High Efficiency Electrothermal Graphene/Tourmaline Composite Fabric Joule Heater with Durable Abrasion Resistance via a Spray Coating Route

Abstract

Durable abrasion resistance is the critical capability for the functional textile via coating treatment routes. Here, an abrasion resistant fabric-based Joule heater with sandwich structure was fabricated via spraying in sequence of water-soluble polyurethane (WPU), then composite ink of graphene, WPU and tourmaline, and at last WPU. The composite fabrics with the incorporation of tourmaline exhibited favorable electrothermal performance, which could achieve a steady-state temperature of 75.4 °C in 30 s under 10 V voltage, and possessed a high power density (2 × 10 3 W/m 2 ). The flexible heater exhibited remarkable abrasion shielding performance, only resulting in 21.1% electrical conductivity reduction after a 2500-cycles abrasion test, far less than the 87.0% of fabrics without a sandwich structure. The application on thermal therapy of the hand exhibited 1.8 °C rise of blood vessel around the heater under 8 V voltage. Therefore, the asobtained Joule heater can be widely applied in functional protective garments and medical electroheating wearable devices.

Multiscale Disordered Porous Fibers for Self-Sensing and Self-Cooling Integrated Smart Sportswear

“…Graphene (G) was prepared from the purified natural graphite by the modified Hummer's method described previously. [30][31][32][33] For preparing MPPU fibers, a poly (methyl methacrylate) (PMMA) plate with slit channel was fabricated using standard micro carving methods (Figure S1a) and sealed with another intact PMMA plate. The three inlet channels have a square cross-section (side length: h=300 μm), whereas the cross-section of coaxial channel is rectangle (side length: h=300 μm, w=600 μm), as seen in Figure S1b.…”

Stretchable and Designable Textile Pattern Strain Sensors Based on Graphene Decorated Conductive Nylon Filaments

“…The conductive inks were first prepared according to the procedures in our previous work . Amount of graphene slurry (GR) was added to waterborne polyurethane followed by further vigorous stirring under the room temperature for 1 h until a homogeneous dispersion achieved.…”

Soft bimorph actuator with real-time multiplex motion perception

“…It takes only approximately 10 s to heat up to the steady temperature (168°C at 12 V) or to cool to room temperature (13.56°C/s), which is much faster than the graphenebased heater in our previous reports. [41][42][43] This excellent electrothermal effect benefits from the low resistance and high electrothermal conversion performance of MXene. [44,45] In addition, with 10 V as an example, margin deterioration in the electrothermal performance of the ETSA is observed in 20 cycles (Fig.…”