Enhancing the firefighting protective clothing with exceptional thermal barrier and temperature sensing functions to ensure high fire safety for firefighters has long been anticipated,but it remains a major challenge....Enhancing the firefighting protective clothing with exceptional thermal barrier and temperature sensing functions to ensure high fire safety for firefighters has long been anticipated,but it remains a major challenge.Herein,inspired by the human muscle,an anisotropic fire safety aerogel(ACMCA)with precise self-actuated temperature monitoring performance is developed by combining aramid nanofibers with eicosane/MXene to form an anisotropically oriented conductive network.By combining the two synergies of the negative temperaturedependent thermal conductive eicosane,which induces a high-temperature differential,and directionally ordered MXene that establishes a conductive network along the directional freezing direction.The resultant ACMCA exhibited remarkable thermoelectric properties,with S values reaching 46.78μV K^(−1)andκvalues as low as 0.048 W m^(−1)K^(−1)at room temperature.Moreover,the prepared anisotropic aerogel ACMCA exhibited electrical responsiveness to temperature variations,facilitating its application in intelligent temperature monitoring systems.The designed anisotropic aerogel ACMCA could be incorporated into the firefighting clothing as a thermal barrier layer,demonstrating a wide temperature sensing range(50-400℃)and a rapid response time for early high-temperature alerts(~1.43 s).This work provides novel insights into the design and application of temperature-sensitive anisotropic aramid nanofibers aerogel in firefighting clothing.展开更多
Firefighting clothing provides essential safeguards for firefighters while engaging in fire suppression and life rescue operations.However,the inability to actively detect hazardous gas and self-thermal degradation of...Firefighting clothing provides essential safeguards for firefighters while engaging in fire suppression and life rescue operations.However,the inability to actively detect hazardous gas and self-thermal degradation of conventional firefighting clothing induce critical safety threats to firefighters.Herein,we design a dual-mode perceptual sensor via programmable assembly of single-walled carbon nanotubes(SWCNTs)and Ti_(3)C_(2)T_(x) MXene@MoS_(2) nanocomposite in dual-mode triaxial structural aerogel fiber(DM-TSF)for both selective NH_(3) and temperature monitoring.The DM-TSF is prepared through triaxial wet spinning,with an alternating p/n-type thermoelectric(TE)core,a signal decoupling aramid nanofibers layer,and an NH3 sensing outer sheath.The TE core is composed of alternately interconnected p-type/SWCNT and n-type SWCNT/Polyethyleneimine,which exhibits high TE efficiency(8.44μV K^(-1) for p-segment,7.44μV K^(-1) for n-segment)and widerange(10-500℃)temperature monitoring in DM-TSF.Furthermore,the abundant adsorption sites and high-density Schottky heterojunctions of the Ti_(3)C_(2)T_(x) MXene@MoS_(2) nanocomposite in the outer sheath enabled DM-TSF to exhibit an outstanding sensitivity(3.14%ppm−1@20 ppm)and high selectivity for NH_(3).A portable wireless system based on DM-TSF was further developed and integrated into firefighting clothing for temperature and NH_(3) monitoring,triggering alarms within 2 s and 28 s,respectively.This work sheds new light on the fabrication of intelligent multiplex hazard detection fibers that can respond to multi-hazard elements,thereby enhancing firefighters’safety in complex fire scenarios.展开更多
基金funding support from Guiding Project of Scientific Research Plan of Education Department of Hubei Province and Wuhan Textile University School Fund(B)(k24016).
文摘Enhancing the firefighting protective clothing with exceptional thermal barrier and temperature sensing functions to ensure high fire safety for firefighters has long been anticipated,but it remains a major challenge.Herein,inspired by the human muscle,an anisotropic fire safety aerogel(ACMCA)with precise self-actuated temperature monitoring performance is developed by combining aramid nanofibers with eicosane/MXene to form an anisotropically oriented conductive network.By combining the two synergies of the negative temperaturedependent thermal conductive eicosane,which induces a high-temperature differential,and directionally ordered MXene that establishes a conductive network along the directional freezing direction.The resultant ACMCA exhibited remarkable thermoelectric properties,with S values reaching 46.78μV K^(−1)andκvalues as low as 0.048 W m^(−1)K^(−1)at room temperature.Moreover,the prepared anisotropic aerogel ACMCA exhibited electrical responsiveness to temperature variations,facilitating its application in intelligent temperature monitoring systems.The designed anisotropic aerogel ACMCA could be incorporated into the firefighting clothing as a thermal barrier layer,demonstrating a wide temperature sensing range(50-400℃)and a rapid response time for early high-temperature alerts(~1.43 s).This work provides novel insights into the design and application of temperature-sensitive anisotropic aramid nanofibers aerogel in firefighting clothing.
基金supported by the funding support from Guiding Project of Scientific Research Plan of Education Department of Hubei ProvinceWuhan Textile University School Fund(B)(k24016).
文摘Firefighting clothing provides essential safeguards for firefighters while engaging in fire suppression and life rescue operations.However,the inability to actively detect hazardous gas and self-thermal degradation of conventional firefighting clothing induce critical safety threats to firefighters.Herein,we design a dual-mode perceptual sensor via programmable assembly of single-walled carbon nanotubes(SWCNTs)and Ti_(3)C_(2)T_(x) MXene@MoS_(2) nanocomposite in dual-mode triaxial structural aerogel fiber(DM-TSF)for both selective NH_(3) and temperature monitoring.The DM-TSF is prepared through triaxial wet spinning,with an alternating p/n-type thermoelectric(TE)core,a signal decoupling aramid nanofibers layer,and an NH3 sensing outer sheath.The TE core is composed of alternately interconnected p-type/SWCNT and n-type SWCNT/Polyethyleneimine,which exhibits high TE efficiency(8.44μV K^(-1) for p-segment,7.44μV K^(-1) for n-segment)and widerange(10-500℃)temperature monitoring in DM-TSF.Furthermore,the abundant adsorption sites and high-density Schottky heterojunctions of the Ti_(3)C_(2)T_(x) MXene@MoS_(2) nanocomposite in the outer sheath enabled DM-TSF to exhibit an outstanding sensitivity(3.14%ppm−1@20 ppm)and high selectivity for NH_(3).A portable wireless system based on DM-TSF was further developed and integrated into firefighting clothing for temperature and NH_(3) monitoring,triggering alarms within 2 s and 28 s,respectively.This work sheds new light on the fabrication of intelligent multiplex hazard detection fibers that can respond to multi-hazard elements,thereby enhancing firefighters’safety in complex fire scenarios.
