Conventional adhesives show a decrease in the adhesion force with increasing temperature due to thermally induced viscoelastic thinning and/or structural decomposition. Here, we report the counter-intuitive behaviour of carbon nanotube (CNT) dry adhesives that show a temperature-enhanced adhesion strength by over six-fold up to 143 N cm−2 (4 mm × 4 mm), among the strongest pure CNT dry adhesives, over a temperature range from −196 to 1,000 °C. This unusual adhesion behaviour leads to temperature-enhanced electrical and thermal transports, enabling the CNT dry adhesive for efficient electrical and thermal management when being used as a conductive double-sided sticky tape. With its intrinsic thermal stability, our CNT adhesive sustains many temperature transition cycles over a wide operation temperature range. We discover that a ‘nano-interlock' adhesion mechanism is responsible for the adhesion behaviour, which could be applied to the development of various dry CNT adhesives with novel features.
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机译：常规的粘合剂由于热诱导的粘弹性变薄和/或结构分解而显示出随着温度升高粘合力降低。在这里，我们报告了碳纳米管（CNT）干胶的违反直觉的行为，该胶粘剂的温度增强后的粘合强度提高了六倍，达到143 N cm -2 （4 mm×4 mm ），在最强的纯CNT干胶中，温度范围为-196至1,000C。这种不寻常的粘合行为会导致温度和电传递的温度升高，从而使CNT干胶在用作导电双面胶时可实现有效的电和热管理。凭借其固有的热稳定性，我们的CNT粘合剂可在较宽的工作温度范围内维持许多温度转变周期。我们发现，“纳米联锁”粘合机制是造成粘合行为的原因，它可用于开发具有新颖功能的各种干式CNT粘合剂。
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