HCl guided morphology and conductivity of chiral PPy nanostructures toward efficient electromagnetic wave absorption

作     者：YANG XiaoFen FAN BaoXin WANG XinXin WU LiShan YAO QiBin TONG GuoXiu WU WenHua CHEN DaBo YANG XiaoFen;FAN BaoXin;WANG XinXin;WU LiShan;YAO QiBin;TONG GuoXiu;WU WenHua;CHEN DaBo

作者机构：College of Chemistry and Life SciencesKey Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhua 321004China NEW MORE Graphene Application Technology Co.Ltd.Jinhua 321004China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2022年第65卷第4期

页      面：837-848页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 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：supported by the National Natural Science Foundation of China(Grant No. 52073260) the Public Utility Items of Zhejiang Province (Grant No. LGG21E020002) the Industrial Key Projects of Jinhua City (Grant No.2019A12238) the Self-Topic Fund of Zhejiang Normal University(Grant No. 2020ZS04) 

主　　题：PPy planar helix CTAB template assisted oxypolymerization strategy electromagnetic wave absorption performance absorption mechanism 

摘      要：To solve the severe electromagnetic(EM)radiation from the widespread application of electronic equipment,we developed a simple template-guided oxypolymerization strategy to synthesize polypyrrole(PPy)planar helixes as an efficient EM wave(EMW)absorber,and systematically investigated the morphology-dependent chirality,conductivity,and microwave absorption *** HCl concentration[HCl]varied from 0 to 2.0 M,the morphology evolved from planar helix to 3D cross-linking network structures,the conductivity increased from 0.0019 to 0.0302 S/cm,and the EM parameters peaked at[HCl]=0.5 *** to other absorbers,the PPy planar helix formed at[HCl]=0 M possessed wider absorption band(5.84 GHz),smaller matching thickness(1.6 mm),lower loading(25 wt.%),and intenser absorption(-48.17 dB).The reason lies in the strong attenuation capability,multiple resonances,multiple scattering,and good impedance matching generated by chiral PPy planar helixes with a distinctive helical configuration,doped heteroatoms(O,S),and a local conductive *** results suggest that PPy planar helixes offer great promise for fields such as chiral sensors,electronics,optics,chiral catalysis,and EMW absorption and shielding due to their distinctive morphology,tunable conductivity,and outstanding EMW absorption properties(EMWAPs).