Flexible transparent conductive heater using multiwalled carbon nanotube sheet

Abstract

High strain biocompatible polydimethylsiloxane-based conductive graphene and multiwalled carbon nanotube nanocomposite strain sensors Appl. Phys. Lett. 102, 183511 (2013); 10.1063/1.4804580Graphene wrapped multiwalled carbon nanotubes dispersed nanofluids for heat transfer applications This paper reports highly flexible, transparent, conducting heaters based on multiwalled carbon nanotube (MWCNT) sheets. The MWCNT sheets were spun directly from a well-aligned MWCNT forest. The fabrication of the MWCNT sheet heater was quite simple and suitable for mass production, requiring only a one-step transferring process, in which the MWCNT sheet is drawn onto the target substrates. This study examined the parameters that affect the heat generation of the MWCNT sheet-based heater; input power, surface area, and thermal conductivity of the substrate. In particular, more effort was focused on how to increase the surface area and contact points between the individual MWCNTs; simple acid treatment and added metal nanoparticles increased the heat performance of the heater dramatically. Moreover, the heaters exhibited durability and flexibility against many bending cycles. Therefore, the MWCNT sheet-based heater can be used for versatile applications requiring transparency, conduction, and flexibility.

Towards low cost materials and methods for transparent electrodes

“…On the other side, ITO synthesized by sol-gel process is cost effective [81]. The process cost is minimal for Cu nanowires (Reprinted with permission from [ [78] and graphene [20] are also compared.…”

Aligned Carbon Nanotube Film Enables Thermally Induced State Transformations in Layered Polymeric Materials

“…4 This can be achieved using microheater films. Using nanoscale elements, such as carbon nanotubes (CNTs), [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] graphene, 10,[20][21][22][23] metal nanowires (NWs), 19,[24][25][26][27][28][29][30][31] or hybrids of thereof, 24,32 recent work has shown that microheater films with high operating temperatures and fast thermal ramp rates can be made. However, the lack of CNT/graphene/NW alignment in these microheater films compromises their mechanical properties and electrical stability, 32 making them less suitable for application in structures that may be exposed to stress, such as airplane wings.…”

Flexible Low-Voltage Carbon Nanotube Heaters and their Applications

“…The heat generated by the CNT heater, when connected to a power source, is lost into the ambient environment during heating. The total heat is dissipated into the air and substrate through three mechanisms: conduction, convection and radiation [12].…”

“…It has been shown that CNT arrays can be processed into yarns and sheets, which have excellent properties [6][7][8][9][10][11]. One of the newer applications of CNT sheets is their use as a heating material [12][13][14][15][16][17]. The resistivity of CNT films can be controlled by the number of layers within the sheet or by the reagents used for their densification [17,18].…”

“…CNT-based heaters have also found applications as efficient and durable electrodes for Faradaic water splitting [22]. CNT sheet heaters have been fabricated as transparent film heaters, due to their high transmittance and good heating capabilities [12,[15][16][17]. CNT heaters have also demonstrated to be more efficient than commercial heating materials such as nichrome [18,23].…”