the OOC−CFRP laminates properties compared to oven cured CFRPs, whereas the glass transition temperature (T g ) was almost identical. The OOC−CFRP laminates were efficient in providing additional functions such as deicing and self-sensing that are highly sought in the energy and transport sectors, i.e., wind turbine blades or aircraft wings. The novel modular design provides unique opportunities for large-area applications via multiple interconnected arrays of printed devices.

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Section: Results and Discussionmentioning

confidence: 98%

“…This is in agreement with previous studies related to electrothermal devices. 3,35,64 Linear behavior with respect to V bias is a prerequisite for the reliable function of the device and indicates good operation within the tested limits.…”

Section: Methodsmentioning

confidence: 99%

Printed Single-Wall Carbon Nanotube-Based Joule Heating Devices Integrated as Functional Laminae in Advanced Composites

Karalis

Tzounis

Dimos

et al. 2021

ACS Appl. Mater. Interfaces

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“…In the cooling region, after the applied voltage had been turned off, the temperature of the CMs cooled down to room temperature within 2 min. The 102 nm thick CMs with a transmittance of 80% showed a T max of 116 °C with a heating rate of 8.78 °C s −1 at an applied voltage of 60 V, which is comparable to that of electric heating films prepared with carbon nanomaterials, as summarized in Table . As shown in Figure , there were no noticeable changes in the T max and response time at an applied voltage of 60 V for 10 days, indicating high operational durability of the prepared heaters.…”

Section: Resultsmentioning

confidence: 99%

Transparent Electric Heaters Based on Photoresist‐Derived Carbon Micropatterns on Quartz Plates

Lee

Hui-Gyun

Choi

et al. 2018

Macro Materials & Eng

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In this study, transparent electric heaters (TEHs) are developed based on photoresist‐derived carbon micropatterns (CMs). Well‐defined SU‐8 micropatterns formed by deep UV lithography are carbonized in a tube furnace under an inert atmosphere. The resulting CMs are found to have pseudo‐graphitic structures containing both graphitic and disordered structures. The optical transmittance and electrical conductivity of the CMs increase as their thickness increases. The 102 nm thick CMs exhibit a good transmittance of 78% at 550 nm and a high electrical conductivity of 2.51 × 102 S cm−1. As TEHs, the 102 nm thick CMs demonstrate a maximum temperature of 116 °C with a maximum heating rate of 8.78 °C s−1 at an applied voltage of 60 V and a low electricity consumption of 1.02 W cm−2, which are comparable to the electric heating performance of TEHs prepared with carbon nanomaterials. Therefore, the CMs fabricated in this study can be utilized as electrodes for TEHs in various medical, industrial, consumer, and automobile applications.

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“…In particular, eco-friend and energy efficient smart windows combined with the Internet of Things to communicate with human indoors are required for next-generation smart buildings and automobiles. Because the portion of windows in recent buildings and automobiles has rapidly increased, the development of multi-functional smart windows critically influences the environment of building and automobile interiors 8,9 .Among several functions of the smart windows, the transparent thin film heater (TTFH) to remove frost and ice on the surface of window is very important 10,11 . In particular, the TTFHs require hydrophobic surface for the self-cleaning of the smart window, and good flexibility for the curved surface of windows.…”

Section: Introductionmentioning

confidence: 99%

Self-cleanable, waterproof, transparent, and flexible Ag networks covered by hydrophobic polytetrafluoroethylene for multi-functional flexible thin film heaters

Lee

Kim

2019

Sci Rep

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We demonstrate a self-cleanable, waterproof, highly transparent, and flexible Ag network covered by a very thin transparent polytetrafluoroethylene (PTFE) layer using typical magnetron sputtering for multi-functional flexible thin film heaters used in smart windows. By passivation of the self-assembled Ag network with very thin PTFE films, we fabricated a multi-functional Ag network suitable for flexible thin film heaters. At a PTFE thickness of 10 nm, the Ag network passivated by hydrophobic PTFE layer showed a low sheet resistance of 11.64 Ohm/square, high optical transmittance of 80.20% at a wavelength of 550 nm, and high contact angle of 102.42°. In addition, sputtering of the PTFE layer on the Ag network improved the mechanical flexibility and reliability of the Ag network electrode. The flexible and transparent thin film heater (TTFH) with Ag network electrode covered by PTFE layer showed a saturation temperature of 120 °C at low voltage of 4.5 V and power of 2.45 W, as well as a hydrophobic surface suited for self-cleaning smart windows. These multi-functional performances of TTFH indicate that the Ag network/PTFE film-based flexible TTFH could be used as self-cleanable, waterproof TTFHs for curved smart windows in smart buildings and automobiles.

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Enhancement of electrothermal performance in single-walled carbon nanotube transparent heaters by room temperature post treatment

Cited by 42 publications

References 38 publications

Printed Single-Wall Carbon Nanotube-Based Joule Heating Devices Integrated as Functional Laminae in Advanced Composites

Printed Single-Wall Carbon Nanotube-Based Joule Heating Devices Integrated as Functional Laminae in Advanced Composites

Transparent Electric Heaters Based on Photoresist‐Derived Carbon Micropatterns on Quartz Plates

Self-cleanable, waterproof, transparent, and flexible Ag networks covered by hydrophobic polytetrafluoroethylene for multi-functional flexible thin film heaters

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