摘要：以晶须碳纳米管（w‑CNTs）与T3碳纳米管为原料，采用真空抽滤法制备了单一结构碳纳米管薄膜（BP），包括T3‑BP、w‑BP，以及共混结构薄膜T3/w‑BP。系统考察了所得BP的结构、结晶度、导电性能与焦耳加热性能。结果表明，w‑CNTs的引入可显著提升碳纳米管复合薄膜的导电性能。其中，共混结构BP的电导率为43.9±1.09
S/cm；在6 V电压（相当于两节干电池串联）下，BP表面最高稳态温度可达212.6℃；电‑热辐射转换效率为34.36±4.1
mW/℃；且在25次焦耳加热循环测试（通电3min、断电2min）中表现出良好的热稳定性。
关键词：晶须碳管
真空抽滤 共混结构 焦耳加热
Abstract: In this paper, whisker carbon nanotubes
(w-CNTs) and T3 carbon nanotubes were used as raw materials. Single-structure
carbon nanotube films (BP), including T3-BP, w-BP, and the blended-structure
film T3/w-BP, were prepared by vacuum filtration. The structure, crystallinity,
electrical conductivity, and Joule heating performance of the obtained BPs were
systematically investigated. The results showed that the introduction of w-CNTs
could significantly improve the electrical conductivity of the carbon nanotube
composite films. Among them, the blended-structure BP exhibited a conductivity
of 43.9±1.09 S/cm. At a voltage of 6 V (equivalent to two dry batteries
connected in series), the maximum steady-state surface temperature of the BP
reached 212.6 ℃. The electrothermal radiation conversion efficiency was
34.36±4.1 mW/℃. Moreover, it showed excellent thermal stability during 25 Joule
heating cycles (3 min power-on and 2 min power-off).
Keywords:
whisker carbon nanotubes, vacuum filtration, blended structure, Joule heating
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