Reactive MnO_(2) template-assisted synthesis of double-shelled PPy hollow nanotubes to boost microwave absorption  

作　　者：Huiling Gu Ji Huang Na Li Hua Yang Gang Chen Chengjun Dong Chunhong Gong Hongtao Guan 

机构地区：[1]School of Materials and Energy,Yunnan University,Kunming 650091,China [2]College of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004,China

出　　处：《Journal of Materials Science & Technology》2023年第15期145-153,共9页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.22165032 and 22265031);the Applied Basic Research Fund of Yunnan Province(No.2019FB129);the Major Science and Technology Project of Precious Metal Materials Genetic Engineering in Yunnan Province(No.2021102AB080019-2)。

摘　　要：Microwave absorbing materials(MAMs)with wide effective absorption bandwidth(EAB)and low filling ratio are highly desirable for practical applications.Rational design in components and structures is one of the effective strategies to achieve MAMs with high performance.Herein,double-shelled hollow(DSH)polypyrrole(PPy)nanotubes were synthesized with hydrochloric acid(HCl)and sodium pstyrene sulfonate(SS)co-doping polymerization process using manganese dioxide(MnO_(2))nanorods as a self-sacrifice template.With the increase of HCl concentration,the 1D MnO_(2) core diminishes gradually to form the MnO_(2)@PPy coaxial nanostructures and finally the DSH PPy nanotube,which tunes the microwave absorption performance.Importantly,the DSH PPy nanotubes exhibit excellent microwave absorption of an optimal reflection loss of–50.4 dB and a wide EAB of 7.7 GHz with a low filling ratio of 5 wt%in a paraffin wax matrix.The excellent microwave absorption is believed to be mainly attributed to the enhanced synergistic effects of interfacial polarization and conduction loss arising from the unique DSH structure and the co-doping polymerization.

关 键 词：PPy nanotube MnO_(2)template Double-shelled hollow structure Microwave absorption 

分 类 号：TB383.1[一般工业技术—材料科学与工程]