The development of functional composites with excellent thermal management capabilities and electro-magnetic interference(EMI)shielding has become extremely urgent for keeping up with the continuous improvement of the operating speed and efficiency for electronic equipment.In this study,the biolog-ical wood-derived porous carbon(WPC)was determined as the supporting material to encapsulating polyethylene glycol(PEG),and a series of WPC/PEG/Fe3O4 phase change composites(PCCs)with excel-lent shape stability,EMI shielding and thermal management capabilities were prepared via a simple vac-uum impregnation method.The Fe3O4 magnetic particles modified PCCs have greatly improved the EMI shielding effectiveness(SE).The EMI SE of WP-4(7.5 wt.％Fe3O4 in PEG)can be up to 55.08 dB between 8.2-12.4 GHz,however,the WP-O without Fe3O4 addition is only 40.08 dB.Meanwhile,the absorption ratio of electromagnetic waves(EMW)has also increased from 75.02％(WP-0)to 85.56％(WP-4),which effectively prevents secondary pollution.In addition,after wrapping a thin layer of polydimethylsiloxane resin(PDMS),the obtained WP-4 can maintain a high heat storage capacity(109.52 J/g)and good wa-ter stability.In short,the prepared WPC/PEG/Fe3O4 PCCs have great potential application value in the thermal management and electromagnetic shielding requirements for electronic devices.

Shuang Liu;Mengjie Sheng;Hao Wu;Xuetao Shi;Xiang Lu;Jinping Qu

Key Laboratory of Material Chemistry for Energy Conversion and Storage,Huazhong University of Science&Technology,Ministry of Education,Wuhan 430074,PR China;Hubei Engineering Research Center for Biomaterials and Medical Protective Materials,Huazhong University of Science&Technology,Wuhan 430074,PR China;Hubei Key Laboratory of Material Chemistry and Service Failure,School of Chemistry and Chemical Engineering,Huazhong University of Science&Technology,Wuhan 430074,PR China;Shaanxi Key Laboratory of Macromolecular Science and Technology.School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi'an 710072,China;School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,PR China

材料科学技术（英文版）

[1]Shuang Liu;Mengjie Sheng;Hao Wu;Xuetao Shi;Xiang Lu;Jinping Qu-.Biological porous carbon encapsulated polyethylene glycol-based phase change composites for integrated electromagnetic interference shielding and thermal management capabilities)[J].材料科学技术（英文版）,2022(18):147-157

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