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Poly(octadecyl acrylate)-Grafted Multiwalled Carbon Nanotube Composites for Wearable Temperature Sensors
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-01-28 , DOI: 10.1021/acsanm.9b02396 Alexander J. Wang 1, 2 , Surendra Maharjan 1, 2 , Kang-Shyang Liao 1, 2 , Brian P. McElhenny 2, 3 , Kourtney D. Wright 4 , Eoghan P. Dillon 5 , Ram Neupane 6 , Zhuan Zhu 7 , Shuo Chen 2, 3 , Andrew R. Barron 4, 8 , Oomman K. Varghese 6 , Jiming Bao 7 , Seamus A. Curran 1, 2
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-01-28 , DOI: 10.1021/acsanm.9b02396 Alexander J. Wang 1, 2 , Surendra Maharjan 1, 2 , Kang-Shyang Liao 1, 2 , Brian P. McElhenny 2, 3 , Kourtney D. Wright 4 , Eoghan P. Dillon 5 , Ram Neupane 6 , Zhuan Zhu 7 , Shuo Chen 2, 3 , Andrew R. Barron 4, 8 , Oomman K. Varghese 6 , Jiming Bao 7 , Seamus A. Curran 1, 2
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Nanocarbon-based disordered, conductive, polymeric nanocomposite materials (DCPNs) are increasingly being adopted in applications across the breadth of materials science. DCPNs characteristically exhibit poor electroconductive properties and irreproducibility/irreversibility in electronic phenomena, due largely to the percolative disordered nature intrinsic to such systems. The authors herein present an alternative approach toward enhancing the thermoresponsivity, repeatability, and reversibility of nanocarbon-based DCPNs in thermometric applications. This is empirically demonstrated using poly(octadecyl acrylate)-grafted-multiwall carbon nanotubes (PODA-g-MWCNTs) synthesized via reversible addition–fragmentation chain-transfer (RAFT) polymerization. Synthesized PODA-g-MWCNTs exhibit repeatable, near-pyrexia sensitized, switch-like electronic responses across subtle glass transitions characterized by an exceptionally large positive temperature coefficient of resistance values of 7496.53% K–1 ± 3950.58% K–1 at 315.1 K (42.0 °C). This corresponds to a sizable transition rate of 17.39 kΩ K–1 ± 0.49 kΩ K–1, and recoverable near room temperature resistance values of 246.17 Ω ± 12.19 Ω at 298.2 K (25.1 °C). Near-human body temperature sensitized PODA-g-MWCNTs assembled in this work are promising candidates for wearable temperature sensors and other thermometric applications.
中文翻译：
耐磨温度传感器用聚丙烯酸十八烷基酯接枝的多壁碳纳米管复合材料
基于纳米碳的无序，导电，聚合物纳米复合材料（DCPNs）在材料科学的广泛应用中越来越多地被采用。DCPN的特征是在电子现象中表现出较差的导电性和不可复制性/不可逆性，这在很大程度上是由于此类系统固有的渗透性无序特性。本文的作者提出了在测温应用中增强纳米碳基DCPNs的热响应性，可重复性和可逆性的替代方法。通过可逆加成-断裂链转移（RAFT）聚合合成的聚（丙烯酸十八烷基酯）-接枝-多壁碳纳米管（PODA- g- MWCNT）经验性地证明了这一点。合成PODA- g-MWCNT在微妙的玻璃化转变过程中表现出可重复的，近乎热敏化的，类似开关的电子响应，其特征是在315.1 K（42.0°C）下，电阻值的正温度系数非常大，为7496.53％K –1 ±3950.58％K –1。这对应于17.39kΩ的K的相当大的转变速率-1 ±0.49千欧ķ -1在298.2 K（25.1℃），且可恢复接近室温电阻值246.17Ω±12.19Ω的。这项工作中组装的接近人体温度敏感的PODA- g -MWCNT是可穿戴温度传感器和其他测温应用的有希望的候选者。
更新日期：2020-01-28
中文翻译：
耐磨温度传感器用聚丙烯酸十八烷基酯接枝的多壁碳纳米管复合材料
基于纳米碳的无序，导电，聚合物纳米复合材料（DCPNs）在材料科学的广泛应用中越来越多地被采用。DCPN的特征是在电子现象中表现出较差的导电性和不可复制性/不可逆性，这在很大程度上是由于此类系统固有的渗透性无序特性。本文的作者提出了在测温应用中增强纳米碳基DCPNs的热响应性，可重复性和可逆性的替代方法。通过可逆加成-断裂链转移（RAFT）聚合合成的聚（丙烯酸十八烷基酯）-接枝-多壁碳纳米管（PODA- g- MWCNT）经验性地证明了这一点。合成PODA- g-MWCNT在微妙的玻璃化转变过程中表现出可重复的，近乎热敏化的，类似开关的电子响应，其特征是在315.1 K（42.0°C）下，电阻值的正温度系数非常大，为7496.53％K –1 ±3950.58％K –1。这对应于17.39kΩ的K的相当大的转变速率-1 ±0.49千欧ķ -1在298.2 K（25.1℃），且可恢复接近室温电阻值246.17Ω±12.19Ω的。这项工作中组装的接近人体温度敏感的PODA- g -MWCNT是可穿戴温度传感器和其他测温应用的有希望的候选者。
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