Hierarchically porous composite fabrics with ultrahigh metal–organic framework loading for zero-energy-consumption heat dissipation  

用于零能耗散热的分层多孔金属有机框架复合织物

作　　者：Xiangyu Liu Pengli Li Jie Chen Pingkai Jiang Yiu-Wing Mai Xingyi Huang 刘翔宇;李鹏里;陈杰;江平开;米耀荣;黄兴溢(Shanghai Key Laboratory of Electrical,Insulation and Thermal Ageing,Department of Polymer Science and Engineering,State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China;Centre for Advanced Materials Technology,School of Aerospace,Mechanical and Mechatronic Engineering,The University of Sydney,Sydney NSW 2006,Australia)

机构地区：[1]Shanghai Key Laboratory of Electrical,Insulation and Thermal Ageing,Department of Polymer Science and Engineering,State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China [2]Centre for Advanced Materials Technology,School of Aerospace,Mechanical and Mechatronic Engineering,The University of Sydney,Sydney NSW 2006,Australia

出　　处：《Science Bulletin》2022年第19期1991-2000,共10页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51877132,U19A20105,and 52003153);the Program of Shanghai Academic Research Leader(21XD1401600)。

摘　　要：The long-term safe operation of high-power equipment and integrated electronic devices requires efficient thermal management,which in turn increases the energy consumption further.Hence,the sustainable development of our society needs advanced thermal management with low,even zero,energy consumption.Harvesting water from the atmosphere,followed by moisture desorption to dissipate heat,is an efficient and feasible approach for zero-energy-consumption thermal management.However,current methods are limited by the low absorbance of water,low water vapor transmission rate(WVTR)and low stability,thus resulting in low thermal management capability.In this study,we report an innovative electrospinning method to process hierarchically porous metal–organic framework(MOF)composite fabrics with high-efficiency and zero-energy-consumption thermal management.The composite fabrics are highly loaded with MOF(75 wt%)and their WVTR value can be up to 3138 g m^(-2) d^(-1).The composite fabrics also exhibit stable microstructure and performance.Under a conventional environment(30℃,60%relative humidity),the composite fabrics adsorb water vapor for regeneration within 1.5 h to a saturated value Wsat of 0.614 g g^(-1),and a corresponding equivalent enthalpy of 1705.6 J g^(-1).In the thermal management tests,the composite fabrics show a strong cooling capability and significantly improve the performance of thermoelectric devices,portable storage devices and wireless chargers.These results suggest that hierarchically porous MOF composite fabrics are highly promising for thermal management of intermittent-operation electronic devices.高功率装备和集成电子设备的长期安全运行需要有效的热管理,而这反过来又进一步增加了能源消耗.社会的可持续发展需要先进的低能耗甚至零能耗的热管理技术.从大气中收集水分、然后通过解吸附的方式释放水分进行散热,是一种有效且可行的零能耗热管理方式.然而,目前的吸湿材料难以兼具高水饱和吸附量、高水蒸气透过率以及高稳定性,从而导致热管理能力较低.本文报道了一种创新的静电纺丝方法——湿度控制电纺,并采用该方法制备了具有高效和零能耗热管理功能的分层多孔金属有机框架(MOF)复合织物.该复合织物中MOF含量高达75%(重量百分比),且表现出高水蒸气透过性以及稳定的微结构与性能.在常规环境下,复合织物在1.5 h内吸附水蒸气再生至饱和值达0.614 g g^(-1),相应的等效焓高达1705.6 J g^(-1).在实测中,复合织物表现出强大的冷却能力,显著提高了热电器件、便携式存储设备和无线充电器的性能.

关 键 词：Metal-organic framework Hierarchically porous materials Adsorption-based cooling ELECTROSPINNING 

分 类 号：TQ340.64[化学工程—化纤工业] TB332[一般工业技术—材料科学与工程]