Multifunctional non-woven fabrics of interfused graphene fibres

Abstract

Carbon-based fibres hold promise for preparing multifunctional fabrics with electrical conductivity, thermal conductivity, permeability, flexibility and lightweight. However, these fabrics are of limited performance mainly because of the weak interaction between fibres. Here we report non-woven graphene fibre fabrics composed of randomly oriented and interfused graphene fibres with strong interfibre bonding. The all-graphene fabrics obtained through a wet-fusing assembly approach are porous and lightweight, showing high in-plane electrical conductivity up to ∼2.8 × 104 S m−1 and prominent thermal conductivity of ∼301.5 W m−1 K−1. Given the low density (0.22 g cm−3), their specific electrical and thermal conductivities set new records for carbon-based papers/fabrics and even surpass those of individual graphene fibres. The as-prepared fabrics are further used as ultrafast responding electrothermal heaters and durable oil-adsorbing felts, demonstrating their great potential as high-performance and multifunctional fabrics in real-world applications.

Spider‐Web‐Inspired PM0.3 Filters Based on Self‐Sustained Electrostatic Nanostructured Networks

“…This change was due to their integrated features of nanoscale diameters, interlinked networks, and a net-bonding effect, which brought rapid stress dissipation paths. [31,32] To demonstrate the self-sustained electrostatic property of our SWING filters, a simple nanogenerator consist of PVDF NF-net filter and Cu meshes was created (Figure 3h). This NF-net based nanogenerator, as a wind energy harvester, was driven by aeolian vibration, and enabled a high output voltage of 8.3 V under an exerted wind pressure of 150 Pa due to its increased β-phase content (airflow velocity of 5 m s −1 ; Figure 3i).…”

2D Crystal–Based Fibers: Status and Challenges

“…When the input power is 4.95 W cm −2 (10 V), the heating rate reaches 1776.8 °C s −1 , while the peak cooling‐down rate is 1100 °C s −1 . Moreover, the device can adjust the temperature in a large temperature range (30–380 °C) at a low operating voltage (less than 10 V) . In the following year, they made graphene fiber heaters through twist‐spinning of thermally annealed graphene films, as shown in Figure .…”

Rapid production of large-area, transparent and stretchable electrodes using metal nanofibers as wirelessly operated wearable heaters

“…9 In addition, the low thermal conductivity of ITO can lead to slow heating and cooling rates. 10 Because of these disadvantages of ITO, the use of low-dimensional and stretchable conductive materials, such as graphene, [11][12][13] CNTs, 14,15 metal nanowires (mNWs) 7,[16][17][18] and serpentine patterns of metal films, 19,20 has been studied extensively in the search for stretchable heaters. However, carbon-based, transparent heaters require high operation voltages because of their relatively high R s values without doping (4~250 Ω per sq), which can degrade their power efficiency.…”