Advanced functional Kevlar composite with excellent mechanical properties for thermal management and intelligent safeguarding
Advanced functional Kevlar composite with excellent mechanical properties for thermal management and intelligent safeguarding
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先进的功能性凯夫拉复合材料具有优异的机械性能，适用于热管理和智能防护
DOI：
10.1016/j.cej.2021.131878
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发表时间：
2021-09-02
影响因子：
15.1
通讯作者：
Gong, Xinglong
中科院分区：
文献类型：
--
作者：
Zhou, Jianyu;Zhang, Junshuo;Gong, Xinglong
基于织物的个人热管理设备推动了柔性加热器的发展，柔性加热器在药物治疗和保护人类免受寒冷环境中发挥重要作用。但是，由于机械性能较差，大多数加热器在动态载荷力作用下容易损坏，也难以为人类提供必要的抗冲击保护。因此，开发具有高机械性能的多功能织物加热器具有重要意义。本文通过将Kevlar纤维、剪切硬化凝胶（SSG）和二维MXene组装在一起，开发了一种新型的MXene/SSG/Kevlar基多功能纺织复合材料（MS-Kevlar），该复合材料具有灵敏监测、热管理和冲击防护功能。这种MS-Kevlar对从轻微的生理活动到高速子弹冲击的各种刺激具有高灵敏度的监测特性。具有优异导电性的MS-Kevlar具有高的热管理性能，在6 V工作电压下可达到80.9 ℃。除了热防护性能外，多功能MS-Kevlar在低速冲击下可以吸收55.4%的力，并且在冲击后仍然保持电热性能。更重要的是，与纯Kevlar相比，MS-Kevlar的弹道极限速度增加了142.1%以上，可以为人类提供保护。最后，设计了一种具有隔热和抗冲击性能的智能窗帘，并基于该智能窗帘设计的无线冲击报警系统，有利于人们对危险的评估和规避。
Fabric-based personal thermal management devices propel the development of flexible heaters which play important roles in medicinal therapy and protecting humans from cold environments. However, due to the poor mechanical properties, most heaters are easy to be damaged under dynamic loading forces, and also difficult to provide necessary anti-impact protection for human beings. Therefore, it is significant to develop multifunctional fabric heaters with high mechanical properties. Herein, a novel MXene/SSG/Kevlar-based multifunctional textile composite (MS-Kevlar) with sensitive monitoring, thermal management and impact protection is developed by assembling Kevlar fiber, shear stiffening gel (SSG) and two-dimensional MXene. This MS-Kevlar has high sensitive monitoring properties to various stimuli from slight physiological activities to high-speed bullet impact. MS-Kevlar with excellent conductivity shows high thermal management properties which can reach 80.9 degrees C at 6 V working voltage. Besides thermal protection property, the multifunctional MS-Kevlar can absorb 55.4% force under low-speed impact and still retain the electro-thermal performance after impacted. More importantly, the ballistic limit velocity of MS-Kevlar increases more than 142.1% compared with that of neat Kevlar which could provide safeguarding for humans. Finally, a smart curtain with thermal and anti-impact performance was designed and the based wireless impact alarm system is beneficial for people to assess and avoid dangers.