Multifunctional cellular carbon foams derived from chitosan toward self-cleaning, thermal insulation, and highly efficient microwave absorption properties  

作　　者：Beibei Zhan Yanling Hao Xiaosi Qi Yunpeng Qu Junfei Ding Jing-liang Yang Xiu Gong Yanli Chen Qiong Peng Wei Zhong 

机构地区：[1]College of Physics,Guizhou Province Key Laboratory for Photoelectrics Technology and Application,Guizhou University,Guiyang 550025,China [2]Minzu Normal University of Xingyi,Xingyi 562400,China [3]National Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for NanoTechnology,Nanjing University,Nanjing 210093,China

出　　处：《Nano Research》2024年第3期927-938,共12页纳米研究（英文版）

基　　金：supported by the Platform of Science and Technology and Talent Team Plan of Guizhou province(No.GCC[2023]007);the Doctorial Start-up Fund of Guizhou University(No.2011-05);the Fok Ying Tung Education Foundation(No.171095);the Talent Project of Guizhou Provincial Education Department(No.2022-094);the Guizhou Provincial Science and Technology Projects(No.ZK 2022-General 044);the National Natural Science Foundation of China(No.11964006).

摘　　要：To adapt the practical demand,designing and constructing the multifunctional microwave absorbers(MAs)is the key future direction of research and development.However,effective integrating the multiple functions into a single material remains a huge challenge.Herein,cellular carbon foams(CCFs)with different porous structures were elaborately designed and fabricated in high efficiency through a facile continuous freeze-drying and carbonization processes using a sustainable biomass chitosan as the precursor.The obtained results revealed that the thermal treated temperature and g-C_(3)N_(4) amount played a great impact on the carbonization degrees,pore sizes,and morphologies of CCFs,which led to their tunable electromagnetic(EM)parameters,improved conduction loss,and polarization loss abilities.Owing to the special cellular structure,the designed CCFs samples simultaneously displayed the strong absorption capabilities,broad absorption bandwidths,and thin matching thicknesses.Meanwhile,the as-prepared CCFs exhibited the strong hydrophobicity and good thermal insulation,endowing its attractive functions of self-cleaning and thermal insulation.Therefore,our findings not only presented a facile approach to produce different porous structures of CCFs,but also provided an effective strategy to develop multifunctional high-performance MAs on basis of three-dimensional CCFs.

关 键 词：multifunctional microwave absorbers carbon foams cellular structure SELF-CLEANING thermal insulation 

分 类 号：O62[理学—有机化学]