High-performance porous carbon foams via catalytic pyrolysis of modified isocyanate-based polyimide foams for electromagnetic shielding

作     者：Zhouping Sun Bin Shen Yang Li Jiali Chen Wenge Zheng Zhouping Sun;Bin Shen;Yang Li;Jiali Chen;Wenge Zheng

作者机构：Ningbo Key Lab of Polymer MaterialsNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of SciencesBeijing 100049China College of Chemistry and Pharmaceutical EngineeringHuanghuai UniversityZhumadian 463000China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2022年第15卷第8期

页      面：6851-6859页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Youth Innovation Promotion Association of Chinese Academy of Sciences(No.2022300) Natural Science Foundation of Ningbo(No.202003N4026) China Postdoctoral Science Foundation(No.2020M682375)’Key Scientific Research Projects of Colleges and Universities in Henan Province(No.21A430025) 

主　　题：porous carbon skeletons isocyanate-based polyimide foams catalytic graphitization electromagnetic interference shielding multiple functions 

摘      要：Porous carbon skeletons(PCSs)derived from isocyanate-based aromatic polyimide foams(PIFs)by high-temperature pyrolysis are very promising in the fabrication of high-performance polymer composite foams for electromagnetic interference(EMI)shielding due to their efficient conductive networks and facile preparation ***,severe volumetric shrinkage and low graphitization degree is not conducive to enhancing the shielding efficiency of the ***,ferric acetylacetonate and carbon-nanotube coating have been introduced in isocyanate-based PIFs to greatly suppress the serious shrinkage during pyrolysis and improve the graphitization degree of the final carbon foams through the Fe-catalytic graphitization process,thereby endowing them with better EMI-shielding performance even at lower pyrolysis temperature compared to the control ***,compressible polydimethylsiloxane(PDMS)composite foams with the as-prepared carbon foams as prefabricated PCSs have also been fabricated,which could provide not only stable shielding effectiveness(SE)performance even after a thousand compressions,but also multiple functions of Joule heating,thermal insulation and infrared *** study offers a feasible route to prepare high-performance PCSs in a more energy-efficient manner via PIF pyrolysis,which is very promising in the manufacture of multifunctional conductive polymer composite foams.