Abstract
High-performance, flexible film heaters with carbon nanotube transparent conducting films are easily fabricated by both a rod-coating method and a spraying method. The main conclusion we have reached is that the film demonstrates a heating rate of 6.1°C s−1 at 35 V and sheet resistance as low as 94.7 sq−1 with 72.04% optical transmittance at a wavelength of 550 nm by the spraying method after a series of post-treatment processes with acid and distilled water. Then, we adopt a mathematical method of nonlinear fitting to simulate the collected experimental data and the functions effectively. Furthermore, through analysis of the formula, the correlation between temperature and time is well explained. Therefore, carbon nanotube-based, flexible, transparent heaters exhibit high electrothermal performance and are expected to find different applications, e.g. various functional devices such as heating materials, heatable smart windows or dining tables.
Highlights
With exceptional properties [1], carbon nanotubes (CNTs) attract a wide range of applications, including transparent conducting films (TCFs) [2], organic light-emitting diodes [3], composites [4], energy-related systems [5] and sensors [6]
The distribution states of the SWCNT networks by different post-processing methods are compared in figure 1
We have fabricated SWCNT-based flexible transparent film heaters with excellent heating performance through spray coating on a poly(ethylene terephthalate) (PET) substrate
Summary
With exceptional properties [1], carbon nanotubes (CNTs) attract a wide range of applications, including transparent conducting films (TCFs) [2], organic light-emitting diodes [3], composites [4], energy-related systems [5] and sensors [6]. Conductivity of CNT films provides a fast heating rate and a homogeneous temperature distribution 2 with excellent optical transparency [7,8,9]. Indium tin oxide (ITO) is widely used to prepare transparent heating films because it is optically transparent to visible wavelengths and has high electrical conductivity [15,16]. A number of different of nanomaterials, such as CNTs [19] and graphene [20], are flexible and low cost, which makes them better materials for flexible electronics
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