TY - JOUR
T1 - Enhanced microwave absorption performance of polyaniline-coated CNT hybrids by plasma-induced graft polymerization
AU - Cheng, Junye
AU - Zhao, Bin
AU - Zheng, Shiyou
AU - Yang, Junhe
AU - Zhang, Deqing
AU - Cao, Maosheng
N1 - Publisher Copyright:
© 2015, Springer-Verlag Berlin Heidelberg.
PY - 2015/4
Y1 - 2015/4
N2 - Highly conducting CNT/polyaniline hybrids were prepared by plasma-induced graft polymerization, i.e., plasma pretreatment of CNTs and further in situ polymerization of aniline. Plasma pretreatment made more aniline grafted on the CNTs’ surface by the role of oxygen radicals. SEM images showed that the surfaces of CNTs were uniformly coated by PANI. FTIR showed that there was presence of strong interaction between CNTs and PANI molecular chains. The conductivity of CNT/PANI hybrids with plasma treatment is higher than that of CNT/PANI hybrids without plasma pretreatment (0.443 S/cm at 0 W) or pretreated by acid oxidation method. Importantly, the microwave absorption properties were investigated by measuring complex permeability, complex permittivity and reflection loss in a frequency of 2–18 GHz. The microwave absorption enhancement of CNT/PANI hybrids results mainly from dielectric loss rather than magnetic loss due to higher value of dielectric loss.
AB - Highly conducting CNT/polyaniline hybrids were prepared by plasma-induced graft polymerization, i.e., plasma pretreatment of CNTs and further in situ polymerization of aniline. Plasma pretreatment made more aniline grafted on the CNTs’ surface by the role of oxygen radicals. SEM images showed that the surfaces of CNTs were uniformly coated by PANI. FTIR showed that there was presence of strong interaction between CNTs and PANI molecular chains. The conductivity of CNT/PANI hybrids with plasma treatment is higher than that of CNT/PANI hybrids without plasma pretreatment (0.443 S/cm at 0 W) or pretreated by acid oxidation method. Importantly, the microwave absorption properties were investigated by measuring complex permeability, complex permittivity and reflection loss in a frequency of 2–18 GHz. The microwave absorption enhancement of CNT/PANI hybrids results mainly from dielectric loss rather than magnetic loss due to higher value of dielectric loss.
UR - http://www.scopus.com/inward/record.url?scp=84924413063&partnerID=8YFLogxK
U2 - 10.1007/s00339-014-8977-z
DO - 10.1007/s00339-014-8977-z
M3 - Article
AN - SCOPUS:84924413063
SN - 0947-8396
VL - 119
SP - 379
EP - 386
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - 1
ER -